Merge branch 'trz/rebase' into trz/rename

134 files changed, 13072 insertions, 3510 deletions

diff --git a/src/main/java/de/thedevstack/conversationsplus/Config.java b/src/main/java/de/thedevstack/conversationsplus/Config.java
index 08e7d862..71227be0 100644
--- a/src/main/java/de/thedevstack/conversationsplus/Config.java
+++ b/src/main/java/de/thedevstack/conversationsplus/Config.java
@@ -6,19 +6,75 @@ import de.thedevstack.conversationsplus.xmpp.chatstate.ChatState;
 
 public final class Config {
 
+
+	private static final int UNENCRYPTED = 1;
+	private static final int OPENPGP = 2;
+	private static final int OTR = 4;
+	private static final int OMEMO = 8;
+
+	private static final int ENCRYPTION_MASK = UNENCRYPTED | OPENPGP | OTR | OMEMO;
+
+	public static boolean supportUnencrypted() {
+		return (ENCRYPTION_MASK & UNENCRYPTED) != 0;
+	}
+
+	public static boolean supportOpenPgp() {
+		return (ENCRYPTION_MASK & OPENPGP) != 0;
+	}
+
+	public static boolean supportOpenPgpOnly() {
+		return supportOpenPgp() && !multipleEncryptionChoices();
+	}
+
+	public static boolean supportOtr() {
+		return (ENCRYPTION_MASK & OTR) != 0;
+	}
+
+	public static boolean supportOmemo() {
+		return ConversationsPlusPreferences.omemoEnabled();
+	}
+
+	public static boolean multipleEncryptionChoices() {
+		return (ENCRYPTION_MASK & (ENCRYPTION_MASK - 1)) != 0;
+	}
+
 	public static final String LOGTAG = "conversations";
 
+
+	public static final String DOMAIN_LOCK = null; //only allow account creation for this domain
+	public static final String CONFERENCE_DOMAIN_LOCK = null; //only allow conference creation for this domain
+	public static final boolean LOCK_DOMAINS_IN_CONVERSATIONS = false; //only add contacts and conferences for own domains
+
+	public static final boolean SINGLE_ACCOUNT = false; //set to true to allow only one account
+	public static final boolean DISALLOW_REGISTRATION_IN_UI = false; //hide the register checkbox
+
+	public static final boolean ALLOW_NON_TLS_CONNECTIONS = false; //very dangerous. you should have a good reason to set this to true
+	public static final boolean HIDE_MESSAGE_TEXT_IN_NOTIFICATION = false;
+	public static final boolean SHOW_CONNECTED_ACCOUNTS = false; //show number of connected accounts in foreground notification
+
+	public static final boolean ALWAYS_NOTIFY_BY_DEFAULT = false;
+
+	public static final boolean LEGACY_NAMESPACE_HTTP_UPLOAD = false;
+
 	public static final int PING_MAX_INTERVAL = 300;
 	public static final int PING_MIN_INTERVAL = 30;
-	public static final int PING_TIMEOUT = 10;
+	public static final int PING_TIMEOUT = 15;
 	public static final int SOCKET_TIMEOUT = 15;
 	public static final int CONNECT_TIMEOUT = 90;
-	public static final int CARBON_GRACE_PERIOD = 60;
+	public static final int CONNECT_DISCO_TIMEOUT = 20;
+	public static final int CARBON_GRACE_PERIOD = 90;
 	public static final int MINI_GRACE_PERIOD = 750;
 
+	public static final boolean CLOSE_TCP_WHEN_SWITCHING_TO_BACKGROUND = false;
+
 	public static final int AVATAR_SIZE = 192;
 	public static final Bitmap.CompressFormat AVATAR_FORMAT = Bitmap.CompressFormat.PNG;
 
+	public static final int IMAGE_SIZE = 1920;
+	public static final Bitmap.CompressFormat IMAGE_FORMAT = Bitmap.CompressFormat.JPEG;
+	public static final int IMAGE_QUALITY = 75;
+	public static final int IMAGE_MAX_SIZE = 524288; //512KiB
+
 	public static final int MESSAGE_MERGE_WINDOW = 20;
 
 	public static final boolean UTF8_EMOTICONS = false;
@@ -29,13 +85,24 @@ public final class Config {
 	public static final int PROGRESS_UI_UPDATE_INTERVAL = 750;
 	public static final int REFRESH_UI_INTERVAL = 500;
 
-	public static final boolean NO_PROXY_LOOKUP = false; //useful to debug ibb
+	public static final boolean DISABLE_PROXY_LOOKUP = false; //useful to debug ibb
+	public static final boolean DISABLE_HTTP_UPLOAD = false;
 	public static final boolean DISABLE_STRING_PREP = false; // setting to true might increase startup performance
-	public static final boolean EXTENDED_SM_LOGGING = true; // log stanza counts
+	public static final boolean EXTENDED_SM_LOGGING = false; // log stanza counts
 	public static final boolean RESET_ATTEMPT_COUNT_ON_NETWORK_CHANGE = true; //setting to true might increase power consumption
 
 	public static final boolean ENCRYPT_ON_HTTP_UPLOADED = false;
 
+	public static final boolean REPORT_WRONG_FILESIZE_IN_OTR_JINGLE = true;
+
+	public static final boolean SHOW_REGENERATE_AXOLOTL_KEYS_BUTTON = false;
+
+	public static final boolean X509_VERIFICATION = false; //use x509 certificates to verify OMEMO keys
+
+	public static final boolean IGNORE_ID_REWRITE_IN_MUC = true;
+
+	public static final boolean REQUEST_DISCO = true;
+
 	public static final long MILLISECONDS_IN_DAY = 24 * 60 * 60 * 1000;
 	public static final long MAM_MAX_CATCHUP =  MILLISECONDS_IN_DAY / 2;
 	public static final int MAM_MAX_MESSAGES = 500;
@@ -81,6 +148,5 @@ public final class Config {
 	};
 
 	private Config() {
-
 	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/ConversationsPlusApplication.java b/src/main/java/de/thedevstack/conversationsplus/ConversationsPlusApplication.java
index e4fabda5..f5f4c057 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ConversationsPlusApplication.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ConversationsPlusApplication.java
@@ -8,6 +8,7 @@ import android.preference.PreferenceManager;
 import java.io.File;
 
 import de.thedevstack.conversationsplus.utils.ImageUtil;
+import de.thedevstack.conversationsplus.R;
 import de.thedevstack.conversationsplus.utils.SerialSingleThreadExecutor;
 
 /**
diff --git a/src/main/java/de/thedevstack/conversationsplus/ConversationsPlusPreferences.java b/src/main/java/de/thedevstack/conversationsplus/ConversationsPlusPreferences.java
index 17829998..20eca48a 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ConversationsPlusPreferences.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ConversationsPlusPreferences.java
@@ -14,6 +14,10 @@ public class ConversationsPlusPreferences extends Settings {
     private static ConversationsPlusPreferences instance;
     private final SharedPreferences sharedPreferences;
 
+    public static boolean omemoEnabled() {
+        return getBoolean("omemo_enabled", false);
+    }
+
     public static String imgTransferFolder() {
         return getString("img_transfer_folder", getString("app_name", "Conversations+"));
     }
@@ -168,9 +172,6 @@ public class ConversationsPlusPreferences extends Settings {
     public static boolean forceEncryption() {
         return getBoolean("force_encryption", false);
     }
-    public static boolean confirmMessages() {
-        return getBoolean("confirm_messages", true);
-    }
 
     public static boolean dontSaveEncrypted() {
         return getBoolean("dont_save_encrypted", false);
@@ -193,6 +194,10 @@ public class ConversationsPlusPreferences extends Settings {
         return getBoolean("indicate_received", false);
     }
 
+    public static boolean allowMessageCorrection() {
+        return getBoolean("allow_message_correction", true);
+    }
+
     private ConversationsPlusPreferences(SharedPreferences sharedPreferences) {
         this.sharedPreferences = sharedPreferences;
     }
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/OtrService.java b/src/main/java/de/thedevstack/conversationsplus/crypto/OtrService.java
index e36007d7..34023d9f 100644
--- a/src/main/java/de/thedevstack/conversationsplus/crypto/OtrService.java
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/OtrService.java
@@ -1,5 +1,18 @@
 package de.thedevstack.conversationsplus.crypto;
 
+import net.java.otr4j.OtrEngineHost;
+import net.java.otr4j.OtrException;
+import net.java.otr4j.OtrPolicy;
+import net.java.otr4j.OtrPolicyImpl;
+import net.java.otr4j.crypto.OtrCryptoEngineImpl;
+import net.java.otr4j.crypto.OtrCryptoException;
+import net.java.otr4j.session.FragmenterInstructions;
+import net.java.otr4j.session.InstanceTag;
+import net.java.otr4j.session.SessionID;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
 import java.math.BigInteger;
 import java.security.KeyFactory;
 import java.security.KeyPair;
@@ -11,32 +24,18 @@ import java.security.spec.DSAPrivateKeySpec;
 import java.security.spec.DSAPublicKeySpec;
 import java.security.spec.InvalidKeySpecException;
 
-import org.json.JSONException;
-import org.json.JSONObject;
-
 import de.thedevstack.android.logcat.Logging;
-
-import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.generator.MessageGenerator;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
-import de.thedevstack.conversationsplus.utils.CryptoHelper;
 import de.thedevstack.conversationsplus.xmpp.chatstate.ChatState;
 import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 import de.thedevstack.conversationsplus.xmpp.stanzas.MessagePacket;
 
-import net.java.otr4j.OtrEngineHost;
-import net.java.otr4j.OtrException;
-import net.java.otr4j.OtrPolicy;
-import net.java.otr4j.OtrPolicyImpl;
-import net.java.otr4j.crypto.OtrCryptoEngineImpl;
-import net.java.otr4j.crypto.OtrCryptoException;
-import net.java.otr4j.session.InstanceTag;
-import net.java.otr4j.session.SessionID;
-import net.java.otr4j.session.FragmenterInstructions;
-
 public class OtrService extends OtrCryptoEngineImpl implements OtrEngineHost {
 
 	private Account account;
@@ -181,10 +180,7 @@ public class OtrService extends OtrCryptoEngineImpl implements OtrEngineHost {
 			packet.setAttribute("to", session.getAccountID() + "/" + session.getUserID());
 		}
 		packet.setBody(body);
-		packet.addChild("private", "urn:xmpp:carbons:2");
-		packet.addChild("no-copy", "urn:xmpp:hints");
-		packet.addChild("no-permanent-store", "urn:xmpp:hints");
-		packet.addChild("no-permanent-storage", "urn:xmpp:hints");
+		MessageGenerator.addMessageHints(packet);
 		try {
 			Jid jid = Jid.fromSessionID(session);
 			Conversation conversation = mXmppConnectionService.find(account,jid);
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/PgpDecryptionService.java b/src/main/java/de/thedevstack/conversationsplus/crypto/PgpDecryptionService.java
new file mode 100644
index 00000000..b833f6e4
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/PgpDecryptionService.java
@@ -0,0 +1,162 @@
+package de.thedevstack.conversationsplus.crypto;
+
+import android.app.PendingIntent;
+
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.concurrent.ConcurrentHashMap;
+
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.ui.UiCallback;
+
+public class PgpDecryptionService {
+
+	private final XmppConnectionService xmppConnectionService;
+	private final ConcurrentHashMap<String, List<Message>> messages = new ConcurrentHashMap<>();
+	private final ConcurrentHashMap<String, Boolean> decryptingMessages = new ConcurrentHashMap<>();
+	private Boolean keychainLocked = false;
+	private final Object keychainLockedLock = new Object();
+
+	public PgpDecryptionService(XmppConnectionService xmppConnectionService) {
+		this.xmppConnectionService = xmppConnectionService;
+	}
+
+	public void add(Message message) {
+		if (isRunning()) {
+			decryptDirectly(message);
+		} else {
+			store(message);
+		}
+	}
+
+	public void addAll(List<Message> messagesList) {
+		if (!messagesList.isEmpty()) {
+			String conversationUuid = messagesList.get(0).getConversation().getUuid();
+			if (!messages.containsKey(conversationUuid)) {
+				List<Message> list = Collections.synchronizedList(new LinkedList<Message>());
+				messages.put(conversationUuid, list);
+			}
+			synchronized (messages.get(conversationUuid)) {
+				messages.get(conversationUuid).addAll(messagesList);
+			}
+			decryptAllMessages();
+		}
+	}
+
+	public void onKeychainUnlocked() {
+		synchronized (keychainLockedLock) {
+			keychainLocked = false;
+		}
+		decryptAllMessages();
+	}
+
+	public void onKeychainLocked() {
+		synchronized (keychainLockedLock) {
+			keychainLocked = true;
+		}
+		xmppConnectionService.updateConversationUi();
+	}
+
+	public void onOpenPgpServiceBound() {
+		decryptAllMessages();
+	}
+
+	public boolean isRunning() {
+		synchronized (keychainLockedLock) {
+			return !keychainLocked;
+		}
+	}
+
+	private void store(Message message) {
+		if (messages.containsKey(message.getConversation().getUuid())) {
+			messages.get(message.getConversation().getUuid()).add(message);
+		} else {
+			List<Message> messageList = Collections.synchronizedList(new LinkedList<Message>());
+			messageList.add(message);
+			messages.put(message.getConversation().getUuid(), messageList);
+		}
+	}
+
+	private void decryptAllMessages() {
+		for (String uuid : messages.keySet()) {
+			decryptMessages(uuid);
+		}
+	}
+
+	private void decryptMessages(final String uuid) {
+		synchronized (decryptingMessages) {
+			Boolean decrypting = decryptingMessages.get(uuid);
+			if ((decrypting != null && !decrypting) || decrypting == null) {
+				decryptingMessages.put(uuid, true);
+				decryptMessage(uuid);
+			}
+		}
+	}
+
+	private void decryptMessage(final String uuid) {
+		Message message = null;
+		synchronized (messages.get(uuid)) {
+			while (!messages.get(uuid).isEmpty()) {
+				if (messages.get(uuid).get(0).getEncryption() == Message.ENCRYPTION_PGP) {
+					if (isRunning()) {
+						message = messages.get(uuid).remove(0);
+					}
+					break;
+				} else {
+					messages.get(uuid).remove(0);
+				}
+			}
+			if (message != null && xmppConnectionService.getPgpEngine() != null) {
+				xmppConnectionService.getPgpEngine().decrypt(message, new UiCallback<Message>() {
+
+					@Override
+					public void userInputRequried(PendingIntent pi, Message message) {
+						messages.get(uuid).add(0, message);
+						decryptingMessages.put(uuid, false);
+					}
+
+					@Override
+					public void success(Message message) {
+						xmppConnectionService.updateConversationUi();
+						decryptMessage(uuid);
+					}
+
+					@Override
+					public void error(int error, Message message) {
+						message.setEncryption(Message.ENCRYPTION_DECRYPTION_FAILED);
+						xmppConnectionService.updateConversationUi();
+						decryptMessage(uuid);
+					}
+				});
+			} else {
+				decryptingMessages.put(uuid, false);
+			}
+		}
+	}
+
+	private void decryptDirectly(final Message message) {
+		if (message.getEncryption() == Message.ENCRYPTION_PGP && xmppConnectionService.getPgpEngine() != null) {
+			xmppConnectionService.getPgpEngine().decrypt(message, new UiCallback<Message>() {
+
+				@Override
+				public void userInputRequried(PendingIntent pi, Message message) {
+					store(message);
+				}
+
+				@Override
+				public void success(Message message) {
+					xmppConnectionService.updateConversationUi();
+					xmppConnectionService.getNotificationService().updateNotification(false);
+				}
+
+				@Override
+				public void error(int error, Message message) {
+					message.setEncryption(Message.ENCRYPTION_DECRYPTION_FAILED);
+					xmppConnectionService.updateConversationUi();
+				}
+			});
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/PgpEngine.java b/src/main/java/de/thedevstack/conversationsplus/crypto/PgpEngine.java
index 08aa8272..8a5c6101 100644
--- a/src/main/java/de/thedevstack/conversationsplus/crypto/PgpEngine.java
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/PgpEngine.java
@@ -1,5 +1,13 @@
 package de.thedevstack.conversationsplus.crypto;
 
+import android.app.PendingIntent;
+import android.content.Intent;
+import android.net.Uri;
+
+import org.openintents.openpgp.OpenPgpSignatureResult;
+import org.openintents.openpgp.util.OpenPgpApi;
+import org.openintents.openpgp.util.OpenPgpApi.IOpenPgpCallback;
+
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.FileInputStream;
@@ -9,12 +17,9 @@ import java.io.InputStream;
 import java.io.OutputStream;
 import java.net.URL;
 
-import org.openintents.openpgp.OpenPgpSignatureResult;
-import org.openintents.openpgp.util.OpenPgpApi;
-import org.openintents.openpgp.util.OpenPgpApi.IOpenPgpCallback;
-
 import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
-import de.thedevstack.conversationsplus.persistance.FileBackend;
+import de.thedevstack.conversationsplus.utils.MessageUtil;
+import de.thedevstack.conversationsplus.utils.StreamUtil;
 import de.thedevstack.conversationsplus.R;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Contact;
@@ -22,13 +27,9 @@ import de.thedevstack.conversationsplus.entities.Conversation;
 import de.thedevstack.conversationsplus.entities.DownloadableFile;
 import de.thedevstack.conversationsplus.entities.Message;
 import de.thedevstack.conversationsplus.http.HttpConnectionManager;
+import de.thedevstack.conversationsplus.persistance.FileBackend;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
 import de.thedevstack.conversationsplus.ui.UiCallback;
-import de.thedevstack.conversationsplus.utils.MessageUtil;
-
-import android.app.PendingIntent;
-import android.content.Intent;
-import android.net.Uri;
 
 public class PgpEngine {
 	private OpenPgpApi api;
@@ -39,26 +40,24 @@ public class PgpEngine {
 		this.mXmppConnectionService = service;
 	}
 
-	public void decrypt(final Message message,
-			final UiCallback<Message> callback) {
+	public void decrypt(final Message message, final UiCallback<Message> callback) {
 		Intent params = new Intent();
 		params.setAction(OpenPgpApi.ACTION_DECRYPT_VERIFY);
-		params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, message
-				.getConversation().getAccount().getJid().toBareJid().toString());
+		final String uuid = message.getUuid();
 		if (message.getType() == Message.TYPE_TEXT) {
-			InputStream is = new ByteArrayInputStream(message.getBody()
-					.getBytes());
+			InputStream is = new ByteArrayInputStream(message.getBody().getBytes());
 			final OutputStream os = new ByteArrayOutputStream();
 			api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
 
 				@Override
 				public void onReturn(Intent result) {
-					switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
-							OpenPgpApi.RESULT_CODE_ERROR)) {
+					notifyPgpDecryptionService(message.getConversation().getAccount(), OpenPgpApi.ACTION_DECRYPT_VERIFY, result);
+					switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, OpenPgpApi.RESULT_CODE_ERROR)) {
 					case OpenPgpApi.RESULT_CODE_SUCCESS:
 						try {
 							os.flush();
-							if (message.getEncryption() == Message.ENCRYPTION_PGP) {
+							if (message.getEncryption() == Message.ENCRYPTION_PGP
+									&& message.getUuid().equals(uuid)) {
 								message.setBody(os.toString());
 								message.setEncryption(Message.ENCRYPTION_DECRYPTED);
 								final HttpConnectionManager manager = mXmppConnectionService.getHttpConnectionManager();
@@ -69,6 +68,7 @@ public class PgpEngine {
 										&& ConversationsPlusPreferences.autoAcceptFileSize() > 0) {
 									manager.createNewDownloadConnection(message);
 								}
+								mXmppConnectionService.updateMessage(message);
 								callback.success(message);
 							}
 						} catch (IOException e) {
@@ -99,6 +99,7 @@ public class PgpEngine {
 
 					@Override
 					public void onReturn(Intent result) {
+						notifyPgpDecryptionService(message.getConversation().getAccount(), OpenPgpApi.ACTION_DECRYPT_VERIFY, result);
 						switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
 								OpenPgpApi.RESULT_CODE_ERROR)) {
 						case OpenPgpApi.RESULT_CODE_SUCCESS:
@@ -131,21 +132,19 @@ public class PgpEngine {
 		}
 	}
 
-	public void encrypt(final Message message,
-			final UiCallback<Message> callback) {
-
+	public void encrypt(final Message message, final UiCallback<Message> callback) {
 		Intent params = new Intent();
 		params.setAction(OpenPgpApi.ACTION_ENCRYPT);
-		if (message.getConversation().getMode() == Conversation.MODE_SINGLE) {
-			long[] keys = { message.getConversation().getContact()
-					.getPgpKeyId() };
+		final Conversation conversation = message.getConversation();
+		if (conversation.getMode() == Conversation.MODE_SINGLE) {
+			long[] keys = {
+					conversation.getContact().getPgpKeyId(),
+					conversation.getAccount().getPgpId()
+			};
 			params.putExtra(OpenPgpApi.EXTRA_KEY_IDS, keys);
 		} else {
-			params.putExtra(OpenPgpApi.EXTRA_KEY_IDS, message.getConversation()
-					.getMucOptions().getPgpKeyIds());
+			params.putExtra(OpenPgpApi.EXTRA_KEY_IDS, conversation.getMucOptions().getPgpKeyIds());
 		}
-		params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, message
-				.getConversation().getAccount().getJid().toBareJid().toString());
 
 		if (!message.needsUploading()) {
 			params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
@@ -161,6 +160,7 @@ public class PgpEngine {
 
 				@Override
 				public void onReturn(Intent result) {
+					notifyPgpDecryptionService(message.getConversation().getAccount(), OpenPgpApi.ACTION_ENCRYPT, result);
 					switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
 							OpenPgpApi.RESULT_CODE_ERROR)) {
 					case OpenPgpApi.RESULT_CODE_SUCCESS:
@@ -198,15 +198,22 @@ public class PgpEngine {
 				DownloadableFile outputFile = FileBackend.getFile(message, false);
 				outputFile.getParentFile().mkdirs();
 				outputFile.createNewFile();
-				InputStream is = new FileInputStream(inputFile);
-				OutputStream os = new FileOutputStream(outputFile);
+				final InputStream is = new FileInputStream(inputFile);
+				final OutputStream os = new FileOutputStream(outputFile);
 				api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
 
 					@Override
 					public void onReturn(Intent result) {
+						notifyPgpDecryptionService(message.getConversation().getAccount(), OpenPgpApi.ACTION_ENCRYPT, result);
 						switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
 								OpenPgpApi.RESULT_CODE_ERROR)) {
 						case OpenPgpApi.RESULT_CODE_SUCCESS:
+							try {
+								os.flush();
+							} catch (IOException ignored) {
+								//ignored
+							}
+							StreamUtil.close(os);
 							callback.success(message);
 							break;
 						case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
@@ -249,10 +256,10 @@ public class PgpEngine {
 		Intent params = new Intent();
 		params.setAction(OpenPgpApi.ACTION_DECRYPT_VERIFY);
 		params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
-		params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, account.getJid().toBareJid().toString());
 		InputStream is = new ByteArrayInputStream(pgpSig.toString().getBytes());
 		ByteArrayOutputStream os = new ByteArrayOutputStream();
 		Intent result = api.executeApi(params, is, os);
+		notifyPgpDecryptionService(account, OpenPgpApi.ACTION_DECRYPT_VERIFY, result);
 		switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
 				OpenPgpApi.RESULT_CODE_ERROR)) {
 		case OpenPgpApi.RESULT_CODE_SUCCESS:
@@ -271,18 +278,45 @@ public class PgpEngine {
 		return 0;
 	}
 
+	public void chooseKey(final Account account, final UiCallback<Account> callback) {
+		Intent p = new Intent();
+		p.setAction(OpenPgpApi.ACTION_GET_SIGN_KEY_ID);
+		api.executeApiAsync(p, null, null, new IOpenPgpCallback() {
+
+			@Override
+			public void onReturn(Intent result) {
+				switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, 0)) {
+					case OpenPgpApi.RESULT_CODE_SUCCESS:
+						callback.success(account);
+						return;
+					case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
+						callback.userInputRequried((PendingIntent) result
+										.getParcelableExtra(OpenPgpApi.RESULT_INTENT),
+								account);
+						return;
+					case OpenPgpApi.RESULT_CODE_ERROR:
+						callback.error(R.string.openpgp_error, account);
+				}
+			}
+		});
+	}
+
 	public void generateSignature(final Account account, String status,
 			final UiCallback<Account> callback) {
+		if (account.getPgpId() == -1) {
+			return;
+		}
 		Intent params = new Intent();
+		params.setAction(OpenPgpApi.ACTION_CLEARTEXT_SIGN);
 		params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
-		params.setAction(OpenPgpApi.ACTION_SIGN);
-		params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, account.getJid().toBareJid().toString());
+		params.putExtra(OpenPgpApi.EXTRA_SIGN_KEY_ID, account.getPgpId());
 		InputStream is = new ByteArrayInputStream(status.getBytes());
 		final OutputStream os = new ByteArrayOutputStream();
 		api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
 
 			@Override
 			public void onReturn(Intent result) {
+				notifyPgpDecryptionService(account, OpenPgpApi.ACTION_SIGN, result);
 				switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, 0)) {
 				case OpenPgpApi.RESULT_CODE_SUCCESS:
 					StringBuilder signatureBuilder = new StringBuilder();
@@ -308,7 +342,7 @@ public class PgpEngine {
 						callback.error(R.string.openpgp_error, account);
 						return;
 					}
-					account.setKey("pgp_signature", signatureBuilder.toString());
+					account.setPgpSignature(signatureBuilder.toString());
 					callback.success(account);
 					return;
 				case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
@@ -327,8 +361,6 @@ public class PgpEngine {
 		Intent params = new Intent();
 		params.setAction(OpenPgpApi.ACTION_GET_KEY);
 		params.putExtra(OpenPgpApi.EXTRA_KEY_ID, contact.getPgpKeyId());
-		params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, contact.getAccount()
-				.getJid().toBareJid().toString());
 		api.executeApiAsync(params, null, null, new IOpenPgpCallback() {
 
 			@Override
@@ -353,8 +385,6 @@ public class PgpEngine {
 		Intent params = new Intent();
 		params.setAction(OpenPgpApi.ACTION_GET_KEY);
 		params.putExtra(OpenPgpApi.EXTRA_KEY_ID, contact.getPgpKeyId());
-		params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, contact.getAccount()
-				.getJid().toBareJid().toString());
 		Intent result = api.executeApi(params, null, null);
 		return (PendingIntent) result
 				.getParcelableExtra(OpenPgpApi.RESULT_INTENT);
@@ -364,9 +394,21 @@ public class PgpEngine {
 		Intent params = new Intent();
 		params.setAction(OpenPgpApi.ACTION_GET_KEY);
 		params.putExtra(OpenPgpApi.EXTRA_KEY_ID, pgpKeyId);
-		params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, account.getJid().toBareJid().toString());
 		Intent result = api.executeApi(params, null, null);
 		return (PendingIntent) result
 				.getParcelableExtra(OpenPgpApi.RESULT_INTENT);
 	}
+
+	private void notifyPgpDecryptionService(Account account, String action, final Intent result) {
+		switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, 0)) {
+			case OpenPgpApi.RESULT_CODE_SUCCESS:
+				if (OpenPgpApi.ACTION_SIGN.equals(action)) {
+					account.getPgpDecryptionService().onKeychainUnlocked();
+				}
+				break;
+			case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
+				account.getPgpDecryptionService().onKeychainLocked();
+				break;
+		}
+	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/XmppDomainVerifier.java b/src/main/java/de/thedevstack/conversationsplus/crypto/XmppDomainVerifier.java
new file mode 100644
index 00000000..c9f65a97
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/XmppDomainVerifier.java
@@ -0,0 +1,127 @@
+package de.thedevstack.conversationsplus.crypto;
+
+import android.util.Log;
+import android.util.Pair;
+
+import org.bouncycastle.asn1.ASN1Primitive;
+import org.bouncycastle.asn1.DERIA5String;
+import org.bouncycastle.asn1.DERTaggedObject;
+import org.bouncycastle.asn1.DERUTF8String;
+import org.bouncycastle.asn1.DLSequence;
+import org.bouncycastle.asn1.x500.RDN;
+import org.bouncycastle.asn1.x500.X500Name;
+import org.bouncycastle.asn1.x500.style.BCStyle;
+import org.bouncycastle.asn1.x500.style.IETFUtils;
+import org.bouncycastle.cert.jcajce.JcaX509CertificateHolder;
+
+import java.io.IOException;
+import java.security.cert.Certificate;
+import java.security.cert.X509Certificate;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+import javax.net.ssl.HostnameVerifier;
+import javax.net.ssl.SSLSession;
+
+public class XmppDomainVerifier implements HostnameVerifier {
+
+	private static final String LOGTAG = "XmppDomainVerifier";
+
+	private final String SRVName = "1.3.6.1.5.5.7.8.7";
+	private final String xmppAddr = "1.3.6.1.5.5.7.8.5";
+
+	@Override
+	public boolean verify(String domain, SSLSession sslSession) {
+		try {
+			Certificate[] chain = sslSession.getPeerCertificates();
+			if (chain.length == 0 || !(chain[0] instanceof X509Certificate)) {
+				return false;
+			}
+			X509Certificate certificate = (X509Certificate) chain[0];
+			Collection<List<?>> alternativeNames = certificate.getSubjectAlternativeNames();
+			List<String> xmppAddrs = new ArrayList<>();
+			List<String> srvNames = new ArrayList<>();
+			List<String> domains = new ArrayList<>();
+			if (alternativeNames != null) {
+				for (List<?> san : alternativeNames) {
+					Integer type = (Integer) san.get(0);
+					if (type == 0) {
+						Pair<String, String> otherName = parseOtherName((byte[]) san.get(1));
+						if (otherName != null) {
+							switch (otherName.first) {
+								case SRVName:
+									srvNames.add(otherName.second);
+									break;
+								case xmppAddr:
+									xmppAddrs.add(otherName.second);
+									break;
+								default:
+									Log.d(LOGTAG, "oid: " + otherName.first + " value: " + otherName.second);
+							}
+						}
+					} else if (type == 2) {
+						Object value = san.get(1);
+						if (value instanceof String) {
+							domains.add((String) value);
+						}
+					}
+				}
+			}
+			if (srvNames.size() == 0 && xmppAddrs.size() == 0 && domains.size() == 0) {
+				X500Name x500name = new JcaX509CertificateHolder(certificate).getSubject();
+				RDN[] rdns = x500name.getRDNs(BCStyle.CN);
+				for (int i = 0; i < rdns.length; ++i) {
+					domains.add(IETFUtils.valueToString(x500name.getRDNs(BCStyle.CN)[i].getFirst().getValue()));
+				}
+			}
+			Log.d(LOGTAG, "searching for " + domain + " in srvNames: " + srvNames + " xmppAddrs: " + xmppAddrs + " domains:" + domains);
+			return xmppAddrs.contains(domain) || srvNames.contains("_xmpp-client." + domain) || matchDomain(domain, domains);
+		} catch (Exception e) {
+			return false;
+		}
+	}
+
+	private static Pair<String, String> parseOtherName(byte[] otherName) {
+		try {
+			ASN1Primitive asn1Primitive = ASN1Primitive.fromByteArray(otherName);
+			if (asn1Primitive instanceof DERTaggedObject) {
+				ASN1Primitive inner = ((DERTaggedObject) asn1Primitive).getObject();
+				if (inner instanceof DLSequence) {
+					DLSequence sequence = (DLSequence) inner;
+					if (sequence.size() >= 2 && sequence.getObjectAt(1) instanceof DERTaggedObject) {
+						String oid = sequence.getObjectAt(0).toString();
+						ASN1Primitive value = ((DERTaggedObject) sequence.getObjectAt(1)).getObject();
+						if (value instanceof DERUTF8String) {
+							return new Pair<>(oid, ((DERUTF8String) value).getString());
+						} else if (value instanceof DERIA5String) {
+							return new Pair<>(oid, ((DERIA5String) value).getString());
+						}
+					}
+				}
+			}
+			return null;
+		} catch (IOException e) {
+			return null;
+		}
+	}
+
+	private static boolean matchDomain(String needle, List<String> haystack) {
+		for (String entry : haystack) {
+			if (entry.startsWith("*.")) {
+				int i = needle.indexOf('.');
+				Log.d(LOGTAG, "comparing " + needle.substring(i) + " and " + entry.substring(1));
+				if (i != -1 && needle.substring(i).equals(entry.substring(1))) {
+					Log.d(LOGTAG, "domain " + needle + " matched " + entry);
+					return true;
+				}
+			} else {
+				if (entry.equals(needle)) {
+					Log.d(LOGTAG, "domain " + needle + " matched " + entry);
+					return true;
+				}
+			}
+		}
+		return false;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/AxolotlService.java b/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/AxolotlService.java
new file mode 100644
index 00000000..987cf940
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/AxolotlService.java
@@ -0,0 +1,110 @@
+package de.thedevstack.conversationsplus.crypto.axolotl;
+
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+
+import org.whispersystems.libaxolotl.AxolotlAddress;
+import org.whispersystems.libaxolotl.IdentityKey;
+import org.whispersystems.libaxolotl.state.PreKeyRecord;
+import org.whispersystems.libaxolotl.state.SignedPreKeyRecord;
+
+import java.security.cert.X509Certificate;
+import java.util.Set;
+
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.xmpp.OnAdvancedStreamFeaturesLoaded;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+/**
+ * Created by tzur on 02.03.2016.
+ */
+public interface AxolotlService extends OnAdvancedStreamFeaturesLoaded {
+
+	String LOGPREFIX = "AxolotlService";
+
+	String PEP_PREFIX = "eu.siacs.conversations.axolotl";
+	String PEP_DEVICE_LIST = PEP_PREFIX + ".devicelist";
+	String PEP_BUNDLES = PEP_PREFIX + ".bundles";
+	String PEP_VERIFICATION = PEP_PREFIX + ".verification";
+
+	enum FetchStatus {
+		PENDING,
+		SUCCESS,
+		SUCCESS_VERIFIED,
+		TIMEOUT,
+		ERROR
+	}
+
+	boolean fetchMapHasErrors(Contact contact);
+
+	String getOwnFingerprint();
+
+	Set<IdentityKey> getKeysWithTrust(XmppAxolotlSession.Trust trust);
+
+	Set<IdentityKey> getKeysWithTrust(XmppAxolotlSession.Trust trust, Contact contact);
+
+	long getNumTrustedKeys(Contact contact);
+
+	Set<String> getFingerprintsForOwnSessions();
+
+	Set<String> getFingerprintsForContact(Contact contact);
+
+	boolean isPepBroken();
+
+	void regenerateKeys(boolean wipeOther);
+
+	int getOwnDeviceId();
+
+	Set<Integer> getOwnDeviceIds();
+
+	void registerDevices(Jid jid, @NonNull Set<Integer> deviceIds);
+
+	void wipeOtherPepDevices();
+
+	void purgeKey(String fingerprint);
+
+	void publishOwnDeviceIdIfNeeded();
+
+	void publishOwnDeviceId(Set<Integer> deviceIds);
+
+	void publishDeviceVerificationAndBundle(SignedPreKeyRecord signedPreKeyRecord,
+											Set<PreKeyRecord> preKeyRecords,
+											boolean announceAfter,
+											boolean wipe);
+
+	void publishBundlesIfNeeded(boolean announce, boolean wipe);
+
+	boolean isContactAxolotlCapable(Contact contact);
+
+	XmppAxolotlSession.Trust getFingerprintTrust(String fingerprint);
+
+	X509Certificate getFingerprintCertificate(String fingerprint);
+
+	void setFingerprintTrust(String fingerprint, XmppAxolotlSession.Trust trust);
+
+	Set<AxolotlAddress> findDevicesWithoutSession(Conversation conversation);
+
+	Set<AxolotlAddress> findDevicesWithoutSession(Jid contactJid);
+
+	boolean createSessionsIfNeeded(Conversation conversation);
+
+	boolean trustedSessionVerified(Conversation conversation);
+
+	boolean hasPendingKeyFetches(Account account, Contact contact);
+
+	@Nullable
+	XmppAxolotlMessage encrypt(Message message);
+
+	void preparePayloadMessage(Message message, boolean delay);
+
+	void prepareKeyTransportMessage(Contact contact, OnMessageCreatedCallback onMessageCreatedCallback);
+
+	XmppAxolotlMessage fetchAxolotlMessageFromCache(Message message);
+
+	XmppAxolotlMessage.XmppAxolotlPlaintextMessage processReceivingPayloadMessage(XmppAxolotlMessage message);
+
+	XmppAxolotlMessage.XmppAxolotlKeyTransportMessage processReceivingKeyTransportMessage(XmppAxolotlMessage message);
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/AxolotlServiceImpl.java b/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/AxolotlServiceImpl.java
new file mode 100644
index 00000000..5a05b34c
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/AxolotlServiceImpl.java
@@ -0,0 +1,1021 @@
+package de.thedevstack.conversationsplus.crypto.axolotl;
+
+import android.os.Bundle;
+import android.security.KeyChain;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.util.Log;
+import android.util.Pair;
+
+import org.bouncycastle.jce.provider.BouncyCastleProvider;
+import org.whispersystems.libaxolotl.AxolotlAddress;
+import org.whispersystems.libaxolotl.IdentityKey;
+import org.whispersystems.libaxolotl.IdentityKeyPair;
+import org.whispersystems.libaxolotl.InvalidKeyException;
+import org.whispersystems.libaxolotl.InvalidKeyIdException;
+import org.whispersystems.libaxolotl.SessionBuilder;
+import org.whispersystems.libaxolotl.UntrustedIdentityException;
+import org.whispersystems.libaxolotl.ecc.ECPublicKey;
+import org.whispersystems.libaxolotl.state.PreKeyBundle;
+import org.whispersystems.libaxolotl.state.PreKeyRecord;
+import org.whispersystems.libaxolotl.state.SignedPreKeyRecord;
+import org.whispersystems.libaxolotl.util.KeyHelper;
+
+import java.security.PrivateKey;
+import java.security.Security;
+import java.security.Signature;
+import java.security.cert.X509Certificate;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Random;
+import java.util.Set;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.parser.IqParser;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.utils.CryptoHelper;
+import de.thedevstack.conversationsplus.utils.SerialSingleThreadExecutor;
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.OnIqPacketReceived;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+import de.thedevstack.conversationsplus.xmpp.stanzas.IqPacket;
+
+public class AxolotlServiceImpl implements AxolotlService {
+
+	public static final int NUM_KEYS_TO_PUBLISH = 100;
+	public static final int publishTriesThreshold = 3;
+
+	private final Account account;
+	private final XmppConnectionService mXmppConnectionService;
+	private final SQLiteAxolotlStore axolotlStore;
+	private final SessionMap sessions;
+	private final Map<Jid, Set<Integer>> deviceIds;
+	private final Map<String, XmppAxolotlMessage> messageCache;
+	private final FetchStatusMap fetchStatusMap;
+	private final SerialSingleThreadExecutor executor;
+	private int numPublishTriesOnEmptyPep = 0;
+	private boolean pepBroken = false;
+
+	@Override
+	public void onAdvancedStreamFeaturesAvailable(Account account) {
+		if (account.getXmppConnection() != null && account.getXmppConnection().getFeatures().pep()) {
+			publishBundlesIfNeeded(true, false);
+		} else {
+			Log.d(Config.LOGTAG,account.getJid().toBareJid()+": skipping OMEMO initialization");
+		}
+	}
+
+	@Override
+	public boolean fetchMapHasErrors(Contact contact) {
+		Jid jid = contact.getJid().toBareJid();
+		if (deviceIds.get(jid) != null) {
+			for (Integer foreignId : this.deviceIds.get(jid)) {
+				AxolotlAddress address = new AxolotlAddress(jid.toString(), foreignId);
+				if (fetchStatusMap.getAll(address).containsValue(FetchStatus.ERROR)) {
+					return true;
+				}
+			}
+		}
+		return false;
+	}
+
+	private static class AxolotlAddressMap<T> {
+		protected Map<String, Map<Integer, T>> map;
+		protected final Object MAP_LOCK = new Object();
+
+		public AxolotlAddressMap() {
+			this.map = new HashMap<>();
+		}
+
+		public void put(AxolotlAddress address, T value) {
+			synchronized (MAP_LOCK) {
+				Map<Integer, T> devices = map.get(address.getName());
+				if (devices == null) {
+					devices = new HashMap<>();
+					map.put(address.getName(), devices);
+				}
+				devices.put(address.getDeviceId(), value);
+			}
+		}
+
+		public T get(AxolotlAddress address) {
+			synchronized (MAP_LOCK) {
+				Map<Integer, T> devices = map.get(address.getName());
+				if (devices == null) {
+					return null;
+				}
+				return devices.get(address.getDeviceId());
+			}
+		}
+
+		public Map<Integer, T> getAll(AxolotlAddress address) {
+			synchronized (MAP_LOCK) {
+				Map<Integer, T> devices = map.get(address.getName());
+				if (devices == null) {
+					return new HashMap<>();
+				}
+				return devices;
+			}
+		}
+
+		public boolean hasAny(AxolotlAddress address) {
+			synchronized (MAP_LOCK) {
+				Map<Integer, T> devices = map.get(address.getName());
+				return devices != null && !devices.isEmpty();
+			}
+		}
+
+		public void clear() {
+			map.clear();
+		}
+
+	}
+
+	private static class SessionMap extends AxolotlAddressMap<XmppAxolotlSession> {
+		private final XmppConnectionService xmppConnectionService;
+		private final Account account;
+
+		public SessionMap(XmppConnectionService service, SQLiteAxolotlStore store, Account account) {
+			super();
+			this.xmppConnectionService = service;
+			this.account = account;
+			this.fillMap(store);
+		}
+
+		private void putDevicesForJid(String bareJid, List<Integer> deviceIds, SQLiteAxolotlStore store) {
+			for (Integer deviceId : deviceIds) {
+				AxolotlAddress axolotlAddress = new AxolotlAddress(bareJid, deviceId);
+				Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Building session for remote address: " + axolotlAddress.toString());
+				IdentityKey identityKey = store.loadSession(axolotlAddress).getSessionState().getRemoteIdentityKey();
+				if(Config.X509_VERIFICATION) {
+					X509Certificate certificate = store.getFingerprintCertificate(identityKey.getFingerprint().replaceAll("\\s", ""));
+					if (certificate != null) {
+						Bundle information = CryptoHelper.extractCertificateInformation(certificate);
+						try {
+							final String cn = information.getString("subject_cn");
+							final Jid jid = Jid.fromString(bareJid);
+							Log.d(Config.LOGTAG,"setting common name for "+jid+" to "+cn);
+							account.getRoster().getContact(jid).setCommonName(cn);
+						} catch (final InvalidJidException ignored) {
+							//ignored
+						}
+					}
+				}
+				this.put(axolotlAddress, new XmppAxolotlSession(account, store, axolotlAddress, identityKey));
+			}
+		}
+
+		private void fillMap(SQLiteAxolotlStore store) {
+			List<Integer> deviceIds = store.getSubDeviceSessions(account.getJid().toBareJid().toString());
+			putDevicesForJid(account.getJid().toBareJid().toString(), deviceIds, store);
+			for (Contact contact : account.getRoster().getContacts()) {
+				Jid bareJid = contact.getJid().toBareJid();
+				String address = bareJid.toString();
+				deviceIds = store.getSubDeviceSessions(address);
+				putDevicesForJid(address, deviceIds, store);
+			}
+
+		}
+
+		@Override
+		public void put(AxolotlAddress address, XmppAxolotlSession value) {
+			super.put(address, value);
+			value.setNotFresh();
+			xmppConnectionService.syncRosterToDisk(account);
+		}
+
+		public void put(XmppAxolotlSession session) {
+			this.put(session.getRemoteAddress(), session);
+		}
+	}
+
+	private static class FetchStatusMap extends AxolotlAddressMap<FetchStatus> {
+
+	}
+
+	public static String getLogprefix(Account account) {
+		return LOGPREFIX + " (" + account.getJid().toBareJid().toString() + "): ";
+	}
+
+	public AxolotlServiceImpl(Account account, XmppConnectionService connectionService) {
+		if (Security.getProvider("BC") == null) {
+			Security.addProvider(new BouncyCastleProvider());
+		}
+		this.mXmppConnectionService = connectionService;
+		this.account = account;
+		this.axolotlStore = new SQLiteAxolotlStore(this.account, this.mXmppConnectionService);
+		this.deviceIds = new HashMap<>();
+		this.messageCache = new HashMap<>();
+		this.sessions = new SessionMap(mXmppConnectionService, axolotlStore, account);
+		this.fetchStatusMap = new FetchStatusMap();
+		this.executor = new SerialSingleThreadExecutor();
+	}
+
+	@Override
+	public String getOwnFingerprint() {
+		return axolotlStore.getIdentityKeyPair().getPublicKey().getFingerprint().replaceAll("\\s", "");
+	}
+
+	@Override
+	public Set<IdentityKey> getKeysWithTrust(XmppAxolotlSession.Trust trust) {
+		return axolotlStore.getContactKeysWithTrust(account.getJid().toBareJid().toString(), trust);
+	}
+
+	@Override
+	public Set<IdentityKey> getKeysWithTrust(XmppAxolotlSession.Trust trust, Contact contact) {
+		return axolotlStore.getContactKeysWithTrust(contact.getJid().toBareJid().toString(), trust);
+	}
+
+	@Override
+	public long getNumTrustedKeys(Contact contact) {
+		return axolotlStore.getContactNumTrustedKeys(contact.getJid().toBareJid().toString());
+	}
+
+	private AxolotlAddress getAddressForJid(Jid jid) {
+		return new AxolotlAddress(jid.toString(), 0);
+	}
+
+	private Set<XmppAxolotlSession> findOwnSessions() {
+		AxolotlAddress ownAddress = getAddressForJid(account.getJid().toBareJid());
+		return new HashSet<>(this.sessions.getAll(ownAddress).values());
+	}
+
+	private Set<XmppAxolotlSession> findSessionsforContact(Contact contact) {
+		AxolotlAddress contactAddress = getAddressForJid(contact.getJid());
+		return new HashSet<>(this.sessions.getAll(contactAddress).values());
+	}
+
+	@Override
+	public Set<String> getFingerprintsForOwnSessions() {
+		Set<String> fingerprints = new HashSet<>();
+		for (XmppAxolotlSession session : findOwnSessions()) {
+			fingerprints.add(session.getFingerprint());
+		}
+		return fingerprints;
+	}
+
+	@Override
+	public Set<String> getFingerprintsForContact(final Contact contact) {
+		Set<String> fingerprints = new HashSet<>();
+		for (XmppAxolotlSession session : findSessionsforContact(contact)) {
+			fingerprints.add(session.getFingerprint());
+		}
+		return fingerprints;
+	}
+
+	private boolean hasAny(Contact contact) {
+		AxolotlAddress contactAddress = getAddressForJid(contact.getJid());
+		return sessions.hasAny(contactAddress);
+	}
+
+	@Override
+	public boolean isPepBroken() {
+		return this.pepBroken;
+	}
+
+	@Override
+	public void regenerateKeys(boolean wipeOther) {
+		axolotlStore.regenerate();
+		sessions.clear();
+		fetchStatusMap.clear();
+		publishBundlesIfNeeded(true, wipeOther);
+	}
+
+	@Override
+	public int getOwnDeviceId() {
+		return axolotlStore.getLocalRegistrationId();
+	}
+
+	@Override
+	public Set<Integer> getOwnDeviceIds() {
+		return this.deviceIds.get(account.getJid().toBareJid());
+	}
+
+	private void setTrustOnSessions(final Jid jid, @NonNull final Set<Integer> deviceIds,
+	                                final XmppAxolotlSession.Trust from,
+	                                final XmppAxolotlSession.Trust to) {
+		for (Integer deviceId : deviceIds) {
+			AxolotlAddress address = new AxolotlAddress(jid.toBareJid().toString(), deviceId);
+			XmppAxolotlSession session = sessions.get(address);
+			if (session != null && session.getFingerprint() != null
+					&& session.getTrust() == from) {
+				session.setTrust(to);
+			}
+		}
+	}
+
+	@Override
+	public void registerDevices(final Jid jid, @NonNull final Set<Integer> deviceIds) {
+		if (jid.toBareJid().equals(account.getJid().toBareJid())) {
+			if (!deviceIds.isEmpty()) {
+				Log.d(Config.LOGTAG, getLogprefix(account) + "Received non-empty own device list. Resetting publish attemps and pepBroken status.");
+				pepBroken = false;
+				numPublishTriesOnEmptyPep = 0;
+			}
+			if (deviceIds.contains(getOwnDeviceId())) {
+				deviceIds.remove(getOwnDeviceId());
+			} else {
+				publishOwnDeviceId(deviceIds);
+			}
+			for (Integer deviceId : deviceIds) {
+				AxolotlAddress ownDeviceAddress = new AxolotlAddress(jid.toBareJid().toString(), deviceId);
+				if (sessions.get(ownDeviceAddress) == null) {
+					buildSessionFromPEP(ownDeviceAddress);
+				}
+			}
+		}
+		Set<Integer> expiredDevices = new HashSet<>(axolotlStore.getSubDeviceSessions(jid.toBareJid().toString()));
+		expiredDevices.removeAll(deviceIds);
+		setTrustOnSessions(jid, expiredDevices, XmppAxolotlSession.Trust.TRUSTED,
+				XmppAxolotlSession.Trust.INACTIVE_TRUSTED);
+		setTrustOnSessions(jid, expiredDevices, XmppAxolotlSession.Trust.TRUSTED_X509,
+				XmppAxolotlSession.Trust.INACTIVE_TRUSTED_X509);
+		setTrustOnSessions(jid, expiredDevices, XmppAxolotlSession.Trust.UNDECIDED,
+				XmppAxolotlSession.Trust.INACTIVE_UNDECIDED);
+		setTrustOnSessions(jid, expiredDevices, XmppAxolotlSession.Trust.UNTRUSTED,
+				XmppAxolotlSession.Trust.INACTIVE_UNTRUSTED);
+		Set<Integer> newDevices = new HashSet<>(deviceIds);
+		setTrustOnSessions(jid, newDevices, XmppAxolotlSession.Trust.INACTIVE_TRUSTED,
+				XmppAxolotlSession.Trust.TRUSTED);
+		setTrustOnSessions(jid, newDevices, XmppAxolotlSession.Trust.INACTIVE_TRUSTED_X509,
+				XmppAxolotlSession.Trust.TRUSTED_X509);
+		setTrustOnSessions(jid, newDevices, XmppAxolotlSession.Trust.INACTIVE_UNDECIDED,
+				XmppAxolotlSession.Trust.UNDECIDED);
+		setTrustOnSessions(jid, newDevices, XmppAxolotlSession.Trust.INACTIVE_UNTRUSTED,
+				XmppAxolotlSession.Trust.UNTRUSTED);
+		this.deviceIds.put(jid, deviceIds);
+		mXmppConnectionService.keyStatusUpdated(null);
+	}
+
+	@Override
+	public void wipeOtherPepDevices() {
+		if (pepBroken) {
+			Log.d(Config.LOGTAG, getLogprefix(account) + "wipeOtherPepDevices called, but PEP is broken. Ignoring... ");
+			return;
+		}
+		Set<Integer> deviceIds = new HashSet<>();
+		deviceIds.add(getOwnDeviceId());
+		IqPacket publish = mXmppConnectionService.getIqGenerator().publishDeviceIds(deviceIds);
+		Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Wiping all other devices from Pep:" + publish);
+		mXmppConnectionService.sendIqPacket(account, publish, new OnIqPacketReceived() {
+			@Override
+			public void onIqPacketReceived(Account account, IqPacket packet) {
+				// TODO: implement this!
+			}
+		});
+	}
+
+	@Override
+	public void purgeKey(final String fingerprint) {
+		axolotlStore.setFingerprintTrust(fingerprint.replaceAll("\\s", ""), XmppAxolotlSession.Trust.COMPROMISED);
+	}
+
+	@Override
+	public void publishOwnDeviceIdIfNeeded() {
+		if (pepBroken) {
+			Log.d(Config.LOGTAG, getLogprefix(account) + "publishOwnDeviceIdIfNeeded called, but PEP is broken. Ignoring... ");
+			return;
+		}
+		IqPacket packet = mXmppConnectionService.getIqGenerator().retrieveDeviceIds(account.getJid().toBareJid());
+		mXmppConnectionService.sendIqPacket(account, packet, new OnIqPacketReceived() {
+			@Override
+			public void onIqPacketReceived(Account account, IqPacket packet) {
+				if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
+					Log.d(Config.LOGTAG, getLogprefix(account) + "Timeout received while retrieving own Device Ids.");
+				} else {
+					Element item = mXmppConnectionService.getIqParser().getItem(packet);
+					Set<Integer> deviceIds = mXmppConnectionService.getIqParser().deviceIds(item);
+					if (!deviceIds.contains(getOwnDeviceId())) {
+						publishOwnDeviceId(deviceIds);
+					}
+				}
+			}
+		});
+	}
+
+	@Override
+	public void publishOwnDeviceId(Set<Integer> deviceIds) {
+		Set<Integer> deviceIdsCopy = new HashSet<>(deviceIds);
+		if (!deviceIdsCopy.contains(getOwnDeviceId())) {
+			Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Own device " + getOwnDeviceId() + " not in PEP devicelist.");
+			if (deviceIdsCopy.isEmpty()) {
+				if (numPublishTriesOnEmptyPep >= publishTriesThreshold) {
+					Log.w(Config.LOGTAG, getLogprefix(account) + "Own device publish attempt threshold exceeded, aborting...");
+					pepBroken = true;
+					return;
+				} else {
+					numPublishTriesOnEmptyPep++;
+					Log.w(Config.LOGTAG, getLogprefix(account) + "Own device list empty, attempting to publish (try " + numPublishTriesOnEmptyPep + ")");
+				}
+			} else {
+				numPublishTriesOnEmptyPep = 0;
+			}
+			deviceIdsCopy.add(getOwnDeviceId());
+			IqPacket publish = mXmppConnectionService.getIqGenerator().publishDeviceIds(deviceIdsCopy);
+			mXmppConnectionService.sendIqPacket(account, publish, new OnIqPacketReceived() {
+				@Override
+				public void onIqPacketReceived(Account account, IqPacket packet) {
+					if (packet.getType() != IqPacket.TYPE.RESULT) {
+						Log.d(Config.LOGTAG, getLogprefix(account) + "Error received while publishing own device id" + packet.findChild("error"));
+					}
+				}
+			});
+		}
+	}
+
+	@Override
+	public void publishDeviceVerificationAndBundle(final SignedPreKeyRecord signedPreKeyRecord,
+												   final Set<PreKeyRecord> preKeyRecords,
+												   final boolean announceAfter,
+												   final boolean wipe) {
+		try {
+			IdentityKey axolotlPublicKey = axolotlStore.getIdentityKeyPair().getPublicKey();
+			PrivateKey x509PrivateKey = KeyChain.getPrivateKey(mXmppConnectionService, account.getPrivateKeyAlias());
+			X509Certificate[] chain = KeyChain.getCertificateChain(mXmppConnectionService, account.getPrivateKeyAlias());
+			Signature verifier = Signature.getInstance("sha256WithRSA");
+			verifier.initSign(x509PrivateKey,mXmppConnectionService.getRNG());
+			verifier.update(axolotlPublicKey.serialize());
+			byte[] signature = verifier.sign();
+			IqPacket packet = mXmppConnectionService.getIqGenerator().publishVerification(signature, chain, getOwnDeviceId());
+			Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + ": publish verification for device "+getOwnDeviceId());
+			mXmppConnectionService.sendIqPacket(account, packet, new OnIqPacketReceived() {
+				@Override
+				public void onIqPacketReceived(Account account, IqPacket packet) {
+					publishDeviceBundle(signedPreKeyRecord, preKeyRecords, announceAfter, wipe);
+				}
+			});
+		} catch (Exception  e) {
+			e.printStackTrace();
+		}
+	}
+
+	@Override
+	public void publishBundlesIfNeeded(final boolean announce, final boolean wipe) {
+		if (pepBroken) {
+			Log.d(Config.LOGTAG, getLogprefix(account) + "publishBundlesIfNeeded called, but PEP is broken. Ignoring... ");
+			return;
+		}
+		IqPacket packet = mXmppConnectionService.getIqGenerator().retrieveBundlesForDevice(account.getJid().toBareJid(), getOwnDeviceId());
+		mXmppConnectionService.sendIqPacket(account, packet, new OnIqPacketReceived() {
+			@Override
+			public void onIqPacketReceived(Account account, IqPacket packet) {
+
+				if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
+					return; //ignore timeout. do nothing
+				}
+
+				if (packet.getType() == IqPacket.TYPE.ERROR) {
+					Element error = packet.findChild("error");
+					if (error == null || !error.hasChild("item-not-found")) {
+						pepBroken = true;
+						Log.w(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "request for device bundles came back with something other than item-not-found" + packet);
+						return;
+					}
+				}
+
+				PreKeyBundle bundle = mXmppConnectionService.getIqParser().bundle(packet);
+				Map<Integer, ECPublicKey> keys = mXmppConnectionService.getIqParser().preKeyPublics(packet);
+				boolean flush = false;
+				if (bundle == null) {
+					Log.w(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Received invalid bundle:" + packet);
+					bundle = new PreKeyBundle(-1, -1, -1, null, -1, null, null, null);
+					flush = true;
+				}
+				if (keys == null) {
+					Log.w(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Received invalid prekeys:" + packet);
+				}
+				try {
+					boolean changed = false;
+					// Validate IdentityKey
+					IdentityKeyPair identityKeyPair = axolotlStore.getIdentityKeyPair();
+					if (flush || !identityKeyPair.getPublicKey().equals(bundle.getIdentityKey())) {
+						Log.i(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Adding own IdentityKey " + identityKeyPair.getPublicKey() + " to PEP.");
+						changed = true;
+					}
+
+					// Validate signedPreKeyRecord + ID
+					SignedPreKeyRecord signedPreKeyRecord;
+					int numSignedPreKeys = axolotlStore.loadSignedPreKeys().size();
+					try {
+						signedPreKeyRecord = axolotlStore.loadSignedPreKey(bundle.getSignedPreKeyId());
+						if (flush
+								|| !bundle.getSignedPreKey().equals(signedPreKeyRecord.getKeyPair().getPublicKey())
+								|| !Arrays.equals(bundle.getSignedPreKeySignature(), signedPreKeyRecord.getSignature())) {
+							Log.i(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Adding new signedPreKey with ID " + (numSignedPreKeys + 1) + " to PEP.");
+							signedPreKeyRecord = KeyHelper.generateSignedPreKey(identityKeyPair, numSignedPreKeys + 1);
+							axolotlStore.storeSignedPreKey(signedPreKeyRecord.getId(), signedPreKeyRecord);
+							changed = true;
+						}
+					} catch (InvalidKeyIdException e) {
+						Log.i(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Adding new signedPreKey with ID " + (numSignedPreKeys + 1) + " to PEP.");
+						signedPreKeyRecord = KeyHelper.generateSignedPreKey(identityKeyPair, numSignedPreKeys + 1);
+						axolotlStore.storeSignedPreKey(signedPreKeyRecord.getId(), signedPreKeyRecord);
+						changed = true;
+					}
+
+					// Validate PreKeys
+					Set<PreKeyRecord> preKeyRecords = new HashSet<>();
+					if (keys != null) {
+						for (Integer id : keys.keySet()) {
+							try {
+								PreKeyRecord preKeyRecord = axolotlStore.loadPreKey(id);
+								if (preKeyRecord.getKeyPair().getPublicKey().equals(keys.get(id))) {
+									preKeyRecords.add(preKeyRecord);
+								}
+							} catch (InvalidKeyIdException ignored) {
+							}
+						}
+					}
+					int newKeys = NUM_KEYS_TO_PUBLISH - preKeyRecords.size();
+					if (newKeys > 0) {
+						List<PreKeyRecord> newRecords = KeyHelper.generatePreKeys(
+								axolotlStore.getCurrentPreKeyId() + 1, newKeys);
+						preKeyRecords.addAll(newRecords);
+						for (PreKeyRecord record : newRecords) {
+							axolotlStore.storePreKey(record.getId(), record);
+						}
+						changed = true;
+						Log.i(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Adding " + newKeys + " new preKeys to PEP.");
+					}
+
+
+					if (changed) {
+						if (account.getPrivateKeyAlias() != null && Config.X509_VERIFICATION) {
+							mXmppConnectionService.publishDisplayName(account);
+							publishDeviceVerificationAndBundle(signedPreKeyRecord, preKeyRecords, announce, wipe);
+						} else {
+							publishDeviceBundle(signedPreKeyRecord, preKeyRecords, announce, wipe);
+						}
+					} else {
+						Log.d(Config.LOGTAG, getLogprefix(account) + "Bundle " + getOwnDeviceId() + " in PEP was current");
+						if (wipe) {
+							wipeOtherPepDevices();
+						} else if (announce) {
+							Log.d(Config.LOGTAG, getLogprefix(account) + "Announcing device " + getOwnDeviceId());
+							publishOwnDeviceIdIfNeeded();
+						}
+					}
+				} catch (InvalidKeyException e) {
+					Log.e(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Failed to publish bundle " + getOwnDeviceId() + ", reason: " + e.getMessage());
+				}
+			}
+		});
+	}
+
+	private void publishDeviceBundle(SignedPreKeyRecord signedPreKeyRecord,
+									 Set<PreKeyRecord> preKeyRecords,
+									 final boolean announceAfter,
+									 final boolean wipe) {
+		IqPacket publish = mXmppConnectionService.getIqGenerator().publishBundles(
+				signedPreKeyRecord, axolotlStore.getIdentityKeyPair().getPublicKey(),
+				preKeyRecords, getOwnDeviceId());
+		Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + ": Bundle " + getOwnDeviceId() + " in PEP not current. Publishing: " + publish);
+		mXmppConnectionService.sendIqPacket(account, publish, new OnIqPacketReceived() {
+			@Override
+			public void onIqPacketReceived(Account account, IqPacket packet) {
+				if (packet.getType() == IqPacket.TYPE.RESULT) {
+					Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Successfully published bundle. ");
+					if (wipe) {
+						wipeOtherPepDevices();
+					} else if (announceAfter) {
+						Log.d(Config.LOGTAG, getLogprefix(account) + "Announcing device " + getOwnDeviceId());
+						publishOwnDeviceIdIfNeeded();
+					}
+				} else {
+					Log.d(Config.LOGTAG, getLogprefix(account) + "Error received while publishing bundle: " + packet.findChild("error"));
+				}
+			}
+		});
+	}
+
+	@Override
+	public boolean isContactAxolotlCapable(Contact contact) {
+		Jid jid = contact.getJid().toBareJid();
+		return hasAny(contact) ||
+				(deviceIds.containsKey(jid) && !deviceIds.get(jid).isEmpty());
+	}
+
+	@Override
+	public XmppAxolotlSession.Trust getFingerprintTrust(String fingerprint) {
+		return axolotlStore.getFingerprintTrust(fingerprint);
+	}
+
+	@Override
+	public X509Certificate getFingerprintCertificate(String fingerprint) {
+		return axolotlStore.getFingerprintCertificate(fingerprint);
+	}
+
+	@Override
+	public void setFingerprintTrust(String fingerprint, XmppAxolotlSession.Trust trust) {
+		axolotlStore.setFingerprintTrust(fingerprint, trust);
+	}
+
+	private void verifySessionWithPEP(final XmppAxolotlSession session) {
+		Log.d(Config.LOGTAG, "trying to verify fresh session (" + session.getRemoteAddress().getName() + ") with pep");
+		final AxolotlAddress address = session.getRemoteAddress();
+		final IdentityKey identityKey = session.getIdentityKey();
+		try {
+			IqPacket packet = mXmppConnectionService.getIqGenerator().retrieveVerificationForDevice(Jid.fromString(address.getName()), address.getDeviceId());
+			mXmppConnectionService.sendIqPacket(account, packet, new OnIqPacketReceived() {
+				@Override
+				public void onIqPacketReceived(Account account, IqPacket packet) {
+					Pair<X509Certificate[],byte[]> verification = mXmppConnectionService.getIqParser().verification(packet);
+					if (verification != null) {
+						try {
+							Signature verifier = Signature.getInstance("sha256WithRSA");
+							verifier.initVerify(verification.first[0]);
+							verifier.update(identityKey.serialize());
+							if (verifier.verify(verification.second)) {
+								try {
+									mXmppConnectionService.getMemorizingTrustManager().getNonInteractive().checkClientTrusted(verification.first, "RSA");
+									String fingerprint = session.getFingerprint();
+									Log.d(Config.LOGTAG, "verified session with x.509 signature. fingerprint was: "+fingerprint);
+									setFingerprintTrust(fingerprint, XmppAxolotlSession.Trust.TRUSTED_X509);
+									axolotlStore.setFingerprintCertificate(fingerprint, verification.first[0]);
+									fetchStatusMap.put(address, FetchStatus.SUCCESS_VERIFIED);
+									Bundle information = CryptoHelper.extractCertificateInformation(verification.first[0]);
+									try {
+										final String cn = information.getString("subject_cn");
+										final Jid jid = Jid.fromString(address.getName());
+										Log.d(Config.LOGTAG,"setting common name for "+jid+" to "+cn);
+										account.getRoster().getContact(jid).setCommonName(cn);
+									} catch (final InvalidJidException ignored) {
+										//ignored
+									}
+									finishBuildingSessionsFromPEP(address);
+									return;
+								} catch (Exception e) {
+									Log.d(Config.LOGTAG,"could not verify certificate");
+								}
+							}
+						} catch (Exception e) {
+							Log.d(Config.LOGTAG, "error during verification " + e.getMessage());
+						}
+					} else {
+						Log.d(Config.LOGTAG,"no verification found");
+					}
+					fetchStatusMap.put(address, FetchStatus.SUCCESS);
+					finishBuildingSessionsFromPEP(address);
+				}
+			});
+		} catch (InvalidJidException e) {
+			fetchStatusMap.put(address, FetchStatus.SUCCESS);
+			finishBuildingSessionsFromPEP(address);
+		}
+	}
+
+	private void finishBuildingSessionsFromPEP(final AxolotlAddress address) {
+		AxolotlAddress ownAddress = new AxolotlAddress(account.getJid().toBareJid().toString(), 0);
+		if (!fetchStatusMap.getAll(ownAddress).containsValue(FetchStatus.PENDING)
+				&& !fetchStatusMap.getAll(address).containsValue(FetchStatus.PENDING)) {
+			FetchStatus report = null;
+			if (fetchStatusMap.getAll(ownAddress).containsValue(FetchStatus.SUCCESS_VERIFIED)
+					| fetchStatusMap.getAll(address).containsValue(FetchStatus.SUCCESS_VERIFIED)) {
+				report = FetchStatus.SUCCESS_VERIFIED;
+			} else if (fetchStatusMap.getAll(ownAddress).containsValue(FetchStatus.ERROR)
+					|| fetchStatusMap.getAll(address).containsValue(FetchStatus.ERROR)) {
+				report = FetchStatus.ERROR;
+			}
+			mXmppConnectionService.keyStatusUpdated(report);
+		}
+	}
+
+	private void buildSessionFromPEP(final AxolotlAddress address) {
+		Log.i(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Building new sesstion for " + address.toString());
+		if (address.getDeviceId() == getOwnDeviceId()) {
+			throw new AssertionError("We should NEVER build a session with ourselves. What happened here?!");
+		}
+
+		try {
+			IqPacket bundlesPacket = mXmppConnectionService.getIqGenerator().retrieveBundlesForDevice(
+					Jid.fromString(address.getName()), address.getDeviceId());
+			Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Retrieving bundle: " + bundlesPacket);
+			mXmppConnectionService.sendIqPacket(account, bundlesPacket, new OnIqPacketReceived() {
+
+				@Override
+				public void onIqPacketReceived(Account account, IqPacket packet) {
+					if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
+						fetchStatusMap.put(address, FetchStatus.TIMEOUT);
+					} else if (packet.getType() == IqPacket.TYPE.RESULT) {
+						Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Received preKey IQ packet, processing...");
+						final IqParser parser = mXmppConnectionService.getIqParser();
+						final List<PreKeyBundle> preKeyBundleList = parser.preKeys(packet);
+						final PreKeyBundle bundle = parser.bundle(packet);
+						if (preKeyBundleList.isEmpty() || bundle == null) {
+							Log.e(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "preKey IQ packet invalid: " + packet);
+							fetchStatusMap.put(address, FetchStatus.ERROR);
+							finishBuildingSessionsFromPEP(address);
+							return;
+						}
+						Random random = new Random();
+						final PreKeyBundle preKey = preKeyBundleList.get(random.nextInt(preKeyBundleList.size()));
+						if (preKey == null) {
+							//should never happen
+							fetchStatusMap.put(address, FetchStatus.ERROR);
+							finishBuildingSessionsFromPEP(address);
+							return;
+						}
+
+						final PreKeyBundle preKeyBundle = new PreKeyBundle(0, address.getDeviceId(),
+								preKey.getPreKeyId(), preKey.getPreKey(),
+								bundle.getSignedPreKeyId(), bundle.getSignedPreKey(),
+								bundle.getSignedPreKeySignature(), bundle.getIdentityKey());
+
+						try {
+							SessionBuilder builder = new SessionBuilder(axolotlStore, address);
+							builder.process(preKeyBundle);
+							XmppAxolotlSession session = new XmppAxolotlSession(account, axolotlStore, address, bundle.getIdentityKey());
+							sessions.put(address, session);
+							if (Config.X509_VERIFICATION) {
+								verifySessionWithPEP(session);
+							} else {
+								fetchStatusMap.put(address, FetchStatus.SUCCESS);
+								finishBuildingSessionsFromPEP(address);
+							}
+						} catch (UntrustedIdentityException | InvalidKeyException e) {
+							Log.e(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Error building session for " + address + ": "
+									+ e.getClass().getName() + ", " + e.getMessage());
+							fetchStatusMap.put(address, FetchStatus.ERROR);
+							finishBuildingSessionsFromPEP(address);
+						}
+					} else {
+						fetchStatusMap.put(address, FetchStatus.ERROR);
+						Log.d(Config.LOGTAG, getLogprefix(account) + "Error received while building session:" + packet.findChild("error"));
+						finishBuildingSessionsFromPEP(address);
+					}
+				}
+			});
+		} catch (InvalidJidException e) {
+			Log.e(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Got address with invalid jid: " + address.getName());
+		}
+	}
+
+	@Override
+	public Set<AxolotlAddress> findDevicesWithoutSession(final Conversation conversation) {
+		return findDevicesWithoutSession(conversation.getContact().getJid().toBareJid());
+	}
+
+	@Override
+	public Set<AxolotlAddress> findDevicesWithoutSession(final Jid contactJid) {
+		Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Finding devices without session for " + contactJid);
+		Set<AxolotlAddress> addresses = new HashSet<>();
+		if (deviceIds.get(contactJid) != null) {
+			for (Integer foreignId : this.deviceIds.get(contactJid)) {
+				AxolotlAddress address = new AxolotlAddress(contactJid.toString(), foreignId);
+				if (sessions.get(address) == null) {
+					IdentityKey identityKey = axolotlStore.loadSession(address).getSessionState().getRemoteIdentityKey();
+					if (identityKey != null) {
+						Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Already have session for " + address.toString() + ", adding to cache...");
+						XmppAxolotlSession session = new XmppAxolotlSession(account, axolotlStore, address, identityKey);
+						sessions.put(address, session);
+					} else {
+						Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Found device " + contactJid + ":" + foreignId);
+						if (fetchStatusMap.get(address) != FetchStatus.ERROR) {
+							addresses.add(address);
+						} else {
+							Log.d(Config.LOGTAG,getLogprefix(account)+"skipping over "+address+" because it's broken");
+						}
+					}
+				}
+			}
+		} else {
+			Log.w(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Have no target devices in PEP!");
+		}
+		if (deviceIds.get(account.getJid().toBareJid()) != null) {
+			for (Integer ownId : this.deviceIds.get(account.getJid().toBareJid())) {
+				AxolotlAddress address = new AxolotlAddress(account.getJid().toBareJid().toString(), ownId);
+				if (sessions.get(address) == null) {
+					IdentityKey identityKey = axolotlStore.loadSession(address).getSessionState().getRemoteIdentityKey();
+					if (identityKey != null) {
+						Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Already have session for " + address.toString() + ", adding to cache...");
+						XmppAxolotlSession session = new XmppAxolotlSession(account, axolotlStore, address, identityKey);
+						sessions.put(address, session);
+					} else {
+						Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Found device " + account.getJid().toBareJid() + ":" + ownId);
+						if (fetchStatusMap.get(address) != FetchStatus.ERROR) {
+							addresses.add(address);
+						} else {
+							Log.d(Config.LOGTAG,getLogprefix(account)+"skipping over "+address+" because it's broken");
+						}
+					}
+				}
+			}
+		}
+
+		return addresses;
+	}
+
+	@Override
+	public boolean createSessionsIfNeeded(final Conversation conversation) {
+		Log.i(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Creating axolotl sessions if needed...");
+		boolean newSessions = false;
+		Set<AxolotlAddress> addresses = findDevicesWithoutSession(conversation);
+		for (AxolotlAddress address : addresses) {
+			Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Processing device: " + address.toString());
+			FetchStatus status = fetchStatusMap.get(address);
+			if (status == null || status == FetchStatus.TIMEOUT) {
+				fetchStatusMap.put(address, FetchStatus.PENDING);
+				this.buildSessionFromPEP(address);
+				newSessions = true;
+			} else if (status == FetchStatus.PENDING) {
+				newSessions = true;
+			} else {
+				Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Already fetching bundle for " + address.toString());
+			}
+		}
+
+		return newSessions;
+	}
+
+	@Override
+	public boolean trustedSessionVerified(final Conversation conversation) {
+		Set<XmppAxolotlSession> sessions = findSessionsforContact(conversation.getContact());
+		sessions.addAll(findOwnSessions());
+		boolean verified = false;
+		for(XmppAxolotlSession session : sessions) {
+			if (session.getTrust().trusted()) {
+				if (session.getTrust() == XmppAxolotlSession.Trust.TRUSTED_X509) {
+					verified = true;
+				} else {
+					return false;
+				}
+			}
+		}
+		return verified;
+	}
+
+	@Override
+	public boolean hasPendingKeyFetches(Account account, Contact contact) {
+		AxolotlAddress ownAddress = new AxolotlAddress(account.getJid().toBareJid().toString(), 0);
+		AxolotlAddress foreignAddress = new AxolotlAddress(contact.getJid().toBareJid().toString(), 0);
+		return fetchStatusMap.getAll(ownAddress).containsValue(FetchStatus.PENDING)
+				|| fetchStatusMap.getAll(foreignAddress).containsValue(FetchStatus.PENDING);
+
+	}
+
+	@Nullable
+	private XmppAxolotlMessage buildHeader(Contact contact) {
+		final XmppAxolotlMessage axolotlMessage = new XmppAxolotlMessage(
+				contact.getJid().toBareJid(), getOwnDeviceId());
+
+		Set<XmppAxolotlSession> contactSessions = findSessionsforContact(contact);
+		Set<XmppAxolotlSession> ownSessions = findOwnSessions();
+		if (contactSessions.isEmpty()) {
+			return null;
+		}
+		Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Building axolotl foreign keyElements...");
+		for (XmppAxolotlSession session : contactSessions) {
+			Log.v(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + session.getRemoteAddress().toString());
+			axolotlMessage.addDevice(session);
+		}
+		Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Building axolotl own keyElements...");
+		for (XmppAxolotlSession session : ownSessions) {
+			Log.v(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + session.getRemoteAddress().toString());
+			axolotlMessage.addDevice(session);
+		}
+
+		return axolotlMessage;
+	}
+
+	@Override
+	@Nullable
+	public XmppAxolotlMessage encrypt(Message message) {
+		XmppAxolotlMessage axolotlMessage = buildHeader(message.getContact());
+
+		if (axolotlMessage != null) {
+			final String content;
+			if (message.hasFileOnRemoteHost()) {
+				content = message.getFileParams().url.toString();
+			} else {
+				content = message.getBody();
+			}
+			try {
+				axolotlMessage.encrypt(content);
+			} catch (CryptoFailedException e) {
+				Log.w(Config.LOGTAG, getLogprefix(account) + "Failed to encrypt message: " + e.getMessage());
+				return null;
+			}
+		}
+
+		return axolotlMessage;
+	}
+
+	@Override
+	public void preparePayloadMessage(final Message message, final boolean delay) {
+		executor.execute(new Runnable() {
+			@Override
+			public void run() {
+				XmppAxolotlMessage axolotlMessage = encrypt(message);
+				if (axolotlMessage == null) {
+					mXmppConnectionService.markMessage(message, Message.STATUS_SEND_FAILED);
+					//mXmppConnectionService.updateConversationUi();
+				} else {
+					Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Generated message, caching: " + message.getUuid());
+					messageCache.put(message.getUuid(), axolotlMessage);
+					mXmppConnectionService.resendMessage(message, delay);
+				}
+			}
+		});
+	}
+
+	@Override
+	public void prepareKeyTransportMessage(final Contact contact, final OnMessageCreatedCallback onMessageCreatedCallback) {
+		executor.execute(new Runnable() {
+			@Override
+			public void run() {
+				XmppAxolotlMessage axolotlMessage = buildHeader(contact);
+				onMessageCreatedCallback.run(axolotlMessage);
+			}
+		});
+	}
+
+	@Override
+	public XmppAxolotlMessage fetchAxolotlMessageFromCache(Message message) {
+		XmppAxolotlMessage axolotlMessage = messageCache.get(message.getUuid());
+		if (axolotlMessage != null) {
+			Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Cache hit: " + message.getUuid());
+			messageCache.remove(message.getUuid());
+		} else {
+			Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Cache miss: " + message.getUuid());
+		}
+		return axolotlMessage;
+	}
+
+	private XmppAxolotlSession recreateUncachedSession(AxolotlAddress address) {
+		IdentityKey identityKey = axolotlStore.loadSession(address).getSessionState().getRemoteIdentityKey();
+		return (identityKey != null)
+				? new XmppAxolotlSession(account, axolotlStore, address, identityKey)
+				: null;
+	}
+
+	private XmppAxolotlSession getReceivingSession(XmppAxolotlMessage message) {
+		AxolotlAddress senderAddress = new AxolotlAddress(message.getFrom().toString(),
+				message.getSenderDeviceId());
+		XmppAxolotlSession session = sessions.get(senderAddress);
+		if (session == null) {
+			Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Account: " + account.getJid() + " No axolotl session found while parsing received message " + message);
+			session = recreateUncachedSession(senderAddress);
+			if (session == null) {
+				session = new XmppAxolotlSession(account, axolotlStore, senderAddress);
+			}
+		}
+		return session;
+	}
+
+	@Override
+	public XmppAxolotlMessage.XmppAxolotlPlaintextMessage processReceivingPayloadMessage(XmppAxolotlMessage message) {
+		XmppAxolotlMessage.XmppAxolotlPlaintextMessage plaintextMessage = null;
+
+		XmppAxolotlSession session = getReceivingSession(message);
+		try {
+			plaintextMessage = message.decrypt(session, getOwnDeviceId());
+			Integer preKeyId = session.getPreKeyId();
+			if (preKeyId != null) {
+				publishBundlesIfNeeded(false, false);
+				session.resetPreKeyId();
+			}
+		} catch (CryptoFailedException e) {
+			Log.w(Config.LOGTAG, getLogprefix(account) + "Failed to decrypt message: " + e.getMessage());
+		}
+
+		if (session.isFresh() && plaintextMessage != null) {
+			putFreshSession(session);
+		}
+
+		return plaintextMessage;
+	}
+
+	@Override
+	public XmppAxolotlMessage.XmppAxolotlKeyTransportMessage processReceivingKeyTransportMessage(XmppAxolotlMessage message) {
+		XmppAxolotlMessage.XmppAxolotlKeyTransportMessage keyTransportMessage;
+
+		XmppAxolotlSession session = getReceivingSession(message);
+		keyTransportMessage = message.getParameters(session, getOwnDeviceId());
+
+		if (session.isFresh() && keyTransportMessage != null) {
+			putFreshSession(session);
+		}
+
+		return keyTransportMessage;
+	}
+
+	private void putFreshSession(XmppAxolotlSession session) {
+		Log.d(Config.LOGTAG,"put fresh session");
+		sessions.put(session);
+		if (Config.X509_VERIFICATION) {
+			if (session.getIdentityKey() != null) {
+				verifySessionWithPEP(session);
+			} else {
+				Log.e(Config.LOGTAG,account.getJid().toBareJid()+": identity key was empty after reloading for x509 verification");
+			}
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/AxolotlServiceStub.java b/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/AxolotlServiceStub.java
new file mode 100644
index 00000000..a07905ab
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/AxolotlServiceStub.java
@@ -0,0 +1,196 @@
+package de.thedevstack.conversationsplus.crypto.axolotl;
+
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+
+import org.whispersystems.libaxolotl.AxolotlAddress;
+import org.whispersystems.libaxolotl.IdentityKey;
+import org.whispersystems.libaxolotl.state.PreKeyRecord;
+import org.whispersystems.libaxolotl.state.SignedPreKeyRecord;
+
+import java.security.cert.X509Certificate;
+import java.util.Collections;
+import java.util.Set;
+
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+/**
+ * Axolotl Service Stub implementation to avoid axolotl usage.
+ */
+public class AxolotlServiceStub implements AxolotlService {
+
+    @Override
+    public boolean fetchMapHasErrors(Contact contact) {
+        return false;
+    }
+
+    @Override
+    public String getOwnFingerprint() {
+        return null;
+    }
+
+    @Override
+    public Set<IdentityKey> getKeysWithTrust(XmppAxolotlSession.Trust trust) {
+        return Collections.emptySet();
+    }
+
+    @Override
+    public Set<IdentityKey> getKeysWithTrust(XmppAxolotlSession.Trust trust, Contact contact) {
+        return Collections.emptySet();
+    }
+
+    @Override
+    public long getNumTrustedKeys(Contact contact) {
+        return 0;
+    }
+
+    @Override
+    public Set<String> getFingerprintsForOwnSessions() {
+        return Collections.emptySet();
+    }
+
+    @Override
+    public Set<String> getFingerprintsForContact(Contact contact) {
+        return Collections.emptySet();
+    }
+
+    @Override
+    public boolean isPepBroken() {
+        return true;
+    }
+
+    @Override
+    public void regenerateKeys(boolean wipeOther) {
+
+    }
+
+    @Override
+    public int getOwnDeviceId() {
+        return 0;
+    }
+
+    @Override
+    public Set<Integer> getOwnDeviceIds() {
+        return Collections.emptySet();
+    }
+
+    @Override
+    public void registerDevices(Jid jid, @NonNull Set<Integer> deviceIds) {
+
+    }
+
+    @Override
+    public void wipeOtherPepDevices() {
+
+    }
+
+    @Override
+    public void purgeKey(String fingerprint) {
+
+    }
+
+    @Override
+    public void publishOwnDeviceIdIfNeeded() {
+
+    }
+
+    @Override
+    public void publishOwnDeviceId(Set<Integer> deviceIds) {
+
+    }
+
+    @Override
+    public void publishDeviceVerificationAndBundle(SignedPreKeyRecord signedPreKeyRecord, Set<PreKeyRecord> preKeyRecords, boolean announceAfter, boolean wipe) {
+
+    }
+
+    @Override
+    public void publishBundlesIfNeeded(boolean announce, boolean wipe) {
+
+    }
+
+    @Override
+    public boolean isContactAxolotlCapable(Contact contact) {
+        return false;
+    }
+
+    @Override
+    public XmppAxolotlSession.Trust getFingerprintTrust(String fingerprint) {
+        return XmppAxolotlSession.Trust.TRUSTED;
+    }
+
+    @Override
+    public X509Certificate getFingerprintCertificate(String fingerprint) {
+        return null;
+    }
+
+    @Override
+    public void setFingerprintTrust(String fingerprint, XmppAxolotlSession.Trust trust) {
+
+    }
+
+    @Override
+    public Set<AxolotlAddress> findDevicesWithoutSession(Conversation conversation) {
+        return Collections.emptySet();
+    }
+
+    @Override
+    public Set<AxolotlAddress> findDevicesWithoutSession(Jid contactJid) {
+        return Collections.emptySet();
+    }
+
+    @Override
+    public boolean createSessionsIfNeeded(Conversation conversation) {
+        return false;
+    }
+
+    @Override
+    public boolean trustedSessionVerified(Conversation conversation) {
+        return false;
+    }
+
+    @Override
+    public boolean hasPendingKeyFetches(Account account, Contact contact) {
+        return false;
+    }
+
+    @Nullable
+    @Override
+    public XmppAxolotlMessage encrypt(Message message) {
+        return null;
+    }
+
+    @Override
+    public void preparePayloadMessage(Message message, boolean delay) {
+
+    }
+
+    @Override
+    public void prepareKeyTransportMessage(Contact contact, OnMessageCreatedCallback onMessageCreatedCallback) {
+
+    }
+
+    @Override
+    public XmppAxolotlMessage fetchAxolotlMessageFromCache(Message message) {
+        return null;
+    }
+
+    @Override
+    public XmppAxolotlMessage.XmppAxolotlPlaintextMessage processReceivingPayloadMessage(XmppAxolotlMessage message) {
+        return null;
+    }
+
+    @Override
+    public XmppAxolotlMessage.XmppAxolotlKeyTransportMessage processReceivingKeyTransportMessage(XmppAxolotlMessage message) {
+        return null;
+    }
+
+    @Override
+    public void onAdvancedStreamFeaturesAvailable(Account account) {
+
+    }
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/CryptoFailedException.java b/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/CryptoFailedException.java
new file mode 100644
index 00000000..df281248
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/CryptoFailedException.java
@@ -0,0 +1,7 @@
+package de.thedevstack.conversationsplus.crypto.axolotl;
+
+public class CryptoFailedException extends Exception {
+	public CryptoFailedException(Exception e){
+		super(e);
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/NoSessionsCreatedException.java b/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/NoSessionsCreatedException.java
new file mode 100644
index 00000000..bcb1c6a8
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/NoSessionsCreatedException.java
@@ -0,0 +1,4 @@
+package de.thedevstack.conversationsplus.crypto.axolotl;
+
+public class NoSessionsCreatedException extends Throwable{
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/OnMessageCreatedCallback.java b/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/OnMessageCreatedCallback.java
new file mode 100644
index 00000000..082b514b
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/OnMessageCreatedCallback.java
@@ -0,0 +1,5 @@
+package de.thedevstack.conversationsplus.crypto.axolotl;
+
+public interface OnMessageCreatedCallback {
+	void run(XmppAxolotlMessage message);
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/SQLiteAxolotlStore.java b/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/SQLiteAxolotlStore.java
new file mode 100644
index 00000000..35f630bb
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/SQLiteAxolotlStore.java
@@ -0,0 +1,429 @@
+package de.thedevstack.conversationsplus.crypto.axolotl;
+
+import android.util.Log;
+import android.util.LruCache;
+
+import org.whispersystems.libaxolotl.AxolotlAddress;
+import org.whispersystems.libaxolotl.IdentityKey;
+import org.whispersystems.libaxolotl.IdentityKeyPair;
+import org.whispersystems.libaxolotl.InvalidKeyIdException;
+import org.whispersystems.libaxolotl.ecc.Curve;
+import org.whispersystems.libaxolotl.ecc.ECKeyPair;
+import org.whispersystems.libaxolotl.state.AxolotlStore;
+import org.whispersystems.libaxolotl.state.PreKeyRecord;
+import org.whispersystems.libaxolotl.state.SessionRecord;
+import org.whispersystems.libaxolotl.state.SignedPreKeyRecord;
+import org.whispersystems.libaxolotl.util.KeyHelper;
+
+import java.security.cert.X509Certificate;
+import java.util.List;
+import java.util.Set;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+
+public class SQLiteAxolotlStore implements AxolotlStore {
+
+	public static final String PREKEY_TABLENAME = "prekeys";
+	public static final String SIGNED_PREKEY_TABLENAME = "signed_prekeys";
+	public static final String SESSION_TABLENAME = "sessions";
+	public static final String IDENTITIES_TABLENAME = "identities";
+	public static final String ACCOUNT = "account";
+	public static final String DEVICE_ID = "device_id";
+	public static final String ID = "id";
+	public static final String KEY = "key";
+	public static final String FINGERPRINT = "fingerprint";
+	public static final String NAME = "name";
+	public static final String TRUSTED = "trusted";
+	public static final String OWN = "ownkey";
+	public static final String CERTIFICATE = "certificate";
+
+	public static final String JSONKEY_REGISTRATION_ID = "axolotl_reg_id";
+	public static final String JSONKEY_CURRENT_PREKEY_ID = "axolotl_cur_prekey_id";
+
+	private static final int NUM_TRUSTS_TO_CACHE = 100;
+
+	private final Account account;
+	private final XmppConnectionService mXmppConnectionService;
+
+	private IdentityKeyPair identityKeyPair;
+	private int localRegistrationId;
+	private int currentPreKeyId = 0;
+
+	private final LruCache<String, XmppAxolotlSession.Trust> trustCache =
+			new LruCache<String, XmppAxolotlSession.Trust>(NUM_TRUSTS_TO_CACHE) {
+				@Override
+				protected XmppAxolotlSession.Trust create(String fingerprint) {
+					return mXmppConnectionService.databaseBackend.isIdentityKeyTrusted(account, fingerprint);
+				}
+			};
+
+	private static IdentityKeyPair generateIdentityKeyPair() {
+		Log.i(Config.LOGTAG, AxolotlService.LOGPREFIX + " : " + "Generating axolotl IdentityKeyPair...");
+		ECKeyPair identityKeyPairKeys = Curve.generateKeyPair();
+		return new IdentityKeyPair(new IdentityKey(identityKeyPairKeys.getPublicKey()),
+				identityKeyPairKeys.getPrivateKey());
+	}
+
+	private static int generateRegistrationId() {
+		Log.i(Config.LOGTAG, AxolotlService.LOGPREFIX + " : " + "Generating axolotl registration ID...");
+		return KeyHelper.generateRegistrationId(true);
+	}
+
+	public SQLiteAxolotlStore(Account account, XmppConnectionService service) {
+		this.account = account;
+		this.mXmppConnectionService = service;
+		this.localRegistrationId = loadRegistrationId();
+		this.currentPreKeyId = loadCurrentPreKeyId();
+		for (SignedPreKeyRecord record : loadSignedPreKeys()) {
+			Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Got Axolotl signed prekey record:" + record.getId());
+		}
+	}
+
+	public int getCurrentPreKeyId() {
+		return currentPreKeyId;
+	}
+
+	// --------------------------------------
+	// IdentityKeyStore
+	// --------------------------------------
+
+	private IdentityKeyPair loadIdentityKeyPair() {
+		IdentityKeyPair ownKey = mXmppConnectionService.databaseBackend.loadOwnIdentityKeyPair(account);
+
+		if (ownKey != null) {
+			return ownKey;
+		} else {
+			Log.i(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Could not retrieve own IdentityKeyPair");
+			ownKey = generateIdentityKeyPair();
+			mXmppConnectionService.databaseBackend.storeOwnIdentityKeyPair(account, ownKey);
+		}
+		return ownKey;
+	}
+
+	private int loadRegistrationId() {
+		return loadRegistrationId(false);
+	}
+
+	private int loadRegistrationId(boolean regenerate) {
+		String regIdString = this.account.getKey(JSONKEY_REGISTRATION_ID);
+		int reg_id;
+		if (!regenerate && regIdString != null) {
+			reg_id = Integer.valueOf(regIdString);
+		} else {
+			Log.i(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Could not retrieve axolotl registration id for account " + account.getJid());
+			reg_id = generateRegistrationId();
+			boolean success = this.account.setKey(JSONKEY_REGISTRATION_ID, Integer.toString(reg_id));
+			if (success) {
+				mXmppConnectionService.databaseBackend.updateAccount(account);
+			} else {
+				Log.e(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Failed to write new key to the database!");
+			}
+		}
+		return reg_id;
+	}
+
+	private int loadCurrentPreKeyId() {
+		String regIdString = this.account.getKey(JSONKEY_CURRENT_PREKEY_ID);
+		int reg_id;
+		if (regIdString != null) {
+			reg_id = Integer.valueOf(regIdString);
+		} else {
+			Log.w(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Could not retrieve current prekey id for account " + account.getJid());
+			reg_id = 0;
+		}
+		return reg_id;
+	}
+
+	public void regenerate() {
+		mXmppConnectionService.databaseBackend.wipeAxolotlDb(account);
+		trustCache.evictAll();
+		account.setKey(JSONKEY_CURRENT_PREKEY_ID, Integer.toString(0));
+		identityKeyPair = loadIdentityKeyPair();
+		localRegistrationId = loadRegistrationId(true);
+		currentPreKeyId = 0;
+		mXmppConnectionService.updateAccountUi();
+	}
+
+	/**
+	 * Get the local client's identity key pair.
+	 *
+	 * @return The local client's persistent identity key pair.
+	 */
+	@Override
+	public IdentityKeyPair getIdentityKeyPair() {
+		if (identityKeyPair == null) {
+			identityKeyPair = loadIdentityKeyPair();
+		}
+		return identityKeyPair;
+	}
+
+	/**
+	 * Return the local client's registration ID.
+	 * <p/>
+	 * Clients should maintain a registration ID, a random number
+	 * between 1 and 16380 that's generated once at install time.
+	 *
+	 * @return the local client's registration ID.
+	 */
+	@Override
+	public int getLocalRegistrationId() {
+		return localRegistrationId;
+	}
+
+	/**
+	 * Save a remote client's identity key
+	 * <p/>
+	 * Store a remote client's identity key as trusted.
+	 *
+	 * @param name        The name of the remote client.
+	 * @param identityKey The remote client's identity key.
+	 */
+	@Override
+	public void saveIdentity(String name, IdentityKey identityKey) {
+		if (!mXmppConnectionService.databaseBackend.loadIdentityKeys(account, name).contains(identityKey)) {
+			mXmppConnectionService.databaseBackend.storeIdentityKey(account, name, identityKey);
+		}
+	}
+
+	/**
+	 * Verify a remote client's identity key.
+	 * <p/>
+	 * Determine whether a remote client's identity is trusted.  Convention is
+	 * that the TextSecure protocol is 'trust on first use.'  This means that
+	 * an identity key is considered 'trusted' if there is no entry for the recipient
+	 * in the local store, or if it matches the saved key for a recipient in the local
+	 * store.  Only if it mismatches an entry in the local store is it considered
+	 * 'untrusted.'
+	 *
+	 * @param name        The name of the remote client.
+	 * @param identityKey The identity key to verify.
+	 * @return true if trusted, false if untrusted.
+	 */
+	@Override
+	public boolean isTrustedIdentity(String name, IdentityKey identityKey) {
+		return true;
+	}
+
+	public XmppAxolotlSession.Trust getFingerprintTrust(String fingerprint) {
+		return (fingerprint == null)? null : trustCache.get(fingerprint);
+	}
+
+	public void setFingerprintTrust(String fingerprint, XmppAxolotlSession.Trust trust) {
+		mXmppConnectionService.databaseBackend.setIdentityKeyTrust(account, fingerprint, trust);
+		trustCache.remove(fingerprint);
+	}
+
+	public void setFingerprintCertificate(String fingerprint, X509Certificate x509Certificate) {
+		mXmppConnectionService.databaseBackend.setIdentityKeyCertificate(account, fingerprint, x509Certificate);
+	}
+
+	public X509Certificate getFingerprintCertificate(String fingerprint) {
+		return mXmppConnectionService.databaseBackend.getIdentityKeyCertifcate(account, fingerprint);
+	}
+
+	public Set<IdentityKey> getContactKeysWithTrust(String bareJid, XmppAxolotlSession.Trust trust) {
+		return mXmppConnectionService.databaseBackend.loadIdentityKeys(account, bareJid, trust);
+	}
+
+	public long getContactNumTrustedKeys(String bareJid) {
+		return mXmppConnectionService.databaseBackend.numTrustedKeys(account, bareJid);
+	}
+
+	// --------------------------------------
+	// SessionStore
+	// --------------------------------------
+
+	/**
+	 * Returns a copy of the {@link SessionRecord} corresponding to the recipientId + deviceId tuple,
+	 * or a new SessionRecord if one does not currently exist.
+	 * <p/>
+	 * It is important that implementations return a copy of the current durable information.  The
+	 * returned SessionRecord may be modified, but those changes should not have an effect on the
+	 * durable session state (what is returned by subsequent calls to this method) without the
+	 * store method being called here first.
+	 *
+	 * @param address The name and device ID of the remote client.
+	 * @return a copy of the SessionRecord corresponding to the recipientId + deviceId tuple, or
+	 * a new SessionRecord if one does not currently exist.
+	 */
+	@Override
+	public SessionRecord loadSession(AxolotlAddress address) {
+		SessionRecord session = mXmppConnectionService.databaseBackend.loadSession(this.account, address);
+		return (session != null) ? session : new SessionRecord();
+	}
+
+	/**
+	 * Returns all known devices with active sessions for a recipient
+	 *
+	 * @param name the name of the client.
+	 * @return all known sub-devices with active sessions.
+	 */
+	@Override
+	public List<Integer> getSubDeviceSessions(String name) {
+		return mXmppConnectionService.databaseBackend.getSubDeviceSessions(account,
+				new AxolotlAddress(name, 0));
+	}
+
+	/**
+	 * Commit to storage the {@link SessionRecord} for a given recipientId + deviceId tuple.
+	 *
+	 * @param address the address of the remote client.
+	 * @param record  the current SessionRecord for the remote client.
+	 */
+	@Override
+	public void storeSession(AxolotlAddress address, SessionRecord record) {
+		mXmppConnectionService.databaseBackend.storeSession(account, address, record);
+	}
+
+	/**
+	 * Determine whether there is a committed {@link SessionRecord} for a recipientId + deviceId tuple.
+	 *
+	 * @param address the address of the remote client.
+	 * @return true if a {@link SessionRecord} exists, false otherwise.
+	 */
+	@Override
+	public boolean containsSession(AxolotlAddress address) {
+		return mXmppConnectionService.databaseBackend.containsSession(account, address);
+	}
+
+	/**
+	 * Remove a {@link SessionRecord} for a recipientId + deviceId tuple.
+	 *
+	 * @param address the address of the remote client.
+	 */
+	@Override
+	public void deleteSession(AxolotlAddress address) {
+		mXmppConnectionService.databaseBackend.deleteSession(account, address);
+	}
+
+	/**
+	 * Remove the {@link SessionRecord}s corresponding to all devices of a recipientId.
+	 *
+	 * @param name the name of the remote client.
+	 */
+	@Override
+	public void deleteAllSessions(String name) {
+		AxolotlAddress address = new AxolotlAddress(name, 0);
+		mXmppConnectionService.databaseBackend.deleteAllSessions(account,
+				address);
+	}
+
+	// --------------------------------------
+	// PreKeyStore
+	// --------------------------------------
+
+	/**
+	 * Load a local PreKeyRecord.
+	 *
+	 * @param preKeyId the ID of the local PreKeyRecord.
+	 * @return the corresponding PreKeyRecord.
+	 * @throws InvalidKeyIdException when there is no corresponding PreKeyRecord.
+	 */
+	@Override
+	public PreKeyRecord loadPreKey(int preKeyId) throws InvalidKeyIdException {
+		PreKeyRecord record = mXmppConnectionService.databaseBackend.loadPreKey(account, preKeyId);
+		if (record == null) {
+			throw new InvalidKeyIdException("No such PreKeyRecord: " + preKeyId);
+		}
+		return record;
+	}
+
+	/**
+	 * Store a local PreKeyRecord.
+	 *
+	 * @param preKeyId the ID of the PreKeyRecord to store.
+	 * @param record   the PreKeyRecord.
+	 */
+	@Override
+	public void storePreKey(int preKeyId, PreKeyRecord record) {
+		mXmppConnectionService.databaseBackend.storePreKey(account, record);
+		currentPreKeyId = preKeyId;
+		boolean success = this.account.setKey(JSONKEY_CURRENT_PREKEY_ID, Integer.toString(preKeyId));
+		if (success) {
+			mXmppConnectionService.databaseBackend.updateAccount(account);
+		} else {
+			Log.e(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Failed to write new prekey id to the database!");
+		}
+	}
+
+	/**
+	 * @param preKeyId A PreKeyRecord ID.
+	 * @return true if the store has a record for the preKeyId, otherwise false.
+	 */
+	@Override
+	public boolean containsPreKey(int preKeyId) {
+		return mXmppConnectionService.databaseBackend.containsPreKey(account, preKeyId);
+	}
+
+	/**
+	 * Delete a PreKeyRecord from local storage.
+	 *
+	 * @param preKeyId The ID of the PreKeyRecord to remove.
+	 */
+	@Override
+	public void removePreKey(int preKeyId) {
+		mXmppConnectionService.databaseBackend.deletePreKey(account, preKeyId);
+	}
+
+	// --------------------------------------
+	// SignedPreKeyStore
+	// --------------------------------------
+
+	/**
+	 * Load a local SignedPreKeyRecord.
+	 *
+	 * @param signedPreKeyId the ID of the local SignedPreKeyRecord.
+	 * @return the corresponding SignedPreKeyRecord.
+	 * @throws InvalidKeyIdException when there is no corresponding SignedPreKeyRecord.
+	 */
+	@Override
+	public SignedPreKeyRecord loadSignedPreKey(int signedPreKeyId) throws InvalidKeyIdException {
+		SignedPreKeyRecord record = mXmppConnectionService.databaseBackend.loadSignedPreKey(account, signedPreKeyId);
+		if (record == null) {
+			throw new InvalidKeyIdException("No such SignedPreKeyRecord: " + signedPreKeyId);
+		}
+		return record;
+	}
+
+	/**
+	 * Load all local SignedPreKeyRecords.
+	 *
+	 * @return All stored SignedPreKeyRecords.
+	 */
+	@Override
+	public List<SignedPreKeyRecord> loadSignedPreKeys() {
+		return mXmppConnectionService.databaseBackend.loadSignedPreKeys(account);
+	}
+
+	/**
+	 * Store a local SignedPreKeyRecord.
+	 *
+	 * @param signedPreKeyId the ID of the SignedPreKeyRecord to store.
+	 * @param record         the SignedPreKeyRecord.
+	 */
+	@Override
+	public void storeSignedPreKey(int signedPreKeyId, SignedPreKeyRecord record) {
+		mXmppConnectionService.databaseBackend.storeSignedPreKey(account, record);
+	}
+
+	/**
+	 * @param signedPreKeyId A SignedPreKeyRecord ID.
+	 * @return true if the store has a record for the signedPreKeyId, otherwise false.
+	 */
+	@Override
+	public boolean containsSignedPreKey(int signedPreKeyId) {
+		return mXmppConnectionService.databaseBackend.containsSignedPreKey(account, signedPreKeyId);
+	}
+
+	/**
+	 * Delete a SignedPreKeyRecord from local storage.
+	 *
+	 * @param signedPreKeyId The ID of the SignedPreKeyRecord to remove.
+	 */
+	@Override
+	public void removeSignedPreKey(int signedPreKeyId) {
+		mXmppConnectionService.databaseBackend.deleteSignedPreKey(account, signedPreKeyId);
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/XmppAxolotlMessage.java b/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/XmppAxolotlMessage.java
new file mode 100644
index 00000000..837b601c
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/XmppAxolotlMessage.java
@@ -0,0 +1,249 @@
+package de.thedevstack.conversationsplus.crypto.axolotl;
+
+import android.util.Base64;
+import android.util.Log;
+
+import java.security.InvalidAlgorithmParameterException;
+import java.security.InvalidKeyException;
+import java.security.NoSuchAlgorithmException;
+import java.security.NoSuchProviderException;
+import java.security.SecureRandom;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import javax.crypto.BadPaddingException;
+import javax.crypto.Cipher;
+import javax.crypto.IllegalBlockSizeException;
+import javax.crypto.KeyGenerator;
+import javax.crypto.NoSuchPaddingException;
+import javax.crypto.SecretKey;
+import javax.crypto.spec.IvParameterSpec;
+import javax.crypto.spec.SecretKeySpec;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class XmppAxolotlMessage {
+	public static final String CONTAINERTAG = "encrypted";
+	public static final String HEADER = "header";
+	public static final String SOURCEID = "sid";
+	public static final String KEYTAG = "key";
+	public static final String REMOTEID = "rid";
+	public static final String IVTAG = "iv";
+	public static final String PAYLOAD = "payload";
+
+	private static final String KEYTYPE = "AES";
+	private static final String CIPHERMODE = "AES/GCM/NoPadding";
+	private static final String PROVIDER = "BC";
+
+	private byte[] innerKey;
+	private byte[] ciphertext = null;
+	private byte[] iv = null;
+	private final Map<Integer, byte[]> keys;
+	private final Jid from;
+	private final int sourceDeviceId;
+
+	public static class XmppAxolotlPlaintextMessage {
+		private final String plaintext;
+		private final String fingerprint;
+
+		public XmppAxolotlPlaintextMessage(String plaintext, String fingerprint) {
+			this.plaintext = plaintext;
+			this.fingerprint = fingerprint;
+		}
+
+		public String getPlaintext() {
+			return plaintext;
+		}
+
+
+		public String getFingerprint() {
+			return fingerprint;
+		}
+	}
+
+	public static class XmppAxolotlKeyTransportMessage {
+		private final String fingerprint;
+		private final byte[] key;
+		private final byte[] iv;
+
+		public XmppAxolotlKeyTransportMessage(String fingerprint, byte[] key, byte[] iv) {
+			this.fingerprint = fingerprint;
+			this.key = key;
+			this.iv = iv;
+		}
+
+		public String getFingerprint() {
+			return fingerprint;
+		}
+
+		public byte[] getKey() {
+			return key;
+		}
+
+		public byte[] getIv() {
+			return iv;
+		}
+	}
+
+	private XmppAxolotlMessage(final Element axolotlMessage, final Jid from) throws IllegalArgumentException {
+		this.from = from;
+		Element header = axolotlMessage.findChild(HEADER);
+		this.sourceDeviceId = Integer.parseInt(header.getAttribute(SOURCEID));
+		List<Element> keyElements = header.getChildren();
+		this.keys = new HashMap<>(keyElements.size());
+		for (Element keyElement : keyElements) {
+			switch (keyElement.getName()) {
+				case KEYTAG:
+					try {
+						Integer recipientId = Integer.parseInt(keyElement.getAttribute(REMOTEID));
+						byte[] key = Base64.decode(keyElement.getContent(), Base64.DEFAULT);
+						this.keys.put(recipientId, key);
+					} catch (NumberFormatException e) {
+						throw new IllegalArgumentException(e);
+					}
+					break;
+				case IVTAG:
+					if (this.iv != null) {
+						throw new IllegalArgumentException("Duplicate iv entry");
+					}
+					iv = Base64.decode(keyElement.getContent(), Base64.DEFAULT);
+					break;
+				default:
+					Log.w(Config.LOGTAG, "Unexpected element in header: " + keyElement.toString());
+					break;
+			}
+		}
+		Element payloadElement = axolotlMessage.findChild(PAYLOAD);
+		if (payloadElement != null) {
+			ciphertext = Base64.decode(payloadElement.getContent(), Base64.DEFAULT);
+		}
+	}
+
+	public XmppAxolotlMessage(Jid from, int sourceDeviceId) {
+		this.from = from;
+		this.sourceDeviceId = sourceDeviceId;
+		this.keys = new HashMap<>();
+		this.iv = generateIv();
+		this.innerKey = generateKey();
+	}
+
+	public static XmppAxolotlMessage fromElement(Element element, Jid from) {
+		return new XmppAxolotlMessage(element, from);
+	}
+
+	private static byte[] generateKey() {
+		try {
+			KeyGenerator generator = KeyGenerator.getInstance(KEYTYPE);
+			generator.init(128);
+			return generator.generateKey().getEncoded();
+		} catch (NoSuchAlgorithmException e) {
+			Log.e(Config.LOGTAG, e.getMessage());
+			return null;
+		}
+	}
+
+	private static byte[] generateIv() {
+		SecureRandom random = new SecureRandom();
+		byte[] iv = new byte[16];
+		random.nextBytes(iv);
+		return iv;
+	}
+
+	public void encrypt(String plaintext) throws CryptoFailedException {
+		try {
+			SecretKey secretKey = new SecretKeySpec(innerKey, KEYTYPE);
+			IvParameterSpec ivSpec = new IvParameterSpec(iv);
+			Cipher cipher = Cipher.getInstance(CIPHERMODE, PROVIDER);
+			cipher.init(Cipher.ENCRYPT_MODE, secretKey, ivSpec);
+			this.innerKey = secretKey.getEncoded();
+			this.ciphertext = cipher.doFinal(plaintext.getBytes());
+		} catch (NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException
+				| IllegalBlockSizeException | BadPaddingException | NoSuchProviderException
+				| InvalidAlgorithmParameterException e) {
+			throw new CryptoFailedException(e);
+		}
+	}
+
+	public Jid getFrom() {
+		return this.from;
+	}
+
+	public int getSenderDeviceId() {
+		return sourceDeviceId;
+	}
+
+	public byte[] getCiphertext() {
+		return ciphertext;
+	}
+
+	public void addDevice(XmppAxolotlSession session) {
+		byte[] key = session.processSending(innerKey);
+		if (key != null) {
+			keys.put(session.getRemoteAddress().getDeviceId(), key);
+		}
+	}
+
+	public byte[] getInnerKey() {
+		return innerKey;
+	}
+
+	public byte[] getIV() {
+		return this.iv;
+	}
+
+	public Element toElement() {
+		Element encryptionElement = new Element(CONTAINERTAG, AxolotlService.PEP_PREFIX);
+		Element headerElement = encryptionElement.addChild(HEADER);
+		headerElement.setAttribute(SOURCEID, sourceDeviceId);
+		for (Map.Entry<Integer, byte[]> keyEntry : keys.entrySet()) {
+			Element keyElement = new Element(KEYTAG);
+			keyElement.setAttribute(REMOTEID, keyEntry.getKey());
+			keyElement.setContent(Base64.encodeToString(keyEntry.getValue(), Base64.DEFAULT));
+			headerElement.addChild(keyElement);
+		}
+		headerElement.addChild(IVTAG).setContent(Base64.encodeToString(iv, Base64.DEFAULT));
+		if (ciphertext != null) {
+			Element payload = encryptionElement.addChild(PAYLOAD);
+			payload.setContent(Base64.encodeToString(ciphertext, Base64.DEFAULT));
+		}
+		return encryptionElement;
+	}
+
+	private byte[] unpackKey(XmppAxolotlSession session, Integer sourceDeviceId) {
+		byte[] encryptedKey = keys.get(sourceDeviceId);
+		return (encryptedKey != null) ? session.processReceiving(encryptedKey) : null;
+	}
+
+	public XmppAxolotlKeyTransportMessage getParameters(XmppAxolotlSession session, Integer sourceDeviceId) {
+		byte[] key = unpackKey(session, sourceDeviceId);
+		return (key != null)
+				? new XmppAxolotlKeyTransportMessage(session.getFingerprint(), key, getIV())
+				: null;
+	}
+
+	public XmppAxolotlPlaintextMessage decrypt(XmppAxolotlSession session, Integer sourceDeviceId) throws CryptoFailedException {
+		XmppAxolotlPlaintextMessage plaintextMessage = null;
+		byte[] key = unpackKey(session, sourceDeviceId);
+		if (key != null) {
+			try {
+				Cipher cipher = Cipher.getInstance(CIPHERMODE, PROVIDER);
+				SecretKeySpec keySpec = new SecretKeySpec(key, KEYTYPE);
+				IvParameterSpec ivSpec = new IvParameterSpec(iv);
+
+				cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
+
+				String plaintext = new String(cipher.doFinal(ciphertext));
+				plaintextMessage = new XmppAxolotlPlaintextMessage(plaintext, session.getFingerprint());
+
+			} catch (NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException
+					| InvalidAlgorithmParameterException | IllegalBlockSizeException
+					| BadPaddingException | NoSuchProviderException e) {
+				throw new CryptoFailedException(e);
+			}
+		}
+		return plaintextMessage;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/XmppAxolotlSession.java b/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/XmppAxolotlSession.java
new file mode 100644
index 00000000..47b2133a
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/axolotl/XmppAxolotlSession.java
@@ -0,0 +1,221 @@
+package de.thedevstack.conversationsplus.crypto.axolotl;
+
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.util.Log;
+
+import org.whispersystems.libaxolotl.AxolotlAddress;
+import org.whispersystems.libaxolotl.DuplicateMessageException;
+import org.whispersystems.libaxolotl.IdentityKey;
+import org.whispersystems.libaxolotl.InvalidKeyException;
+import org.whispersystems.libaxolotl.InvalidKeyIdException;
+import org.whispersystems.libaxolotl.InvalidMessageException;
+import org.whispersystems.libaxolotl.InvalidVersionException;
+import org.whispersystems.libaxolotl.LegacyMessageException;
+import org.whispersystems.libaxolotl.NoSessionException;
+import org.whispersystems.libaxolotl.SessionCipher;
+import org.whispersystems.libaxolotl.UntrustedIdentityException;
+import org.whispersystems.libaxolotl.protocol.CiphertextMessage;
+import org.whispersystems.libaxolotl.protocol.PreKeyWhisperMessage;
+import org.whispersystems.libaxolotl.protocol.WhisperMessage;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.entities.Account;
+
+public class XmppAxolotlSession {
+	private final SessionCipher cipher;
+	private final SQLiteAxolotlStore sqLiteAxolotlStore;
+	private final AxolotlAddress remoteAddress;
+	private final Account account;
+	private IdentityKey identityKey;
+	private Integer preKeyId = null;
+	private boolean fresh = true;
+
+	public enum Trust {
+		UNDECIDED(0),
+		TRUSTED(1),
+		UNTRUSTED(2),
+		COMPROMISED(3),
+		INACTIVE_TRUSTED(4),
+		INACTIVE_UNDECIDED(5),
+		INACTIVE_UNTRUSTED(6),
+		TRUSTED_X509(7),
+		INACTIVE_TRUSTED_X509(8);
+
+		private static final Map<Integer, Trust> trustsByValue = new HashMap<>();
+
+		static {
+			for (Trust trust : Trust.values()) {
+				trustsByValue.put(trust.getCode(), trust);
+			}
+		}
+
+		private final int code;
+
+		Trust(int code) {
+			this.code = code;
+		}
+
+		public int getCode() {
+			return this.code;
+		}
+
+		public String toString() {
+			switch (this) {
+				case UNDECIDED:
+					return "Trust undecided " + getCode();
+				case TRUSTED:
+					return "Trusted " + getCode();
+				case COMPROMISED:
+					return "Compromised " + getCode();
+				case INACTIVE_TRUSTED:
+					return "Inactive (Trusted)" + getCode();
+				case INACTIVE_UNDECIDED:
+					return "Inactive (Undecided)" + getCode();
+				case INACTIVE_UNTRUSTED:
+					return "Inactive (Untrusted)" + getCode();
+				case TRUSTED_X509:
+					return "Trusted (X509) " + getCode();
+				case INACTIVE_TRUSTED_X509:
+					return "Inactive (Trusted (X509)) " + getCode();
+				case UNTRUSTED:
+				default:
+					return "Untrusted " + getCode();
+			}
+		}
+
+		public static Trust fromBoolean(Boolean trusted) {
+			return trusted ? TRUSTED : UNTRUSTED;
+		}
+
+		public static Trust fromCode(int code) {
+			return trustsByValue.get(code);
+		}
+
+		public boolean trusted() {
+			return this == TRUSTED_X509 || this == TRUSTED;
+		}
+
+		public boolean trustedInactive() {
+			return this == INACTIVE_TRUSTED_X509 || this == INACTIVE_TRUSTED;
+		}
+	}
+
+	public XmppAxolotlSession(Account account, SQLiteAxolotlStore store, AxolotlAddress remoteAddress, IdentityKey identityKey) {
+		this(account, store, remoteAddress);
+		this.identityKey = identityKey;
+	}
+
+	public XmppAxolotlSession(Account account, SQLiteAxolotlStore store, AxolotlAddress remoteAddress) {
+		this.cipher = new SessionCipher(store, remoteAddress);
+		this.remoteAddress = remoteAddress;
+		this.sqLiteAxolotlStore = store;
+		this.account = account;
+	}
+
+	public Integer getPreKeyId() {
+		return preKeyId;
+	}
+
+	public void resetPreKeyId() {
+
+		preKeyId = null;
+	}
+
+	public String getFingerprint() {
+		return identityKey == null ? null : identityKey.getFingerprint().replaceAll("\\s", "");
+	}
+
+	public IdentityKey getIdentityKey() {
+		return identityKey;
+	}
+
+	public AxolotlAddress getRemoteAddress() {
+		return remoteAddress;
+	}
+
+	public boolean isFresh() {
+		return fresh;
+	}
+
+	public void setNotFresh() {
+		this.fresh = false;
+	}
+
+	protected void setTrust(Trust trust) {
+		sqLiteAxolotlStore.setFingerprintTrust(getFingerprint(), trust);
+	}
+
+	protected Trust getTrust() {
+		Trust trust = sqLiteAxolotlStore.getFingerprintTrust(getFingerprint());
+		return (trust == null) ? Trust.UNDECIDED : trust;
+	}
+
+	@Nullable
+	public byte[] processReceiving(byte[] encryptedKey) {
+		byte[] plaintext = null;
+		Trust trust = getTrust();
+		switch (trust) {
+			case INACTIVE_TRUSTED:
+			case UNDECIDED:
+			case UNTRUSTED:
+			case TRUSTED:
+			case INACTIVE_TRUSTED_X509:
+			case TRUSTED_X509:
+				try {
+					try {
+						PreKeyWhisperMessage message = new PreKeyWhisperMessage(encryptedKey);
+						Log.i(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "PreKeyWhisperMessage received, new session ID:" + message.getSignedPreKeyId() + "/" + message.getPreKeyId());
+						IdentityKey msgIdentityKey = message.getIdentityKey();
+						if (this.identityKey != null && !this.identityKey.equals(msgIdentityKey)) {
+							Log.e(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Had session with fingerprint " + this.getFingerprint() + ", received message with fingerprint " + msgIdentityKey.getFingerprint());
+						} else {
+							this.identityKey = msgIdentityKey;
+							plaintext = cipher.decrypt(message);
+							if (message.getPreKeyId().isPresent()) {
+								preKeyId = message.getPreKeyId().get();
+							}
+						}
+					} catch (InvalidMessageException | InvalidVersionException e) {
+						Log.i(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "WhisperMessage received");
+						WhisperMessage message = new WhisperMessage(encryptedKey);
+						plaintext = cipher.decrypt(message);
+					} catch (InvalidKeyException | InvalidKeyIdException | UntrustedIdentityException e) {
+						Log.w(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Error decrypting axolotl header, " + e.getClass().getName() + ": " + e.getMessage());
+					}
+				} catch (LegacyMessageException | InvalidMessageException | DuplicateMessageException | NoSessionException e) {
+					Log.w(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Error decrypting axolotl header, " + e.getClass().getName() + ": " + e.getMessage());
+				}
+
+				if (plaintext != null) {
+					if (trust == Trust.INACTIVE_TRUSTED) {
+						setTrust(Trust.TRUSTED);
+					} else if (trust == Trust.INACTIVE_TRUSTED_X509) {
+						setTrust(Trust.TRUSTED_X509);
+					}
+				}
+
+				break;
+
+			case COMPROMISED:
+			default:
+				// ignore
+				break;
+		}
+		return plaintext;
+	}
+
+	@Nullable
+	public byte[] processSending(@NonNull byte[] outgoingMessage) {
+		Trust trust = getTrust();
+		if (trust.trusted()) {
+			CiphertextMessage ciphertextMessage = cipher.encrypt(outgoingMessage);
+			return ciphertextMessage.serialize();
+		} else {
+			return null;
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/External.java b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/External.java
new file mode 100644
index 00000000..dc50cbbe
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/External.java
@@ -0,0 +1,30 @@
+package de.thedevstack.conversationsplus.crypto.sasl;
+
+import android.util.Base64;
+
+import java.security.SecureRandom;
+
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.xml.TagWriter;
+
+public class External extends SaslMechanism {
+
+	public External(TagWriter tagWriter, Account account, SecureRandom rng) {
+		super(tagWriter, account, rng);
+	}
+
+	@Override
+	public int getPriority() {
+		return 25;
+	}
+
+	@Override
+	public String getMechanism() {
+		return "EXTERNAL";
+	}
+
+	@Override
+	public String getClientFirstMessage() {
+		return Base64.encodeToString(account.getJid().toBareJid().toString().getBytes(),Base64.NO_WRAP);
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/SaslMechanism.java b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/SaslMechanism.java
index ed2764c8..1f6d2bde 100644
--- a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/SaslMechanism.java
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/SaslMechanism.java
@@ -11,7 +11,7 @@ public abstract class SaslMechanism {
 	final protected Account account;
 	final protected SecureRandom rng;
 
-	protected static enum State {
+	protected enum State {
 		INITIAL,
 		AUTH_TEXT_SENT,
 		RESPONSE_SENT,
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/ScramSha1.java b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/ScramSha1.java
index a991b1d7..3540d2cf 100644
--- a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/ScramSha1.java
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/ScramSha1.java
@@ -21,7 +21,6 @@ public class ScramSha1 extends SaslMechanism {
 	// TODO: When channel binding (SCRAM-SHA1-PLUS) is supported in future, generalize this to indicate support and/or usage.
 	final private static String GS2_HEADER = "n,,";
 	private String clientFirstMessageBare;
-	private byte[] serverFirstMessage;
 	final private String clientNonce;
 	private byte[] serverSignature = null;
 	private static HMac HMAC;
@@ -101,7 +100,10 @@ public class ScramSha1 extends SaslMechanism {
 	public String getResponse(final String challenge) throws AuthenticationException {
 		switch (state) {
 			case AUTH_TEXT_SENT:
-				serverFirstMessage = Base64.decode(challenge, Base64.DEFAULT);
+				if (challenge == null) {
+					throw new AuthenticationException("challenge can not be null");
+				}
+				byte[] serverFirstMessage = Base64.decode(challenge, Base64.DEFAULT);
 				final Tokenizer tokenizer = new Tokenizer(serverFirstMessage);
 				String nonce = "";
 				int iterationCount = -1;
diff --git a/src/main/java/de/thedevstack/conversationsplus/dto/SrvRecord.java b/src/main/java/de/thedevstack/conversationsplus/dto/SrvRecord.java
index 3bc79c4f..1e0eebc7 100644
--- a/src/main/java/de/thedevstack/conversationsplus/dto/SrvRecord.java
+++ b/src/main/java/de/thedevstack/conversationsplus/dto/SrvRecord.java
@@ -8,6 +8,7 @@ public class SrvRecord implements Comparable<SrvRecord> {
     private int priority;
     private String name;
     private int port;
+    private boolean useTls = false;
 
     public SrvRecord(int priority, String name, int port) {
         this.priority = priority;
@@ -15,6 +16,13 @@ public class SrvRecord implements Comparable<SrvRecord> {
         this.port = port;
     }
 
+    public SrvRecord(int priority, String name, int port, boolean useTls) {
+        this.priority = priority;
+        this.name = name;
+        this.port = port;
+        this.useTls = useTls;
+    }
+
     /**
      * Compares this record to the specified record to determine their relative
      * order.
@@ -50,4 +58,8 @@ public class SrvRecord implements Comparable<SrvRecord> {
     public int getPriority() {
         return priority;
     }
+
+    public boolean isUseTls() {
+        return useTls;
+    }
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/Account.java b/src/main/java/de/thedevstack/conversationsplus/entities/Account.java
index 8d879fa0..f7dee013 100644
--- a/src/main/java/de/thedevstack/conversationsplus/entities/Account.java
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/Account.java
@@ -3,6 +3,7 @@ package de.thedevstack.conversationsplus.entities;
 import android.content.ContentValues;
 import android.database.Cursor;
 import android.os.SystemClock;
+import android.util.Pair;
 
 import net.java.otr4j.crypto.OtrCryptoEngineImpl;
 import net.java.otr4j.crypto.OtrCryptoException;
@@ -13,13 +14,19 @@ import org.json.JSONObject;
 import java.security.PublicKey;
 import java.security.interfaces.DSAPublicKey;
 import java.util.Collection;
+import java.util.HashSet;
 import java.util.List;
 import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.concurrent.CopyOnWriteArraySet;
 
+import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
 import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.R;
 import de.thedevstack.conversationsplus.crypto.OtrService;
+import de.thedevstack.conversationsplus.crypto.PgpDecryptionService;
+import de.thedevstack.conversationsplus.crypto.axolotl.AxolotlService;
+import de.thedevstack.conversationsplus.crypto.axolotl.AxolotlServiceImpl;
+import de.thedevstack.conversationsplus.crypto.axolotl.AxolotlServiceStub;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
 import de.thedevstack.conversationsplus.xmpp.XmppConnection;
 import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
@@ -36,6 +43,9 @@ public class Account extends AbstractEntity {
 	public static final String ROSTERVERSION = "rosterversion";
 	public static final String KEYS = "keys";
 	public static final String AVATAR = "avatar";
+	public static final String DISPLAY_NAME = "display_name";
+	public static final String HOSTNAME = "hostname";
+	public static final String PORT = "port";
 
 	public static final String PINNED_MECHANISM_KEY = "pinned_mechanism";
 
@@ -43,12 +53,29 @@ public class Account extends AbstractEntity {
 	public static final int OPTION_DISABLED = 1;
 	public static final int OPTION_REGISTER = 2;
 	public static final int OPTION_USECOMPRESSION = 3;
+	public final HashSet<Pair<String, String>> inProgressDiscoFetches = new HashSet<>();
 
 	public boolean httpUploadAvailable() {
 		return xmppConnection != null && xmppConnection.getFeatures().httpUpload();
 	}
 
-	public static enum State {
+	public void setDisplayName(String displayName) {
+		this.displayName = displayName;
+	}
+
+	public String getDisplayName() {
+		return displayName;
+	}
+
+	public XmppConnection.Identity getServerIdentity() {
+		if (xmppConnection == null) {
+			return XmppConnection.Identity.UNKNOWN;
+		} else {
+			return xmppConnection.getServerIdentity();
+		}
+	}
+
+	public enum State {
 		DISABLED,
 		OFFLINE,
 		CONNECTING,
@@ -61,7 +88,8 @@ public class Account extends AbstractEntity {
 		REGISTRATION_SUCCESSFUL,
 		REGISTRATION_NOT_SUPPORTED(true),
 		SECURITY_ERROR(true),
-		INCOMPATIBLE_SERVER(true);
+		INCOMPATIBLE_SERVER(true),
+		TOR_NOT_AVAILABLE(true);
 
 		private final boolean isError;
 
@@ -105,6 +133,8 @@ public class Account extends AbstractEntity {
 					return R.string.account_status_security_error;
 				case INCOMPATIBLE_SERVER:
 					return R.string.account_status_incompatible_server;
+				case TOR_NOT_AVAILABLE:
+					return R.string.account_status_tor_unavailable;
 				default:
 					return R.string.account_status_unknown;
 			}
@@ -113,6 +143,10 @@ public class Account extends AbstractEntity {
 
 	public List<Conversation> pendingConferenceJoins = new CopyOnWriteArrayList<>();
 	public List<Conversation> pendingConferenceLeaves = new CopyOnWriteArrayList<>();
+
+	private static final String KEY_PGP_SIGNATURE = "pgp_signature";
+	private static final String KEY_PGP_ID = "pgp_id";
+
 	protected Jid jid;
 	protected String password;
 	protected int options = 0;
@@ -120,15 +154,19 @@ public class Account extends AbstractEntity {
 	protected State status = State.OFFLINE;
 	protected JSONObject keys = new JSONObject();
 	protected String avatar;
+	protected String displayName = null;
+	protected String hostname = null;
+	protected int port = 5222;
 	protected boolean online = false;
 	private OtrService mOtrService = null;
+	private AxolotlService axolotlService = null;
+	private PgpDecryptionService pgpDecryptionService = null;
 	private XmppConnection xmppConnection = null;
 	private long mEndGracePeriod = 0L;
 	private String otrFingerprint;
 	private final Roster roster = new Roster(this);
 	private List<Bookmark> bookmarks = new CopyOnWriteArrayList<>();
 	private final Collection<Jid> blocklist = new CopyOnWriteArraySet<>();
-	private XmppConnectionService mXmppConnectionService;
 
 	public Account() {
 		this.uuid = "0";
@@ -136,12 +174,12 @@ public class Account extends AbstractEntity {
 
 	public Account(final Jid jid, final String password) {
 		this(java.util.UUID.randomUUID().toString(), jid,
-				password, 0, null, "", null);
+				password, 0, null, "", null, null, null, 5222);
 	}
 
-	public Account(final String uuid, final Jid jid,
+	private Account(final String uuid, final Jid jid,
 			final String password, final int options, final String rosterVersion, final String keys,
-			final String avatar) {
+			final String avatar, String displayName, String hostname, int port) {
 		this.uuid = uuid;
 		this.jid = jid;
 		if (jid.isBareJid()) {
@@ -156,6 +194,9 @@ public class Account extends AbstractEntity {
 			this.keys = new JSONObject();
 		}
 		this.avatar = avatar;
+		this.displayName = displayName;
+		this.hostname = hostname;
+		this.port = port;
 	}
 
 	public static Account fromCursor(final Cursor cursor) {
@@ -171,7 +212,10 @@ public class Account extends AbstractEntity {
 				cursor.getInt(cursor.getColumnIndex(OPTIONS)),
 				cursor.getString(cursor.getColumnIndex(ROSTERVERSION)),
 				cursor.getString(cursor.getColumnIndex(KEYS)),
-				cursor.getString(cursor.getColumnIndex(AVATAR)));
+				cursor.getString(cursor.getColumnIndex(AVATAR)),
+				cursor.getString(cursor.getColumnIndex(DISPLAY_NAME)),
+				cursor.getString(cursor.getColumnIndex(HOSTNAME)),
+				cursor.getInt(cursor.getColumnIndex(PORT)));
 	}
 
 	public boolean isOptionSet(final int option) {
@@ -190,18 +234,14 @@ public class Account extends AbstractEntity {
 		return jid.getLocalpart();
 	}
 
-	public void setUsername(final String username) throws InvalidJidException {
-		jid = Jid.fromParts(username, jid.getDomainpart(), jid.getResourcepart());
+	public void setJid(final Jid jid) {
+		this.jid = jid;
 	}
 
 	public Jid getServer() {
 		return jid.toDomainJid();
 	}
 
-	public void setServer(final String server) throws InvalidJidException {
-		jid = Jid.fromParts(jid.getLocalpart(), server, jid.getResourcepart());
-	}
-
 	public String getPassword() {
 		return password;
 	}
@@ -210,6 +250,22 @@ public class Account extends AbstractEntity {
 		this.password = password;
 	}
 
+	public void setHostname(String hostname) {
+		this.hostname = hostname;
+	}
+
+	public String getHostname() {
+		return this.hostname == null ? "" : this.hostname;
+	}
+
+	public void setPort(int port) {
+		this.port = port;
+	}
+
+	public int getPort() {
+		return this.port;
+	}
+
 	public State getStatus() {
 		if (isOptionSet(OPTION_DISABLED)) {
 			return State.DISABLED;
@@ -227,7 +283,7 @@ public class Account extends AbstractEntity {
 	}
 
 	public boolean hasErrorStatus() {
-		return getXmppConnection() != null && getStatus().isError() && getXmppConnection().getAttempt() >= 2;
+		return getXmppConnection() != null && getStatus().isError() && getXmppConnection().getAttempt() >= 3;
 	}
 
 	public String getResource() {
@@ -255,6 +311,10 @@ public class Account extends AbstractEntity {
 		return keys;
 	}
 
+	public String getKey(final String name) {
+		return this.keys.optString(name, null);
+	}
+
 	public boolean setKey(final String keyName, final String keyValue) {
 		try {
 			this.keys.put(keyName, keyValue);
@@ -264,6 +324,14 @@ public class Account extends AbstractEntity {
 		}
 	}
 
+	public boolean setPrivateKeyAlias(String alias) {
+		return setKey("private_key_alias", alias);
+	}
+
+	public String getPrivateKeyAlias() {
+		return getKey("private_key_alias");
+	}
+
 	@Override
 	public ContentValues getContentValues() {
 		final ContentValues values = new ContentValues();
@@ -275,18 +343,38 @@ public class Account extends AbstractEntity {
 		values.put(KEYS, this.keys.toString());
 		values.put(ROSTERVERSION, rosterVersion);
 		values.put(AVATAR, avatar);
+		values.put(DISPLAY_NAME, displayName);
+		values.put(HOSTNAME, hostname);
+		values.put(PORT, port);
 		return values;
 	}
 
+	public AxolotlService getAxolotlService() {
+		return axolotlService;
+	}
+
 	public void initAccountServices(final XmppConnectionService context) {
-		this.mXmppConnectionService = context;
 		this.mOtrService = new OtrService(context, this);
+        if (ConversationsPlusPreferences.omemoEnabled()) {
+            this.axolotlService = new AxolotlServiceImpl(this, context);
+            if (xmppConnection != null) {
+                xmppConnection.addOnAdvancedStreamFeaturesAvailableListener(axolotlService);
+            }
+        } else {
+            this.axolotlService = new AxolotlServiceStub();
+        }
+
+		this.pgpDecryptionService = new PgpDecryptionService(context);
 	}
 
 	public OtrService getOtrService() {
 		return this.mOtrService;
 	}
 
+	public PgpDecryptionService getPgpDecryptionService() {
+		return pgpDecryptionService;
+	}
+
 	public XmppConnection getXmppConnection() {
 		return this.xmppConnection;
 	}
@@ -332,17 +420,56 @@ public class Account extends AbstractEntity {
 	}
 
 	public String getPgpSignature() {
-		if (keys.has("pgp_signature")) {
-			try {
-				return keys.getString("pgp_signature");
-			} catch (final JSONException e) {
+		try {
+			if (keys.has(KEY_PGP_SIGNATURE) && !"null".equals(keys.getString(KEY_PGP_SIGNATURE))) {
+				return keys.getString(KEY_PGP_SIGNATURE);
+			} else {
 				return null;
 			}
-		} else {
+		} catch (final JSONException e) {
 			return null;
 		}
 	}
 
+	public boolean setPgpSignature(String signature) {
+		try {
+			keys.put(KEY_PGP_SIGNATURE, signature);
+		} catch (JSONException e) {
+			return false;
+		}
+		return true;
+	}
+
+	public boolean unsetPgpSignature() {
+		try {
+			keys.put(KEY_PGP_SIGNATURE, JSONObject.NULL);
+		} catch (JSONException e) {
+			return false;
+		}
+		return true;
+	}
+
+	public long getPgpId() {
+		if (keys.has(KEY_PGP_ID)) {
+			try {
+				return keys.getLong(KEY_PGP_ID);
+			} catch (JSONException e) {
+				return -1;
+			}
+		} else {
+			return -1;
+		}
+	}
+
+	public boolean setPgpSignId(long pgpID) {
+		try {
+			keys.put(KEY_PGP_ID, pgpID);
+		} catch (JSONException e) {
+			return false;
+		}
+		return true;
+	}
+
 	public Roster getRoster() {
 		return this.roster;
 	}
@@ -420,8 +547,4 @@ public class Account extends AbstractEntity {
 	public boolean isOnlineAndConnected() {
 		return this.getStatus() == State.ONLINE && this.getXmppConnection() != null;
 	}
-
-	public XmppConnectionService getXmppConnectionService() {
-		return mXmppConnectionService;
-	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/Bookmark.java b/src/main/java/de/thedevstack/conversationsplus/entities/Bookmark.java
index 9e67bf2d..07a77eae 100644
--- a/src/main/java/de/thedevstack/conversationsplus/entities/Bookmark.java
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/Bookmark.java
@@ -2,12 +2,11 @@ package de.thedevstack.conversationsplus.entities;
 
 import android.graphics.Color;
 
-import android.graphics.Color;
-
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Locale;
 
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.utils.UIHelper;
 import de.thedevstack.conversationsplus.xml.Element;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
@@ -54,14 +53,26 @@ public class Bookmark extends Element implements ListItem {
 		if (this.mJoinedConversation != null
 				&& (this.mJoinedConversation.getMucOptions().getSubject() != null)) {
 			return this.mJoinedConversation.getMucOptions().getSubject();
-		} else if (getName() != null) {
-			return getName();
+		} else if (getBookmarkName() != null) {
+			return getBookmarkName();
 		} else {
 			return this.getJid().getLocalpart();
 		}
 	}
 
 	@Override
+	public String getDisplayJid() {
+		Jid jid = getJid();
+		if (Config.LOCK_DOMAINS_IN_CONVERSATIONS && jid != null && jid.getDomainpart().equals(Config.CONFERENCE_DOMAIN_LOCK)) {
+			return jid.getLocalpart();
+		} else if (jid != null) {
+			return jid.toString();
+		} else {
+			return null;
+		}
+	}
+
+	@Override
 	public Jid getJid() {
 		return this.getAttributeAsJid("jid");
 	}
@@ -143,12 +154,18 @@ public class Bookmark extends Element implements ListItem {
 		this.mJoinedConversation = conversation;
 	}
 
-	public String getName() {
+	public String getBookmarkName() {
 		return this.getAttribute("name");
 	}
 
-	public void setName(String name) {
-		this.name = name;
+	public boolean setBookmarkName(String name) {
+		String before = getBookmarkName();
+		if (name != null && !name.equals(before)) {
+			this.setAttribute("name", name);
+			return true;
+		} else {
+			return false;
+		}
 	}
 
 	public void unregisterConversation() {
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/Contact.java b/src/main/java/de/thedevstack/conversationsplus/entities/Contact.java
index ca734403..74d76f13 100644
--- a/src/main/java/de/thedevstack/conversationsplus/entities/Contact.java
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/Contact.java
@@ -12,6 +12,7 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.Locale;
 
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.utils.UIHelper;
 import de.thedevstack.conversationsplus.xml.Element;
 import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
@@ -38,13 +39,14 @@ public class Contact implements ListItem, Blockable {
 	protected String systemName;
 	protected String serverName;
 	protected String presenceName;
+	protected String commonName;
 	protected Jid jid;
 	protected int subscription = 0;
 	protected String systemAccount;
 	protected String photoUri;
 	protected JSONObject keys = new JSONObject();
 	protected JSONArray groups = new JSONArray();
-	protected Presences presences = new Presences();
+	protected final Presences presences = new Presences();
 	protected Account account;
 	protected Avatar avatar;
 
@@ -105,7 +107,9 @@ public class Contact implements ListItem, Blockable {
 	}
 
 	public String getDisplayName() {
-		if (this.systemName != null) {
+		if (this.commonName != null && Config.X509_VERIFICATION) {
+			return this.commonName;
+		} else if (this.systemName != null) {
 			return this.systemName;
 		} else if (this.serverName != null) {
 			return this.serverName;
@@ -118,6 +122,17 @@ public class Contact implements ListItem, Blockable {
 		}
 	}
 
+	@Override
+	public String getDisplayJid() {
+		if (Config.LOCK_DOMAINS_IN_CONVERSATIONS && jid != null && jid.getDomainpart().equals(Config.DOMAIN_LOCK)) {
+			return jid.getLocalpart();
+		} else if (jid != null) {
+			return jid.toString();
+		} else {
+			return null;
+		}
+	}
+
 	public String getProfilePhoto() {
 		return this.photoUri;
 	}
@@ -133,17 +148,17 @@ public class Contact implements ListItem, Blockable {
 			tags.add(new Tag(group, UIHelper.getColorForName(group)));
 		}
 		switch (getMostAvailableStatus()) {
-			case Presences.CHAT:
-			case Presences.ONLINE:
+			case CHAT:
+			case ONLINE:
 				tags.add(new Tag("online", 0xff259b24));
 				break;
-			case Presences.AWAY:
+			case AWAY:
 				tags.add(new Tag("away", 0xffff9800));
 				break;
-			case Presences.XA:
+			case XA:
 				tags.add(new Tag("not available", 0xfff44336));
 				break;
-			case Presences.DND:
+			case DND:
 				tags.add(new Tag("dnd", 0xfff44336));
 				break;
 		}
@@ -189,20 +204,22 @@ public class Contact implements ListItem, Blockable {
 	}
 
 	public ContentValues getContentValues() {
-		final ContentValues values = new ContentValues();
-		values.put(ACCOUNT, accountUuid);
-		values.put(SYSTEMNAME, systemName);
-		values.put(SERVERNAME, serverName);
-		values.put(JID, jid.toString());
-		values.put(OPTIONS, subscription);
-		values.put(SYSTEMACCOUNT, systemAccount);
-		values.put(PHOTOURI, photoUri);
-		values.put(KEYS, keys.toString());
-		values.put(AVATAR, avatar == null ? null : avatar.getFilename());
-		values.put(LAST_PRESENCE, lastseen.presence);
-		values.put(LAST_TIME, lastseen.time);
-		values.put(GROUPS, groups.toString());
-		return values;
+		synchronized (this.keys) {
+			final ContentValues values = new ContentValues();
+			values.put(ACCOUNT, accountUuid);
+			values.put(SYSTEMNAME, systemName);
+			values.put(SERVERNAME, serverName);
+			values.put(JID, jid.toString());
+			values.put(OPTIONS, subscription);
+			values.put(SYSTEMACCOUNT, systemAccount);
+			values.put(PHOTOURI, photoUri);
+			values.put(KEYS, keys.toString());
+			values.put(AVATAR, avatar == null ? null : avatar.getFilename());
+			values.put(LAST_PRESENCE, lastseen.presence);
+			values.put(LAST_TIME, lastseen.time);
+			values.put(GROUPS, groups.toString());
+			return values;
+		}
 	}
 
 	public int getSubscription() {
@@ -222,12 +239,8 @@ public class Contact implements ListItem, Blockable {
 		return this.presences;
 	}
 
-	public void setPresences(Presences pres) {
-		this.presences = pres;
-	}
-
-	public void updatePresence(final String resource, final int status) {
-		this.presences.updatePresence(resource, status);
+	public void updatePresence(final String resource, final Presence presence) {
+		this.presences.updatePresence(resource, presence);
 	}
 
 	public void removePresence(final String resource) {
@@ -239,8 +252,13 @@ public class Contact implements ListItem, Blockable {
 		this.resetOption(Options.PENDING_SUBSCRIPTION_REQUEST);
 	}
 
-	public int getMostAvailableStatus() {
-		return this.presences.getMostAvailableStatus();
+	public Presence.Status getMostAvailableStatus() {
+		Presence p = this.presences.getMostAvailablePresence();
+		if (p == null) {
+			return Presence.Status.OFFLINE;
+		}
+
+		return p.getStatus();
 	}
 
 	public boolean setPhotoUri(String uri) {
@@ -287,60 +305,65 @@ public class Contact implements ListItem, Blockable {
 	}
 
 	public ArrayList<String> getOtrFingerprints() {
-		final ArrayList<String> fingerprints = new ArrayList<String>();
-		try {
-			if (this.keys.has("otr_fingerprints")) {
-				final JSONArray prints = this.keys.getJSONArray("otr_fingerprints");
-				for (int i = 0; i < prints.length(); ++i) {
-					final String print = prints.isNull(i) ? null : prints.getString(i);
-					if (print != null && !print.isEmpty()) {
-						fingerprints.add(prints.getString(i));
+		synchronized (this.keys) {
+			final ArrayList<String> fingerprints = new ArrayList<String>();
+			try {
+				if (this.keys.has("otr_fingerprints")) {
+					final JSONArray prints = this.keys.getJSONArray("otr_fingerprints");
+					for (int i = 0; i < prints.length(); ++i) {
+						final String print = prints.isNull(i) ? null : prints.getString(i);
+						if (print != null && !print.isEmpty()) {
+							fingerprints.add(prints.getString(i));
+						}
 					}
 				}
-			}
-		} catch (final JSONException ignored) {
+			} catch (final JSONException ignored) {
 
+			}
+			return fingerprints;
 		}
-		return fingerprints;
 	}
-
 	public boolean addOtrFingerprint(String print) {
-		if (getOtrFingerprints().contains(print)) {
-			return false;
-		}
-		try {
-			JSONArray fingerprints;
-			if (!this.keys.has("otr_fingerprints")) {
-				fingerprints = new JSONArray();
-
-			} else {
-				fingerprints = this.keys.getJSONArray("otr_fingerprints");
+		synchronized (this.keys) {
+			if (getOtrFingerprints().contains(print)) {
+				return false;
+			}
+			try {
+				JSONArray fingerprints;
+				if (!this.keys.has("otr_fingerprints")) {
+					fingerprints = new JSONArray();
+				} else {
+					fingerprints = this.keys.getJSONArray("otr_fingerprints");
+				}
+				fingerprints.put(print);
+				this.keys.put("otr_fingerprints", fingerprints);
+				return true;
+			} catch (final JSONException ignored) {
+				return false;
 			}
-			fingerprints.put(print);
-			this.keys.put("otr_fingerprints", fingerprints);
-			return true;
-		} catch (final JSONException ignored) {
-			return false;
 		}
 	}
 
 	public long getPgpKeyId() {
-		if (this.keys.has("pgp_keyid")) {
-			try {
-				return this.keys.getLong("pgp_keyid");
-			} catch (JSONException e) {
+		synchronized (this.keys) {
+			if (this.keys.has("pgp_keyid")) {
+				try {
+					return this.keys.getLong("pgp_keyid");
+				} catch (JSONException e) {
+					return 0;
+				}
+			} else {
 				return 0;
 			}
-		} else {
-			return 0;
 		}
 	}
 
 	public void setPgpKeyId(long keyId) {
-		try {
-			this.keys.put("pgp_keyid", keyId);
-		} catch (final JSONException ignored) {
-
+		synchronized (this.keys) {
+			try {
+				this.keys.put("pgp_keyid", keyId);
+			} catch (final JSONException ignored) {
+			}
 		}
 	}
 
@@ -376,11 +399,13 @@ public class Contact implements ListItem, Blockable {
 					this.resetOption(Options.TO);
 					this.setOption(Options.FROM);
 					this.resetOption(Options.PREEMPTIVE_GRANT);
+					this.resetOption(Options.PENDING_SUBSCRIPTION_REQUEST);
 					break;
 				case "both":
 					this.setOption(Options.TO);
 					this.setOption(Options.FROM);
 					this.resetOption(Options.PREEMPTIVE_GRANT);
+					this.resetOption(Options.PENDING_SUBSCRIPTION_REQUEST);
 					break;
 				case "none":
 					this.resetOption(Options.FROM);
@@ -447,24 +472,26 @@ public class Contact implements ListItem, Blockable {
 	}
 
 	public boolean deleteOtrFingerprint(String fingerprint) {
-		boolean success = false;
-		try {
-			if (this.keys.has("otr_fingerprints")) {
-				JSONArray newPrints = new JSONArray();
-				JSONArray oldPrints = this.keys
-					.getJSONArray("otr_fingerprints");
-				for (int i = 0; i < oldPrints.length(); ++i) {
-					if (!oldPrints.getString(i).equals(fingerprint)) {
-						newPrints.put(oldPrints.getString(i));
-					} else {
-						success = true;
+		synchronized (this.keys) {
+			boolean success = false;
+			try {
+				if (this.keys.has("otr_fingerprints")) {
+					JSONArray newPrints = new JSONArray();
+					JSONArray oldPrints = this.keys
+							.getJSONArray("otr_fingerprints");
+					for (int i = 0; i < oldPrints.length(); ++i) {
+						if (!oldPrints.getString(i).equals(fingerprint)) {
+							newPrints.put(oldPrints.getString(i));
+						} else {
+							success = true;
+						}
 					}
+					this.keys.put("otr_fingerprints", newPrints);
 				}
-				this.keys.put("otr_fingerprints", newPrints);
+				return success;
+			} catch (JSONException e) {
+				return false;
 			}
-			return success;
-		} catch (JSONException e) {
-			return false;
 		}
 	}
 
@@ -504,6 +531,10 @@ public class Contact implements ListItem, Blockable {
 		return account.getJid().toBareJid().equals(getJid().toBareJid());
 	}
 
+	public void setCommonName(String cn) {
+		this.commonName = cn;
+	}
+
 	public static class Lastseen {
 		public long time;
 		public String presence;
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/Conversation.java b/src/main/java/de/thedevstack/conversationsplus/entities/Conversation.java
index e26f7944..0b70d938 100644
--- a/src/main/java/de/thedevstack/conversationsplus/entities/Conversation.java
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/Conversation.java
@@ -19,8 +19,9 @@ import java.util.Comparator;
 import java.util.Iterator;
 import java.util.List;
 
+import de.thedevstack.conversationsplus.utils.MessageUtil;
 import de.thedevstack.conversationsplus.Config;
-import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
+import de.thedevstack.conversationsplus.crypto.axolotl.AxolotlService;
 import de.thedevstack.conversationsplus.xmpp.chatstate.ChatState;
 import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
@@ -47,7 +48,7 @@ public class Conversation extends AbstractEntity implements Blockable {
 	public static final String ATTRIBUTE_NEXT_ENCRYPTION = "next_encryption";
 	public static final String ATTRIBUTE_MUC_PASSWORD = "muc_password";
 	public static final String ATTRIBUTE_MUTED_TILL = "muted_till";
-	public static final String ATTRIBUTE_LAST_MESSAGE_TRANSMITTED = "last_message_transmitted";
+	public static final String ATTRIBUTE_ALWAYS_NOTIFY = "always_notify";
 
 	private String name;
 	private String contactUuid;
@@ -81,6 +82,8 @@ public class Conversation extends AbstractEntity implements Blockable {
 	private ChatState mOutgoingChatState = Config.DEFAULT_CHATSTATE;
 	private ChatState mIncomingChatState = Config.DEFAULT_CHATSTATE;
 	private String mLastReceivedOtrMessageId = null;
+	private String mFirstMamReference = null;
+	private Message correctingMessage;
 
 	public boolean hasMessagesLeftOnServer() {
 		return messagesLeftOnServer;
@@ -112,6 +115,16 @@ public class Conversation extends AbstractEntity implements Blockable {
 		}
 	}
 
+	public void findUnreadMessages(OnMessageFound onMessageFound) {
+		synchronized (this.messages) {
+			for(Message message : this.messages) {
+				if (!message.isRead()) {
+					onMessageFound.onMessageFound(message);
+				}
+			}
+		}
+	}
+
 	public void findMessagesWithFiles(final OnMessageFound onMessageFound) {
 		synchronized (this.messages) {
 			for (final Message message : this.messages) {
@@ -180,13 +193,13 @@ public class Conversation extends AbstractEntity implements Blockable {
 		}
 	}
 
-	public void findUnsentMessagesWithOtrEncryption(OnMessageFound onMessageFound) {
+	public void findUnsentMessagesWithEncryption(int encryptionType, OnMessageFound onMessageFound) {
 		synchronized (this.messages) {
 			for (Message message : this.messages) {
 				if ((message.getStatus() == Message.STATUS_UNSEND || message.getStatus() == Message.STATUS_WAITING)
-						&& (message.getEncryption() == Message.ENCRYPTION_OTR)) {
+						&& (message.getEncryption() == encryptionType)) {
 					onMessageFound.onMessageFound(message);
-						}
+				}
 			}
 		}
 	}
@@ -202,14 +215,43 @@ public class Conversation extends AbstractEntity implements Blockable {
 		}
 	}
 
-	public Message findSentMessageWithUuid(String uuid) {
+	public Message findSentMessageWithUuidOrRemoteId(String id) {
+		synchronized (this.messages) {
+			for (Message message : this.messages) {
+				if (id.equals(message.getUuid())
+						|| (message.getStatus() >= Message.STATUS_SEND
+						&& id.equals(message.getRemoteMsgId()))) {
+					return message;
+				}
+			}
+		}
+		return null;
+	}
+
+	public Message findMessageWithRemoteIdAndCounterpart(String id, Jid counterpart, boolean received, boolean carbon) {
+		synchronized (this.messages) {
+			for(int i = this.messages.size() - 1; i >= 0; --i) {
+				Message message = messages.get(i);
+				if (counterpart.equals(message.getCounterpart())
+						&& ((message.getStatus() == Message.STATUS_RECEIVED) == received)
+						&& (carbon == message.isCarbon() || received) ) {
+					if (id.equals(message.getRemoteMsgId())) {
+						return message;
+					} else {
+						return null;
+					}
+				}
+			}
+		}
+		return null;
+	}
+
+	public Message findSentMessageWithUuid(String id) {
 		synchronized (this.messages) {
 			for (Message message : this.messages) {
-				if (uuid.equals(message.getUuid())
-						|| (message.getStatus() >= Message.STATUS_SEND && uuid
-							.equals(message.getRemoteMsgId()))) {
+				if (id.equals(message.getUuid())) {
 					return message;
-							}
+				}
 			}
 		}
 		return null;
@@ -256,9 +298,24 @@ public class Conversation extends AbstractEntity implements Blockable {
 		}
 	}
 
+	public void setFirstMamReference(String reference) {
+		this.mFirstMamReference = reference;
+	}
+
+	public String getFirstMamReference() {
+		return this.mFirstMamReference;
+	}
+
+	public void setCorrectingMessage(Message correctingMessage) {
+		this.correctingMessage = correctingMessage;
+	}
+
+	public Message getCorrectingMessage() {
+		return this.correctingMessage;
+	}
 
 	public interface OnMessageFound {
-		public void onMessageFound(final Message message);
+		void onMessageFound(final Message message);
 	}
 
 	public Conversation(final String name, final Account account, final Jid contactJid,
@@ -291,13 +348,17 @@ public class Conversation extends AbstractEntity implements Blockable {
 		return (this.messages.size() == 0) || this.messages.get(this.messages.size() - 1).isRead();
 	}
 
-	public void markRead() {
-		for (int i = this.messages.size() - 1; i >= 0; --i) {
-			if (messages.get(i).isRead()) {
-				break;
+	public List<Message> markRead() {
+		final List<Message> unread = new ArrayList<>();
+		synchronized (this.messages) {
+			for(Message message : this.messages) {
+				if (!message.isRead()) {
+					message.markRead();
+					unread.add(message);
+				}
 			}
-			this.messages.get(i).markRead();
 		}
+		return unread;
 	}
 
 	public Message getLatestMarkableMessage() {
@@ -330,8 +391,8 @@ public class Conversation extends AbstractEntity implements Blockable {
 		if (getMode() == MODE_MULTI) {
 			if (getMucOptions().getSubject() != null) {
 				return getMucOptions().getSubject();
-			} else if (bookmark != null && bookmark.getName() != null) {
-				return bookmark.getName();
+			} else if (bookmark != null && bookmark.getBookmarkName() != null) {
+				return bookmark.getBookmarkName();
 			} else {
 				String generatedName = getMucOptions().createNameFromParticipants();
 				if (generatedName != null) {
@@ -456,15 +517,18 @@ public class Conversation extends AbstractEntity implements Blockable {
 		return mSmp;
 	}
 
-	public void startOtrIfNeeded() {
-		if (this.otrSession != null
-				&& this.otrSession.getSessionStatus() != SessionStatus.ENCRYPTED) {
+	public boolean startOtrIfNeeded() {
+		if (this.otrSession != null && this.otrSession.getSessionStatus() != SessionStatus.ENCRYPTED) {
 			try {
 				this.otrSession.startSession();
+				return true;
 			} catch (OtrException e) {
 				this.resetOtrSession();
+				return false;
 			}
-				}
+		} else {
+			return true;
+		}
 	}
 
 	public boolean endOtrIfNeeded() {
@@ -520,6 +584,13 @@ public class Conversation extends AbstractEntity implements Blockable {
 		return getContact().getOtrFingerprints().contains(getOtrFingerprint());
 	}
 
+	/**
+	 * short for is Private and Non-anonymous
+	 */
+	private boolean isPnNA() {
+		return mode == MODE_SINGLE || (getMucOptions().membersOnly() && getMucOptions().nonanonymous());
+	}
+
 	public synchronized MucOptions getMucOptions() {
 		if (this.mucOptions == null) {
 			this.mucOptions = new MucOptions(this);
@@ -543,42 +614,70 @@ public class Conversation extends AbstractEntity implements Blockable {
 		return this.nextCounterpart;
 	}
 
-	public int getLatestEncryption() {
-		int latestEncryption = this.getLatestMessage().getEncryption();
-		if ((latestEncryption == Message.ENCRYPTION_DECRYPTED)
-				|| (latestEncryption == Message.ENCRYPTION_DECRYPTION_FAILED)) {
-			return Message.ENCRYPTION_PGP;
-		} else {
-			return latestEncryption;
+	private int getMostRecentlyUsedOutgoingEncryption() {
+		synchronized (this.messages) {
+			for(int i = this.messages.size() -1; i >= 0; --i) {
+				final Message m = this.messages.get(i);
+				if (!m.isCarbon() && m.getStatus() != Message.STATUS_RECEIVED) {
+					final int e = m.getEncryption();
+					if (e == Message.ENCRYPTION_DECRYPTED || e == Message.ENCRYPTION_DECRYPTION_FAILED) {
+						return Message.ENCRYPTION_PGP;
+					} else {
+						return e;
+					}
+				}
+			}
 		}
+		return Message.ENCRYPTION_NONE;
 	}
 
-	public int getNextEncryption(boolean force) {
-		int next = this.getIntAttribute(ATTRIBUTE_NEXT_ENCRYPTION, -1);
-		if (next == -1) {
-			int latest = this.getLatestEncryption();
-			if (latest == Message.ENCRYPTION_NONE) {
-				if (force && getMode() == MODE_SINGLE) {
-					return Message.ENCRYPTION_OTR;
-				} else if (getContact().getPresences().size() == 1) {
-					if (getContact().getOtrFingerprints().size() >= 1) {
-						return Message.ENCRYPTION_OTR;
+	private int getMostRecentlyUsedIncomingEncryption() {
+		synchronized (this.messages) {
+			for(int i = this.messages.size() -1; i >= 0; --i) {
+				final Message m = this.messages.get(i);
+				if (m.getStatus() == Message.STATUS_RECEIVED) {
+					final int e = m.getEncryption();
+					if (e == Message.ENCRYPTION_DECRYPTED || e == Message.ENCRYPTION_DECRYPTION_FAILED) {
+						return Message.ENCRYPTION_PGP;
 					} else {
-						return latest;
+						return e;
 					}
+				}
+			}
+		}
+		return Message.ENCRYPTION_NONE;
+	}
+
+	public int getNextEncryption() {
+		final AxolotlService axolotlService = getAccount().getAxolotlService();
+		int next = this.getIntAttribute(ATTRIBUTE_NEXT_ENCRYPTION, -1);
+		if (next == -1) {
+			if (Config.X509_VERIFICATION && mode == MODE_SINGLE) {
+				if (axolotlService != null && axolotlService.isContactAxolotlCapable(getContact())) {
+					return Message.ENCRYPTION_AXOLOTL;
 				} else {
-					return latest;
+					return Message.ENCRYPTION_NONE;
 				}
+			}
+			int outgoing = this.getMostRecentlyUsedOutgoingEncryption();
+			if (outgoing == Message.ENCRYPTION_NONE) {
+				next = this.getMostRecentlyUsedIncomingEncryption();
 			} else {
-				return latest;
+				next = outgoing;
 			}
 		}
-		if (next == Message.ENCRYPTION_NONE && force
-				&& getMode() == MODE_SINGLE) {
-			return Message.ENCRYPTION_OTR;
-		} else {
-			return next;
+		if (!Config.supportUnencrypted()
+				&& (mode == MODE_SINGLE || Config.supportOpenPgpOnly())
+				&& next <= 0) {
+			if (Config.supportOmemo() && (axolotlService != null && axolotlService.isContactAxolotlCapable(getContact()) || !Config.multipleEncryptionChoices())) {
+				return Message.ENCRYPTION_AXOLOTL;
+			} else if (Config.supportOtr()) {
+				return Message.ENCRYPTION_OTR;
+			} else if (Config.supportOpenPgp()) {
+				return Message.ENCRYPTION_PGP;
+			}
 		}
+		return next;
 	}
 
 	public void setNextEncryption(int encryption) {
@@ -639,37 +738,32 @@ public class Conversation extends AbstractEntity implements Blockable {
 		synchronized (this.messages) {
 			for (int i = this.messages.size() - 1; i >= 0; --i) {
 				Message message = this.messages.get(i);
-				if ((message.getStatus() == Message.STATUS_UNSEND || message.getStatus() == Message.STATUS_SEND) && message.getBody() != null && message.getBody().equals(body)) {
-					return message;
+				if (message.getStatus() == Message.STATUS_UNSEND || message.getStatus() == Message.STATUS_SEND) {
+					String otherBody;
+					if (message.hasFileOnRemoteHost()) {
+						otherBody = message.getFileParams().url.toString();
+					} else {
+						otherBody = message.body;
+					}
+					if (otherBody != null && otherBody.equals(body)) {
+						return message;
+					}
 				}
 			}
 			return null;
 		}
 	}
 
-	public boolean setLastMessageTransmitted(long value) {
-		long before = getLastMessageTransmitted();
-		if (value - before > 1000) {
-			this.setAttribute(ATTRIBUTE_LAST_MESSAGE_TRANSMITTED, String.valueOf(value));
-			return true;
-		} else {
-			return false;
-		}
-	}
-
 	public long getLastMessageTransmitted() {
-		long timestamp = getLongAttribute(ATTRIBUTE_LAST_MESSAGE_TRANSMITTED,0);
-		if (timestamp == 0) {
-			synchronized (this.messages) {
-				for(int i = this.messages.size() - 1; i >= 0; --i) {
-					Message message = this.messages.get(i);
-					if (message.getStatus() == Message.STATUS_RECEIVED) {
-						return message.getTimeSent();
-					}
+		synchronized (this.messages) {
+			for(int i = this.messages.size() - 1; i >= 0; --i) {
+				Message message = this.messages.get(i);
+				if (message.getStatus() == Message.STATUS_RECEIVED || message.isCarbon()) {
+					return message.getTimeSent();
 				}
 			}
 		}
-		return timestamp;
+		return 0;
 	}
 
 	public void setMutedTill(long value) {
@@ -680,6 +774,10 @@ public class Conversation extends AbstractEntity implements Blockable {
 		return System.currentTimeMillis() < this.getLongAttribute(ATTRIBUTE_MUTED_TILL, 0);
 	}
 
+	public boolean alwaysNotify() {
+		return mode == MODE_SINGLE || getBooleanAttribute(ATTRIBUTE_ALWAYS_NOTIFY, Config.ALWAYS_NOTIFY_BY_DEFAULT || isPnNA());
+	}
+
 	public boolean setAttribute(String key, String value) {
 		try {
 			this.attributes.put(key, value);
@@ -723,6 +821,15 @@ public class Conversation extends AbstractEntity implements Blockable {
 		}
 	}
 
+	public boolean getBooleanAttribute(String key, boolean defaultValue) {
+		String value = this.getAttribute(key);
+		if (value == null) {
+			return defaultValue;
+		} else {
+			return Boolean.parseBoolean(value);
+		}
+	}
+
 	public void add(Message message) {
 		message.setConversation(this);
 		synchronized (this.messages) {
@@ -730,10 +837,18 @@ public class Conversation extends AbstractEntity implements Blockable {
 		}
 	}
 
+	public void prepend(Message message) {
+		message.setConversation(this);
+		synchronized (this.messages) {
+			this.messages.add(0,message);
+		}
+	}
+
 	public void addAll(int index, List<Message> messages) {
 		synchronized (this.messages) {
 			this.messages.addAll(index, messages);
 		}
+		account.getPgpDecryptionService().addAll(messages);
 	}
 
 	public void sort() {
@@ -757,6 +872,9 @@ public class Conversation extends AbstractEntity implements Blockable {
 	}
 
 	public int unreadCount() {
+		if (getLongAttribute(Conversation.ATTRIBUTE_MUTED_TILL,0) == Long.MAX_VALUE) {
+			return 0;
+		}
 		synchronized (this.messages) {
 			int count = 0;
 			for(int i = this.messages.size() - 1; i >= 0; --i) {
@@ -764,10 +882,7 @@ public class Conversation extends AbstractEntity implements Blockable {
 				if (message.isRead()) {
 					return count;
 				}
-				if (getMode() == Conversation.MODE_SINGLE
-						|| ConversationsPlusPreferences.alwaysNotifyInConference()
-						|| account.getXmppConnectionService().getNotificationService().wasHighlightedOrPrivate(message)
-						) {
+				if (alwaysNotify() || MessageUtil.wasHighlightedOrPrivate(message)) {
 					++count;
 				}
 			}
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/DownloadableFile.java b/src/main/java/de/thedevstack/conversationsplus/entities/DownloadableFile.java
index 4031e546..424d0301 100644
--- a/src/main/java/de/thedevstack/conversationsplus/entities/DownloadableFile.java
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/DownloadableFile.java
@@ -1,26 +1,7 @@
 package de.thedevstack.conversationsplus.entities;
 
 import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileNotFoundException;
-import java.io.FileOutputStream;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.net.URLConnection;
-import java.security.InvalidAlgorithmParameterException;
-import java.security.InvalidKeyException;
-import java.security.Key;
-import java.security.NoSuchAlgorithmException;
-
-import javax.crypto.Cipher;
-import javax.crypto.CipherInputStream;
-import javax.crypto.CipherOutputStream;
-import javax.crypto.NoSuchPaddingException;
-import javax.crypto.spec.IvParameterSpec;
-import javax.crypto.spec.SecretKeySpec;
-
-import de.thedevstack.android.logcat.Logging;
-import de.thedevstack.conversationsplus.Config;
+
 import de.thedevstack.conversationsplus.utils.MimeUtils;
 
 public class DownloadableFile extends File {
@@ -29,8 +10,7 @@ public class DownloadableFile extends File {
 
 	private long expectedSize = 0;
 	private String sha1sum;
-	private Key aeskey;
-	private String mime;
+	private byte[] aeskey;
 
 	private byte[] iv = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
 			0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0xf };
@@ -44,15 +24,7 @@ public class DownloadableFile extends File {
 	}
 
 	public long getExpectedSize() {
-		if (this.aeskey != null) {
-			if (this.expectedSize == 0) {
-				return 0;
-			} else {
-				return (this.expectedSize / 16 + 1) * 16;
-			}
-		} else {
-			return this.expectedSize;
-		}
+		return this.expectedSize;
 	}
 
 	public String getMimeType() {
@@ -78,91 +50,38 @@ public class DownloadableFile extends File {
 		this.sha1sum = sum;
 	}
 
-	public void setKey(byte[] key) {
-		if (key.length == 48) {
+	public void setKeyAndIv(byte[] keyIvCombo) {
+		if (keyIvCombo.length == 48) {
 			byte[] secretKey = new byte[32];
 			byte[] iv = new byte[16];
-			System.arraycopy(key, 0, iv, 0, 16);
-			System.arraycopy(key, 16, secretKey, 0, 32);
-			this.aeskey = new SecretKeySpec(secretKey, "AES");
+			System.arraycopy(keyIvCombo, 0, iv, 0, 16);
+			System.arraycopy(keyIvCombo, 16, secretKey, 0, 32);
+			this.aeskey = secretKey;
 			this.iv = iv;
-		} else if (key.length >= 32) {
+		} else if (keyIvCombo.length >= 32) {
 			byte[] secretKey = new byte[32];
-			System.arraycopy(key, 0, secretKey, 0, 32);
-			this.aeskey = new SecretKeySpec(secretKey, "AES");
-		} else if (key.length >= 16) {
+			System.arraycopy(keyIvCombo, 0, secretKey, 0, 32);
+			this.aeskey = secretKey;
+		} else if (keyIvCombo.length >= 16) {
 			byte[] secretKey = new byte[16];
-			System.arraycopy(key, 0, secretKey, 0, 16);
-			this.aeskey = new SecretKeySpec(secretKey, "AES");
+			System.arraycopy(keyIvCombo, 0, secretKey, 0, 16);
+			this.aeskey = secretKey;
 		}
 	}
 
-	public Key getKey() {
-		return this.aeskey;
+	public void setKey(byte[] key) {
+		this.aeskey = key;
 	}
 
-	public InputStream createInputStream() {
-		if (this.getKey() == null) {
-			try {
-				return new FileInputStream(this);
-			} catch (FileNotFoundException e) {
-				return null;
-			}
-		} else {
-			try {
-				IvParameterSpec ips = new IvParameterSpec(iv);
-				Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
-				cipher.init(Cipher.ENCRYPT_MODE, this.getKey(), ips);
-				Logging.d(Config.LOGTAG, "opening encrypted input stream");
-				return new CipherInputStream(new FileInputStream(this), cipher);
-			} catch (NoSuchAlgorithmException e) {
-				Logging.d(Config.LOGTAG, "no such algo: " + e.getMessage());
-				return null;
-			} catch (NoSuchPaddingException e) {
-				Logging.d(Config.LOGTAG, "no such padding: " + e.getMessage());
-				return null;
-			} catch (InvalidKeyException e) {
-				Logging.d(Config.LOGTAG, "invalid key: " + e.getMessage());
-				return null;
-			} catch (InvalidAlgorithmParameterException e) {
-				Logging.d(Config.LOGTAG, "invavid iv:" + e.getMessage());
-				return null;
-			} catch (FileNotFoundException e) {
-				return null;
-			}
-		}
+	public void setIv(byte[] iv) {
+		this.iv = iv;
 	}
 
-	public OutputStream createOutputStream() {
-		if (this.getKey() == null) {
-			try {
-				return new FileOutputStream(this);
-			} catch (FileNotFoundException e) {
-				return null;
-			}
-		} else {
-			try {
-				IvParameterSpec ips = new IvParameterSpec(this.iv);
-				Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
-				cipher.init(Cipher.DECRYPT_MODE, this.getKey(), ips);
-				Logging.d(Config.LOGTAG, "opening encrypted output stream");
-				return new CipherOutputStream(new FileOutputStream(this),
-						cipher);
-			} catch (NoSuchAlgorithmException e) {
-				Logging.d(Config.LOGTAG, "no such algo: " + e.getMessage());
-				return null;
-			} catch (NoSuchPaddingException e) {
-				Logging.d(Config.LOGTAG, "no such padding: " + e.getMessage());
-				return null;
-			} catch (InvalidKeyException e) {
-				Logging.d(Config.LOGTAG, "invalid key: " + e.getMessage());
-				return null;
-			} catch (InvalidAlgorithmParameterException e) {
-				Logging.d(Config.LOGTAG, "invavid iv:" + e.getMessage());
-				return null;
-			} catch (FileNotFoundException e) {
-				return null;
-			}
-		}
+	public byte[] getKey() {
+		return this.aeskey;
+	}
+
+	public byte[] getIv() {
+		return this.iv;
 	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/ListItem.java b/src/main/java/de/thedevstack/conversationsplus/entities/ListItem.java
index 9daf90d1..24dc7e94 100644
--- a/src/main/java/de/thedevstack/conversationsplus/entities/ListItem.java
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/ListItem.java
@@ -5,15 +5,17 @@ import java.util.List;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 
 public interface ListItem extends Comparable<ListItem> {
-	public String getDisplayName();
+	String getDisplayName();
 
-	public Jid getJid();
+	String getDisplayJid();
 
-	public List<Tag> getTags();
+	Jid getJid();
 
 	public int getStatusColor();
 
-	public final class Tag {
+	List<Tag> getTags();
+
+	final class Tag {
 		private final String name;
 		private final int color;
 
@@ -31,5 +33,5 @@ public interface ListItem extends Comparable<ListItem> {
 		}
 	}
 
-	public boolean match(final String needle);
+	boolean match(final String needle);
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/Message.java b/src/main/java/de/thedevstack/conversationsplus/entities/Message.java
index a5d06f46..d03cab92 100644
--- a/src/main/java/de/thedevstack/conversationsplus/entities/Message.java
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/Message.java
@@ -8,9 +8,9 @@ import java.net.URL;
 import java.util.Arrays;
 
 import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.crypto.axolotl.XmppAxolotlSession;
 import de.thedevstack.conversationsplus.utils.GeoHelper;
 import de.thedevstack.conversationsplus.utils.MimeUtils;
-import de.thedevstack.conversationsplus.utils.UIHelper;
 import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 
@@ -34,6 +34,7 @@ public class Message extends AbstractEntity {
 	public static final int ENCRYPTION_OTR = 2;
 	public static final int ENCRYPTION_DECRYPTED = 3;
 	public static final int ENCRYPTION_DECRYPTION_FAILED = 4;
+	public static final int ENCRYPTION_AXOLOTL = 5;
 
 	public static final int TYPE_TEXT = 0;
 	public static final int TYPE_IMAGE = 1;
@@ -49,9 +50,13 @@ public class Message extends AbstractEntity {
 	public static final String ENCRYPTION = "encryption";
 	public static final String STATUS = "status";
 	public static final String TYPE = "type";
+	public static final String CARBON = "carbon";
+	public static final String EDITED = "edited";
 	public static final String REMOTE_MSG_ID = "remoteMsgId";
 	public static final String SERVER_MSG_ID = "serverMsgId";
 	public static final String RELATIVE_FILE_PATH = "relativeFilePath";
+	public static final String FINGERPRINT = "axolotl_fingerprint";
+	public static final String READ = "read";
 	public static final String ME_COMMAND = "/me ";
 
 
@@ -59,12 +64,14 @@ public class Message extends AbstractEntity {
 	protected String conversationUuid;
 	protected Jid counterpart;
 	protected Jid trueCounterpart;
-	private String body;
+	protected String body;
 	protected String encryptedBody;
 	protected long timeSent;
 	protected int encryption;
 	protected int status;
 	protected int type;
+	protected boolean carbon = false;
+	protected String edited = null;
 	protected String relativeFilePath;
 	protected boolean read = true;
 	protected String remoteMsgId = null;
@@ -73,6 +80,7 @@ public class Message extends AbstractEntity {
 	protected Transferable transferable = null;
 	private Message mNextMessage = null;
 	private Message mPreviousMessage = null;
+	private String axolotlFingerprint = null;
 
 	private Message() {
 
@@ -92,16 +100,22 @@ public class Message extends AbstractEntity {
 				encryption,
 				status,
 				TYPE_TEXT,
+				false,
 				null,
 				null,
+				null,
+				null,
+				true,
 				null);
 		this.conversation = conversation;
 	}
 
 	private Message(final String uuid, final String conversationUUid, final Jid counterpart,
 					final Jid trueCounterpart, final String body, final long timeSent,
-					final int encryption, final int status, final int type, final String remoteMsgId,
-					final String relativeFilePath, final String serverMsgId) {
+					final int encryption, final int status, final int type, final boolean carbon,
+					final String remoteMsgId, final String relativeFilePath,
+					final String serverMsgId, final String fingerprint, final boolean read,
+					final String edited) {
 		this.uuid = uuid;
 		this.conversationUuid = conversationUUid;
 		this.counterpart = counterpart;
@@ -111,9 +125,13 @@ public class Message extends AbstractEntity {
 		this.encryption = encryption;
 		this.status = status;
 		this.type = type;
+		this.carbon = carbon;
 		this.remoteMsgId = remoteMsgId;
 		this.relativeFilePath = relativeFilePath;
 		this.serverMsgId = serverMsgId;
+		this.axolotlFingerprint = fingerprint;
+		this.read = read;
+		this.edited = edited;
 	}
 
 	public static Message fromCursor(Cursor cursor) {
@@ -148,13 +166,17 @@ public class Message extends AbstractEntity {
 				cursor.getInt(cursor.getColumnIndex(ENCRYPTION)),
 				cursor.getInt(cursor.getColumnIndex(STATUS)),
 				cursor.getInt(cursor.getColumnIndex(TYPE)),
+				cursor.getInt(cursor.getColumnIndex(CARBON)) > 0,
 				cursor.getString(cursor.getColumnIndex(REMOTE_MSG_ID)),
 				cursor.getString(cursor.getColumnIndex(RELATIVE_FILE_PATH)),
-				cursor.getString(cursor.getColumnIndex(SERVER_MSG_ID)));
+				cursor.getString(cursor.getColumnIndex(SERVER_MSG_ID)),
+				cursor.getString(cursor.getColumnIndex(FINGERPRINT)),
+				cursor.getInt(cursor.getColumnIndex(READ)) > 0,
+				cursor.getString(cursor.getColumnIndex(EDITED)));
 	}
 
 	public static Message createStatusMessage(Conversation conversation, String body) {
-		Message message = new Message();
+		final Message message = new Message();
 		message.setType(Message.TYPE_STATUS);
 		message.setConversation(conversation);
 		message.setBody(body);
@@ -181,9 +203,13 @@ public class Message extends AbstractEntity {
 		values.put(ENCRYPTION, encryption);
 		values.put(STATUS, status);
 		values.put(TYPE, type);
+		values.put(CARBON, carbon ? 1 : 0);
 		values.put(REMOTE_MSG_ID, remoteMsgId);
 		values.put(RELATIVE_FILE_PATH, relativeFilePath);
 		values.put(SERVER_MSG_ID, serverMsgId);
+		values.put(FINGERPRINT, axolotlFingerprint);
+		values.put(READ,read ? 1 : 0);
+		values.put(EDITED, edited);
 		return values;
 	}
 
@@ -304,10 +330,30 @@ public class Message extends AbstractEntity {
 		this.type = type;
 	}
 
+	public boolean isCarbon() {
+		return carbon;
+	}
+
+	public void setCarbon(boolean carbon) {
+		this.carbon = carbon;
+	}
+
+	public void setEdited(String edited) {
+		this.edited = edited;
+	}
+
+	public boolean edited() {
+		return this.edited != null;
+	}
+
 	public void setTrueCounterpart(Jid trueCounterpart) {
 		this.trueCounterpart = trueCounterpart;
 	}
 
+	public Jid getTrueCounterpart() {
+		return this.trueCounterpart;
+	}
+
 	public Transferable getTransferable() {
 		return this.transferable;
 	}
@@ -333,7 +379,9 @@ public class Message extends AbstractEntity {
 			if (message.getRemoteMsgId() != null) {
 				return (message.getRemoteMsgId().equals(this.remoteMsgId) || message.getRemoteMsgId().equals(this.uuid))
 						&& this.counterpart.equals(message.getCounterpart())
-						&& body.equals(otherBody);
+						&& (body.equals(otherBody)
+						||(message.getEncryption() == Message.ENCRYPTION_PGP
+						&&  message.getRemoteMsgId().matches("[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}"))) ;
 			} else {
 				return this.remoteMsgId == null
 						&& this.counterpart.equals(message.getCounterpart())
@@ -371,25 +419,43 @@ public class Message extends AbstractEntity {
 		}
 	}
 
+	public boolean isLastCorrectableMessage() {
+		Message next = next();
+		while(next != null) {
+			if (next.isCorrectable()) {
+				return false;
+			}
+			next = next.next();
+		}
+		return isCorrectable();
+	}
+
+	private boolean isCorrectable() {
+		return getStatus() != STATUS_RECEIVED && !isCarbon();
+	}
+
 	public boolean mergeable(final Message message) {
 		return message != null &&
 				(message.getType() == Message.TYPE_TEXT &&
 						this.getTransferable() == null &&
 						message.getTransferable() == null &&
 						message.getEncryption() != Message.ENCRYPTION_PGP &&
+						message.getEncryption() != Message.ENCRYPTION_DECRYPTION_FAILED &&
 						this.getType() == message.getType() &&
 						//this.getStatus() == message.getStatus() &&
 						isStatusMergeable(this.getStatus(), message.getStatus()) &&
 						this.getEncryption() == message.getEncryption() &&
 						this.getCounterpart() != null &&
 						this.getCounterpart().equals(message.getCounterpart()) &&
+						this.edited() == message.edited() &&
 						(message.getTimeSent() - this.getTimeSent()) <= (Config.MESSAGE_MERGE_WINDOW * 1000) &&
 						!GeoHelper.isGeoUri(message.getBody()) &&
 						!GeoHelper.isGeoUri(this.getBody()) &&
 						message.treatAsDownloadable() == Decision.NEVER &&
 						this.treatAsDownloadable() == Decision.NEVER &&
 						!message.getBody().startsWith(ME_COMMAND) &&
-						!this.getBody().startsWith(ME_COMMAND)
+						!this.getBody().startsWith(ME_COMMAND) &&
+						this.isTrusted() == message.isTrusted()
 				);
 	}
 
@@ -405,11 +471,14 @@ public class Message extends AbstractEntity {
 	}
 
 	public String getMergedBody() {
-		final Message next = this.next();
-		if (this.mergeable(next)) {
-			return getBody() + MERGE_SEPARATOR + next.getMergedBody();
+		StringBuilder body = new StringBuilder(this.body);
+		Message current = this;
+		while(current.mergeable(current.next())) {
+			current = current.next();
+			body.append(MERGE_SEPARATOR);
+			body.append(current.getBody());
 		}
-		return getBody();
+		return body.toString();
 	}
 
 	public boolean hasMeCommand() {
@@ -417,20 +486,23 @@ public class Message extends AbstractEntity {
 	}
 
 	public int getMergedStatus() {
-		final Message next = this.next();
-		if (this.mergeable(next)) {
-			return next.getStatus();
+		int status = this.status;
+		Message current = this;
+		while(current.mergeable(current.next())) {
+			current = current.next();
+			status = current.status;
 		}
-		return getStatus();
+		return status;
 	}
 
 	public long getMergedTimeSent() {
-		Message next = this.next();
-		if (this.mergeable(next)) {
-			return next.getMergedTimeSent();
-		} else {
-			return getTimeSent();
+		long time = this.timeSent;
+		Message current = this;
+		while(current.mergeable(current.next())) {
+			current = current.next();
+			time = current.timeSent;
 		}
+		return time;
 	}
 
 	public boolean wasMergedIntoPrevious() {
@@ -463,6 +535,14 @@ public class Message extends AbstractEntity {
 		}
 	}
 
+	public void setUuid(String uuid) {
+		this.uuid = uuid;
+	}
+
+	public String getEditedId() {
+		return edited;
+	}
+
 	public enum Decision {
 		MUST,
 		SHOULD,
@@ -478,18 +558,15 @@ public class Message extends AbstractEntity {
 		if (path == null || path.isEmpty()) {
 			return null;
 		}
-
+		
 		String filename = path.substring(path.lastIndexOf('/') + 1).toLowerCase();
-
 		int dotPosition = filename.lastIndexOf(".");
 
-		if (dotPosition != -1)
-		{
+		if (dotPosition != -1) {
 			String extension = filename.substring(dotPosition + 1);
-
 			// we want the real file extension, not the crypto one
 			if (Arrays.asList(Transferable.VALID_CRYPTO_EXTENSIONS).contains(extension)) {
-				return extractRelevantExtension(path.substring(0,dotPosition));
+				return extractRelevantExtension(filename.substring(0,dotPosition));
 			} else {
 				return extension;
 			}
@@ -673,4 +750,55 @@ public class Message extends AbstractEntity {
 		public int width = 0;
 		public int height = 0;
 	}
+
+	public void setAxolotlFingerprint(String fingerprint) {
+		this.axolotlFingerprint = fingerprint;
+	}
+
+	public String getAxolotlFingerprint() {
+		return axolotlFingerprint;
+	}
+
+	public boolean isTrusted() {
+		XmppAxolotlSession.Trust t = conversation.getAccount().getAxolotlService().getFingerprintTrust(axolotlFingerprint);
+		return t != null && t.trusted();
+	}
+
+	private  int getPreviousEncryption() {
+		for (Message iterator = this.prev(); iterator != null; iterator = iterator.prev()){
+			if( iterator.isCarbon() || iterator.getStatus() == STATUS_RECEIVED ) {
+				continue;
+			}
+			return iterator.getEncryption();
+		}
+		return ENCRYPTION_NONE;
+	}
+
+	private int getNextEncryption() {
+		for (Message iterator = this.next(); iterator != null; iterator = iterator.next()){
+			if( iterator.isCarbon() || iterator.getStatus() == STATUS_RECEIVED ) {
+				continue;
+			}
+			return iterator.getEncryption();
+		}
+		return conversation.getNextEncryption();
+	}
+
+	public boolean isValidInSession() {
+		int pastEncryption = getCleanedEncryption(this.getPreviousEncryption());
+		int futureEncryption = getCleanedEncryption(this.getNextEncryption());
+
+		boolean inUnencryptedSession = pastEncryption == ENCRYPTION_NONE
+				|| futureEncryption == ENCRYPTION_NONE
+				|| pastEncryption != futureEncryption;
+
+		return inUnencryptedSession || getCleanedEncryption(this.getEncryption()) == pastEncryption;
+	}
+
+	private static int getCleanedEncryption(int encryption) {
+		if (encryption == ENCRYPTION_DECRYPTED || encryption == ENCRYPTION_DECRYPTION_FAILED) {
+			return ENCRYPTION_PGP;
+		}
+		return encryption;
+	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/MucOptions.java b/src/main/java/de/thedevstack/conversationsplus/entities/MucOptions.java
index 22155f3e..f0eb83de 100644
--- a/src/main/java/de/thedevstack/conversationsplus/entities/MucOptions.java
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/MucOptions.java
@@ -1,21 +1,31 @@
 package de.thedevstack.conversationsplus.entities;
 
+import android.annotation.SuppressLint;
+
 import java.util.ArrayList;
+import java.util.Collections;
+import java.util.LinkedHashMap;
 import java.util.List;
-import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.Map;
 
 import de.thedevstack.conversationsplus.R;
-import de.thedevstack.conversationsplus.crypto.PgpEngine;
-import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.forms.Data;
+import de.thedevstack.conversationsplus.xmpp.forms.Field;
 import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
-import de.thedevstack.conversationsplus.xmpp.stanzas.PresencePacket;
-
-import android.annotation.SuppressLint;
+import de.thedevstack.conversationsplus.xmpp.pep.Avatar;
 
 @SuppressLint("DefaultLocale")
 public class MucOptions {
 
+	public Account getAccount() {
+		return this.conversation.getAccount();
+	}
+
+	public void setSelf(User user) {
+		this.self = user;
+	}
+
 	public enum Affiliation {
 		OWNER("owner", 4, R.string.owner),
 		ADMIN("admin", 3, R.string.admin),
@@ -23,7 +33,7 @@ public class MucOptions {
 		OUTCAST("outcast", 0, R.string.outcast),
 		NONE("none", 1, R.string.no_affiliation);
 
-		private Affiliation(String string, int rank, int resId) {
+		Affiliation(String string, int rank, int resId) {
 			this.string = string;
 			this.resId = resId;
 			this.rank = rank;
@@ -52,18 +62,20 @@ public class MucOptions {
 	}
 
 	public enum Role {
-		MODERATOR("moderator", R.string.moderator),
-		VISITOR("visitor", R.string.visitor),
-		PARTICIPANT("participant", R.string.participant),
-		NONE("none", R.string.no_role);
+		MODERATOR("moderator", R.string.moderator,3),
+		VISITOR("visitor", R.string.visitor,1),
+		PARTICIPANT("participant", R.string.participant,2),
+		NONE("none", R.string.no_role,0);
 
-		private Role(String string, int resId) {
+		Role(String string, int resId, int rank) {
 			this.string = string;
 			this.resId = resId;
+			this.rank = rank;
 		}
 
 		private String string;
 		private int resId;
+		private int rank;
 
 		public int getResId() {
 			return resId;
@@ -73,51 +85,59 @@ public class MucOptions {
 		public String toString() {
 			return this.string;
 		}
-	}
 
-	public static final int ERROR_NO_ERROR = 0;
-	public static final int ERROR_NICK_IN_USE = 1;
-	public static final int ERROR_UNKNOWN = 2;
-	public static final int ERROR_PASSWORD_REQUIRED = 3;
-	public static final int ERROR_BANNED = 4;
-	public static final int ERROR_MEMBERS_ONLY = 5;
+		public boolean ranks(Role role) {
+			return rank >= role.rank;
+		}
+	}
 
-	public static final int KICKED_FROM_ROOM = 9;
+	public enum Error {
+		NO_RESPONSE,
+		NONE,
+		NICK_IN_USE,
+		PASSWORD_REQUIRED,
+		BANNED,
+		MEMBERS_ONLY,
+		KICKED,
+		SHUTDOWN,
+		UNKNOWN
+	}
 
 	public static final String STATUS_CODE_ROOM_CONFIG_CHANGED = "104";
 	public static final String STATUS_CODE_SELF_PRESENCE = "110";
 	public static final String STATUS_CODE_BANNED = "301";
 	public static final String STATUS_CODE_CHANGED_NICK = "303";
 	public static final String STATUS_CODE_KICKED = "307";
-	public static final String STATUS_CODE_LOST_MEMBERSHIP = "321";
+	public static final String STATUS_CODE_AFFILIATION_CHANGE = "321";
+	public static final String STATUS_CODE_LOST_MEMBERSHIP = "322";
+	public static final String STATUS_CODE_SHUTDOWN = "332";
 
 	private interface OnEventListener {
-		public void onSuccess();
+		void onSuccess();
 
-		public void onFailure();
+		void onFailure();
 	}
 
 	public interface OnRenameListener extends OnEventListener {
 
 	}
 
-	public interface OnJoinListener extends OnEventListener {
-
-	}
-
-	public class User {
+	public static class User {
 		private Role role = Role.NONE;
 		private Affiliation affiliation = Affiliation.NONE;
-		private String name;
 		private Jid jid;
+		private Jid fullJid;
 		private long pgpKeyId = 0;
+		private Avatar avatar;
+		private MucOptions options;
 
-		public String getName() {
-			return name;
+		public User(MucOptions options, Jid from) {
+			this.options = options;
+			this.fullJid = from;
 		}
 
-		public void setName(String user) {
-			this.name = user;
+		public String getName() {
+			return this.fullJid.getResourcepart();
 		}
 
 		public void setJid(Jid jid) {
@@ -158,7 +178,7 @@ public class MucOptions {
 				return false;
 			} else {
 				User o = (User) other;
-				return name != null && name.equals(o.name)
+				return getName() != null && getName().equals(o.getName())
 						&& jid != null && jid.equals(o.jid)
 						&& affiliation == o.affiliation
 						&& role == o.role;
@@ -198,26 +218,48 @@ public class MucOptions {
 		}
 
 		public Contact getContact() {
-			return account.getRoster().getContactFromRoster(getJid());
+			return getAccount().getRoster().getContactFromRoster(getJid());
+		}
+
+		public boolean setAvatar(Avatar avatar) {
+			if (this.avatar != null && this.avatar.equals(avatar)) {
+				return false;
+			} else {
+				this.avatar = avatar;
+				return true;
+			}
+		}
+
+		public String getAvatar() {
+			return avatar == null ? null : avatar.getFilename();
+		}
+
+		public Account getAccount() {
+			return options.getAccount();
+		}
+
+		public Jid getFullJid() {
+			return fullJid;
 		}
 	}
 
 	private Account account;
-	private List<User> users = new CopyOnWriteArrayList<>();
+	private final Map<String, User> users = Collections.synchronizedMap(new LinkedHashMap<String, User>());
 	private List<String> features = new ArrayList<>();
+	private Data form = new Data();
 	private Conversation conversation;
 	private boolean isOnline = false;
-	private int error = ERROR_UNKNOWN;
-	private OnRenameListener onRenameListener = null;
-	private OnJoinListener onJoinListener = null;
-	private User self = new User();
+	private Error error = Error.NONE;
+	public OnRenameListener onRenameListener = null;
+	private User self;
 	private String subject = null;
 	private String password = null;
-	private boolean mNickChangingInProgress = false;
+	public boolean mNickChangingInProgress = false;
 
 	public MucOptions(Conversation conversation) {
 		this.account = conversation.getAccount();
 		this.conversation = conversation;
+		this.self = new User(this,createJoinJid(getProposedNick()));
 	}
 
 	public void updateFeatures(ArrayList<String> features) {
@@ -225,18 +267,39 @@ public class MucOptions {
 		this.features.addAll(features);
 	}
 
+	public void updateFormData(Data form) {
+		this.form = form;
+	}
+
 	public boolean hasFeature(String feature) {
 		return this.features.contains(feature);
 	}
 
 	public boolean canInvite() {
-		 return !membersOnly() || self.getAffiliation().ranks(Affiliation.ADMIN);
+		Field field = this.form.getFieldByName("muc#roomconfig_allowinvites");
+		return !membersOnly() || self.getRole().ranks(Role.MODERATOR) || (field != null && "1".equals(field.getValue()));
+	}
+
+	public boolean canChangeSubject() {
+		Field field = this.form.getFieldByName("muc#roomconfig_changesubject");
+		return self.getRole().ranks(Role.MODERATOR) || (field != null && "1".equals(field.getValue()));
+	}
+
+	public boolean participating() {
+		return !online()
+				|| self.getRole().ranks(Role.PARTICIPANT)
+				|| hasFeature("muc_unmoderated");
 	}
 
 	public boolean membersOnly() {
 		return hasFeature("muc_membersonly");
 	}
 
+	public boolean mamSupport() {
+		// Update with "urn:xmpp:mam:1" once we support it
+		return hasFeature("urn:xmpp:mam:0");
+	}
+
 	public boolean nonanonymous() {
 		return hasFeature("muc_nonanonymous");
 	}
@@ -245,135 +308,55 @@ public class MucOptions {
 		return hasFeature("muc_persistent");
 	}
 
-	public void deleteUser(String name) {
-		for (int i = 0; i < users.size(); ++i) {
-			if (users.get(i).getName().equals(name)) {
-				users.remove(i);
-				return;
-			}
-		}
+	public boolean moderated() {
+		return hasFeature("muc_moderated");
+	}
+
+	public User deleteUser(String name) {
+		return this.users.remove(name);
 	}
 
 	public void addUser(User user) {
-		for (int i = 0; i < users.size(); ++i) {
-			if (users.get(i).getName().equals(user.getName())) {
-				users.set(i, user);
-				return;
-			}
-		}
-		users.add(user);
-	}
-
-	public void processPacket(PresencePacket packet, PgpEngine pgp) {
-		final Jid from = packet.getFrom();
-		if (!from.isBareJid()) {
-			final String name = from.getResourcepart();
-			final String type = packet.getAttribute("type");
-			final Element x = packet.findChild("x", "http://jabber.org/protocol/muc#user");
-			final List<String> codes = getStatusCodes(x);
-			if (type == null) {
-				User user = new User();
-				if (x != null) {
-					Element item = x.findChild("item");
-					if (item != null && name != null) {
-						user.setName(name);
-						user.setAffiliation(item.getAttribute("affiliation"));
-						user.setRole(item.getAttribute("role"));
-						user.setJid(item.getAttributeAsJid("jid"));
-						if (codes.contains(STATUS_CODE_SELF_PRESENCE) || packet.getFrom().equals(this.conversation.getJid())) {
-							this.isOnline = true;
-							this.error = ERROR_NO_ERROR;
-							self = user;
-							if (mNickChangingInProgress) {
-								onRenameListener.onSuccess();
-								mNickChangingInProgress = false;
-							} else if (this.onJoinListener != null) {
-								this.onJoinListener.onSuccess();
-								this.onJoinListener = null;
-							}
-						} else {
-							addUser(user);
-						}
-						if (pgp != null) {
-							Element signed = packet.findChild("x", "jabber:x:signed");
-							if (signed != null) {
-								Element status = packet.findChild("status");
-								String msg;
-								if (status != null) {
-									msg = status.getContent();
-								} else {
-									msg = "";
-								}
-								user.setPgpKeyId(pgp.fetchKeyId(account, msg,
-										signed.getContent()));
-							}
-						}
-					}
-				}
-			} else if (type.equals("unavailable")) {
-				if (codes.contains(STATUS_CODE_SELF_PRESENCE) ||
-						packet.getFrom().equals(this.conversation.getJid())) {
-					if (codes.contains(STATUS_CODE_CHANGED_NICK)) {
-						this.mNickChangingInProgress = true;
-					} else if (codes.contains(STATUS_CODE_KICKED)) {
-						setError(KICKED_FROM_ROOM);
-					} else if (codes.contains(STATUS_CODE_BANNED)) {
-						setError(ERROR_BANNED);
-					} else if (codes.contains(STATUS_CODE_LOST_MEMBERSHIP)) {
-						setError(ERROR_MEMBERS_ONLY);
-					} else {
-						setError(ERROR_UNKNOWN);
-					}
-				} else {
-					deleteUser(name);
-				}
-			} else if (type.equals("error")) {
-				Element error = packet.findChild("error");
-				if (error != null && error.hasChild("conflict")) {
-					if (isOnline) {
-						if (onRenameListener != null) {
-							onRenameListener.onFailure();
-						}
-					} else {
-						setError(ERROR_NICK_IN_USE);
-					}
-				} else if (error != null && error.hasChild("not-authorized")) {
-					setError(ERROR_PASSWORD_REQUIRED);
-				} else if (error != null && error.hasChild("forbidden")) {
-					setError(ERROR_BANNED);
-				} else if (error != null && error.hasChild("registration-required")) {
-					setError(ERROR_MEMBERS_ONLY);
-				}
-			}
-		}
+		this.users.put(user.getName(), user);
 	}
 
-	private void setError(int error) {
-		this.isOnline = false;
+	public User findUser(String name) {
+		return this.users.get(name);
+	}
+
+	public boolean isUserInRoom(String name) {
+		return findUser(name) != null;
+	}
+
+	public void setError(Error error) {
+		this.isOnline = isOnline && error == Error.NONE;
 		this.error = error;
-		if (onJoinListener != null) {
-			onJoinListener.onFailure();
-			onJoinListener = null;
-		}
 	}
 
-	private List<String> getStatusCodes(Element x) {
-		List<String> codes = new ArrayList<>();
-		if (x != null) {
-			for (Element child : x.getChildren()) {
-				if (child.getName().equals("status")) {
-					String code = child.getAttribute("code");
-					if (code != null) {
-						codes.add(code);
-					}
-				}
+	public void setOnline() {
+		this.isOnline = true;
+	}
+
+	public ArrayList<User> getUsers() {
+		return new ArrayList<>(users.values());
+	}
+
+	public List<User> getUsers(int max) {
+		ArrayList<User> users = new ArrayList<>();
+		int i = 1;
+		for(User user : this.users.values()) {
+			users.add(user);
+			if (i >= max) {
+				break;
+			} else {
+				++i;
 			}
 		}
-		return codes;
+		return users;
 	}
 
-	public List<User> getUsers() {
-		return this.users;
+	public int getUserCount() {
+		return this.users.size();
 	}
 
 	public String getProposedNick() {
@@ -400,7 +383,7 @@ public class MucOptions {
 		return this.isOnline;
 	}
 
-	public int getError() {
+	public Error getError() {
 		return this.error;
 	}
 
@@ -408,13 +391,9 @@ public class MucOptions {
 		this.onRenameListener = listener;
 	}
 
-	public void setOnJoinListener(OnJoinListener listener) {
-		this.onJoinListener = listener;
-	}
-
 	public void setOffline() {
 		this.users.clear();
-		this.error = 0;
+		this.error = Error.NO_RESPONSE;
 		this.isOnline = false;
 	}
 
@@ -432,8 +411,8 @@ public class MucOptions {
 
 	public String createNameFromParticipants() {
 		if (users.size() >= 2) {
-			List<String> names = new ArrayList<String>();
-			for (User user : users) {
+			List<String> names = new ArrayList<>();
+			for (User user : getUsers(5)) {
 				Contact contact = user.getContact();
 				if (contact != null && !contact.getDisplayName().isEmpty()) {
 					names.add(contact.getDisplayName().split("\\s+")[0]);
@@ -456,20 +435,21 @@ public class MucOptions {
 
 	public long[] getPgpKeyIds() {
 		List<Long> ids = new ArrayList<>();
-		for (User user : getUsers()) {
+		for (User user : this.users.values()) {
 			if (user.getPgpKeyId() != 0) {
 				ids.add(user.getPgpKeyId());
 			}
 		}
-		long[] primitivLongArray = new long[ids.size()];
+		ids.add(account.getPgpId());
+		long[] primitiveLongArray = new long[ids.size()];
 		for (int i = 0; i < ids.size(); ++i) {
-			primitivLongArray[i] = ids.get(i);
+			primitiveLongArray[i] = ids.get(i);
 		}
-		return primitivLongArray;
+		return primitiveLongArray;
 	}
 
 	public boolean pgpKeysInUse() {
-		for (User user : getUsers()) {
+		for (User user : this.users.values()) {
 			if (user.getPgpKeyId() != 0) {
 				return true;
 			}
@@ -478,7 +458,7 @@ public class MucOptions {
 	}
 
 	public boolean everybodyHasKeys() {
-		for (User user : getUsers()) {
+		for (User user : this.users.values()) {
 			if (user.getPgpKeyId() == 0) {
 				return false;
 			}
@@ -494,13 +474,9 @@ public class MucOptions {
 		}
 	}
 
-	public Jid getTrueCounterpart(String counterpart) {
-		for (User user : this.getUsers()) {
-			if (user.getName().equals(counterpart)) {
-				return user.getJid();
-			}
-		}
-		return null;
+	public Jid getTrueCounterpart(String name) {
+		User user = findUser(name);
+		return user == null ? null : user.getJid();
 	}
 
 	public String getPassword() {
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/Presence.java b/src/main/java/de/thedevstack/conversationsplus/entities/Presence.java
new file mode 100644
index 00000000..d4f2871d
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/Presence.java
@@ -0,0 +1,80 @@
+package de.thedevstack.conversationsplus.entities;
+
+import java.lang.Comparable;
+import java.util.Locale;
+
+import de.thedevstack.conversationsplus.xml.Element;
+
+public class Presence implements Comparable {
+
+	public enum Status {
+		CHAT, ONLINE, AWAY, XA, DND, OFFLINE;
+
+		public String toShowString() {
+			switch(this) {
+				case CHAT: return "chat";
+				case AWAY: return "away";
+				case XA:   return "xa";
+				case DND:  return "dnd";
+			}
+
+			return null;
+		}
+	}
+
+	protected final Status status;
+	protected ServiceDiscoveryResult disco;
+	protected final String ver;
+	protected final String hash;
+
+	private Presence(Status status, String ver, String hash) {
+		this.status = status;
+		this.ver = ver;
+		this.hash = hash;
+	}
+
+	public static Presence parse(String show, Element caps) {
+		final String hash = caps == null ? null : caps.getAttribute("hash");
+		final String ver = caps == null ? null : caps.getAttribute("ver");
+		if (show == null) {
+			return new Presence(Status.ONLINE, ver, hash);
+		} else {
+			switch (show.toLowerCase(Locale.US)) {
+				case "away":
+					return new Presence(Status.AWAY, ver, hash);
+				case "xa":
+					return new Presence(Status.XA, ver, hash);
+				case "dnd":
+					return new Presence(Status.DND, ver, hash);
+				case "chat":
+					return new Presence(Status.CHAT, ver, hash);
+				default:
+					return new Presence(Status.ONLINE, ver, hash);
+			}
+		}
+	}
+
+	public int compareTo(Object other) {
+		return this.status.compareTo(((Presence)other).status);
+	}
+
+	public Status getStatus() {
+		return this.status;
+	}
+
+	public boolean hasCaps() {
+		return ver != null && hash != null;
+	}
+
+	public String getVer() {
+		return this.ver;
+	}
+
+	public String getHash() {
+		return this.hash;
+	}
+
+	public void setServiceDiscoveryResult(ServiceDiscoveryResult disco) {
+		this.disco = disco;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/Presences.java b/src/main/java/de/thedevstack/conversationsplus/entities/Presences.java
index cb984648..d32e931c 100644
--- a/src/main/java/de/thedevstack/conversationsplus/entities/Presences.java
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/Presences.java
@@ -1,29 +1,18 @@
 package de.thedevstack.conversationsplus.entities;
 
+import java.util.Collections;
 import java.util.Hashtable;
-import java.util.Iterator;
-import java.util.Map.Entry;
-
-import de.thedevstack.conversationsplus.xml.Element;
 
 public class Presences {
+	private final Hashtable<String, Presence> presences = new Hashtable<>();
 
-	public static final int CHAT = -1;
-	public static final int ONLINE = 0;
-	public static final int AWAY = 1;
-	public static final int XA = 2;
-	public static final int DND = 3;
-	public static final int OFFLINE = 4;
-
-	private Hashtable<String, Integer> presences = new Hashtable<String, Integer>();
-
-	public Hashtable<String, Integer> getPresences() {
+	public Hashtable<String, Presence> getPresences() {
 		return this.presences;
 	}
 
-	public void updatePresence(String resource, int status) {
+	public void updatePresence(String resource, Presence presence) {
 		synchronized (this.presences) {
-			this.presences.put(resource, status);
+			this.presences.put(resource, presence);
 		}
 	}
 
@@ -39,32 +28,10 @@ public class Presences {
 		}
 	}
 
-	public int getMostAvailableStatus() {
-		int status = OFFLINE;
+	public Presence getMostAvailablePresence() {
 		synchronized (this.presences) {
-			Iterator<Entry<String, Integer>> it = presences.entrySet().iterator();
-			while (it.hasNext()) {
-				Entry<String, Integer> entry = it.next();
-				if (entry.getValue() < status)
-					status = entry.getValue();
-			}
-		}
-		return status;
-	}
-
-	public static int parseShow(Element show) {
-		if ((show == null) || (show.getContent() == null)) {
-			return Presences.ONLINE;
-		} else if (show.getContent().equals("away")) {
-			return Presences.AWAY;
-		} else if (show.getContent().equals("xa")) {
-			return Presences.XA;
-		} else if (show.getContent().equals("chat")) {
-			return Presences.CHAT;
-		} else if (show.getContent().equals("dnd")) {
-			return Presences.DND;
-		} else {
-			return Presences.OFFLINE;
+			if (presences.size() < 1) { return null; }
+			return Collections.min(presences.values());
 		}
 	}
 
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/ServiceDiscoveryResult.java b/src/main/java/de/thedevstack/conversationsplus/entities/ServiceDiscoveryResult.java
new file mode 100644
index 00000000..cfba7c4f
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/ServiceDiscoveryResult.java
@@ -0,0 +1,265 @@
+package de.thedevstack.conversationsplus.entities;
+
+import android.content.ContentValues;
+import android.database.Cursor;
+import android.util.Base64;
+import java.io.UnsupportedEncodingException;
+import java.lang.Comparable;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.forms.Data;
+import de.thedevstack.conversationsplus.xmpp.stanzas.IqPacket;
+
+public class ServiceDiscoveryResult {
+	public static final String TABLENAME = "discovery_results";
+	public static final String HASH = "hash";
+	public static final String VER = "ver";
+	public static final String RESULT = "result";
+
+	protected static String blankNull(String s) {
+		return s == null ? "" : s;
+	}
+
+	public static class Identity implements Comparable {
+		protected final String category;
+		protected final String type;
+		protected final String lang;
+		protected final String name;
+
+		public Identity(final String category, final String type, final String lang, final String name) {
+			this.category = category;
+			this.type = type;
+			this.lang = lang;
+			this.name = name;
+		}
+
+		public Identity(final Element el) {
+			this(
+				el.getAttribute("category"),
+				el.getAttribute("type"),
+				el.getAttribute("xml:lang"),
+				el.getAttribute("name")
+			);
+		}
+
+		public Identity(final JSONObject o) {
+			this(
+				o.optString("category", null),
+				o.optString("type", null),
+				o.optString("lang", null),
+				o.optString("name", null)
+			);
+		}
+
+		public String getCategory() {
+			return this.category;
+		}
+
+		public String getType() {
+			return this.type;
+		}
+
+		public String getLang() {
+			return this.lang;
+		}
+
+		public String getName() {
+			return this.name;
+		}
+
+		public int compareTo(Object other) {
+			Identity o = (Identity)other;
+			int r = blankNull(this.getCategory()).compareTo(blankNull(o.getCategory()));
+			if(r == 0) {
+				r = blankNull(this.getType()).compareTo(blankNull(o.getType()));
+			}
+			if(r == 0) {
+				r = blankNull(this.getLang()).compareTo(blankNull(o.getLang()));
+			}
+			if(r == 0) {
+				r = blankNull(this.getName()).compareTo(blankNull(o.getName()));
+			}
+
+			return r;
+		}
+
+		public JSONObject toJSON() {
+			try {
+				JSONObject o = new JSONObject();
+				o.put("category", this.getCategory());
+				o.put("type", this.getType());
+				o.put("lang", this.getLang());
+				o.put("name", this.getName());
+				return o;
+			} catch(JSONException e) {
+				return null;
+			}
+		}
+	}
+
+	protected final String hash;
+	protected final byte[] ver;
+	protected final List<Identity> identities;
+	protected final List<String> features;
+	protected final List<Data> forms;
+
+	public ServiceDiscoveryResult(final IqPacket packet) {
+		this.identities = new ArrayList<>();
+		this.features = new ArrayList<>();
+		this.forms = new ArrayList<>();
+		this.hash = "sha-1"; // We only support sha-1 for now
+
+		final List<Element> elements = packet.query().getChildren();
+
+		for (final Element element : elements) {
+			if (element.getName().equals("identity")) {
+				Identity id = new Identity(element);
+				if (id.getType() != null && id.getCategory() != null) {
+					identities.add(id);
+				}
+			} else if (element.getName().equals("feature")) {
+				if (element.getAttribute("var") != null) {
+					features.add(element.getAttribute("var"));
+				}
+			} else if (element.getName().equals("x") && "jabber:x:data".equals(element.getAttribute("xmlns"))) {
+				forms.add(Data.parse(element));
+			}
+		}
+		this.ver = this.mkCapHash();
+	}
+
+	public ServiceDiscoveryResult(String hash, byte[] ver, JSONObject o) throws JSONException {
+		this.identities = new ArrayList<>();
+		this.features = new ArrayList<>();
+		this.forms = new ArrayList<>();
+		this.hash = hash;
+		this.ver = ver;
+
+		JSONArray identities = o.optJSONArray("identities");
+		if (identities != null) {
+			for (int i = 0; i < identities.length(); i++) {
+				this.identities.add(new Identity(identities.getJSONObject(i)));
+			}
+		}
+		JSONArray features = o.optJSONArray("features");
+		if (features != null) {
+			for (int i = 0; i < features.length(); i++) {
+				this.features.add(features.getString(i));
+			}
+		}
+	}
+
+	public String getVer() {
+		return new String(Base64.encode(this.ver, Base64.DEFAULT));
+	}
+
+	public ServiceDiscoveryResult(Cursor cursor) throws JSONException {
+		this(
+			cursor.getString(cursor.getColumnIndex(HASH)),
+			Base64.decode(cursor.getString(cursor.getColumnIndex(VER)), Base64.DEFAULT),
+			new JSONObject(cursor.getString(cursor.getColumnIndex(RESULT)))
+		);
+	}
+
+	public List<Identity> getIdentities() {
+		return this.identities;
+	}
+
+	public List<String> getFeatures() {
+		return this.features;
+	}
+
+	public boolean hasIdentity(String category, String type) {
+		for(Identity id : this.getIdentities()) {
+			if((category == null || id.getCategory().equals(category)) &&
+			   (type == null || id.getType().equals(type))) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	protected byte[] mkCapHash() {
+		StringBuilder s = new StringBuilder();
+
+		List<Identity> identities = this.getIdentities();
+		Collections.sort(identities);
+
+		for(Identity id : identities) {
+			s.append(
+				blankNull(id.getCategory()) + "/" +
+				blankNull(id.getType()) + "/" +
+				blankNull(id.getLang()) + "/" +
+				blankNull(id.getName()) + "<"
+			);
+		}
+
+		List<String> features = this.getFeatures();
+		Collections.sort(features);
+
+		for (String feature : features) {
+			s.append(feature + "<");
+		}
+
+		Collections.sort(forms, new Comparator<Data>() {
+			@Override
+			public int compare(Data lhs, Data rhs) {
+				return lhs.getFormType().compareTo(rhs.getFormType());
+			}
+		});
+
+		for(Data form : forms) {
+			s.append(form.getFormType()+"<");
+			//TODO append fields and values
+		}
+
+		MessageDigest md;
+		try {
+			md = MessageDigest.getInstance("SHA-1");
+		} catch (NoSuchAlgorithmException e) {
+			return null;
+		}
+
+		try {
+			return md.digest(s.toString().getBytes("UTF-8"));
+		} catch(UnsupportedEncodingException e) {
+			return null;
+		}
+	}
+
+	public JSONObject toJSON() {
+		try {
+			JSONObject o = new JSONObject();
+
+			JSONArray ids = new JSONArray();
+			for(Identity id : this.getIdentities()) {
+				ids.put(id.toJSON());
+			}
+			o.put("identites", ids);
+
+			o.put("features", new JSONArray(this.getFeatures()));
+
+			return o;
+		} catch(JSONException e) {
+			return null;
+		}
+	}
+
+	public ContentValues getContentValues() {
+		final ContentValues values = new ContentValues();
+		values.put(HASH, this.hash);
+		values.put(VER, getVer());
+		values.put(RESULT, this.toJSON().toString());
+		return values;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/Transferable.java b/src/main/java/de/thedevstack/conversationsplus/entities/Transferable.java
index a5bdb5d7..b03d0fe0 100644
--- a/src/main/java/de/thedevstack/conversationsplus/entities/Transferable.java
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/Transferable.java
@@ -4,7 +4,7 @@ public interface Transferable {
 
 	String[] VALID_IMAGE_EXTENSIONS = {"webp", "jpeg", "jpg", "png", "jpe"};
 	String[] VALID_CRYPTO_EXTENSIONS = {"pgp", "gpg", "otr"};
-	String[] WELL_KNOWN_EXTENSIONS = {"pdf","m4a"};
+	String[] WELL_KNOWN_EXTENSIONS = {"pdf","m4a","mp4"};
 
 	int STATUS_UNKNOWN = 0x200;
 	int STATUS_CHECKING = 0x201;
diff --git a/src/main/java/de/thedevstack/conversationsplus/generator/AbstractGenerator.java b/src/main/java/de/thedevstack/conversationsplus/generator/AbstractGenerator.java
index 5a6c6ebf..2d825f2c 100644
--- a/src/main/java/de/thedevstack/conversationsplus/generator/AbstractGenerator.java
+++ b/src/main/java/de/thedevstack/conversationsplus/generator/AbstractGenerator.java
@@ -14,6 +14,7 @@ import java.util.TimeZone;
 
 import de.thedevstack.conversationsplus.ConversationsPlusApplication;
 import de.tzur.conversations.Settings;
+import de.thedevstack.conversationsplus.crypto.axolotl.AxolotlService;
 
 public abstract class AbstractGenerator {
 	private final String[] FEATURES = {
@@ -26,15 +27,16 @@ public abstract class AbstractGenerator {
 			"http://jabber.org/protocol/caps",
 			"http://jabber.org/protocol/disco#info",
 			"urn:xmpp:avatar:metadata+notify",
+			"http://jabber.org/protocol/nick+notify",
 			"urn:xmpp:ping",
 			"jabber:iq:version",
-			"http://jabber.org/protocol/chatstates"};
+			"http://jabber.org/protocol/chatstates",
+			AxolotlService.PEP_DEVICE_LIST+"+notify"};
 	private final String[] MESSAGE_CONFIRMATION_FEATURES = {
 			"urn:xmpp:chat-markers:0",
 			"urn:xmpp:receipts"
 	};
-	private String mVersion = null;
-	public final String IDENTITY_TYPE = "phone";
+	protected final String IDENTITY_TYPE = "phone";
 
 	private static final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US);
 
diff --git a/src/main/java/de/thedevstack/conversationsplus/generator/IqGenerator.java b/src/main/java/de/thedevstack/conversationsplus/generator/IqGenerator.java
index 8f6b128f..df46f2b7 100644
--- a/src/main/java/de/thedevstack/conversationsplus/generator/IqGenerator.java
+++ b/src/main/java/de/thedevstack/conversationsplus/generator/IqGenerator.java
@@ -1,9 +1,23 @@
 package de.thedevstack.conversationsplus.generator;
 
+
+import android.util.Base64;
+import android.util.Log;
+
+import org.whispersystems.libaxolotl.IdentityKey;
+import org.whispersystems.libaxolotl.ecc.ECPublicKey;
+import org.whispersystems.libaxolotl.state.PreKeyRecord;
+import org.whispersystems.libaxolotl.state.SignedPreKeyRecord;
+
+import java.security.cert.CertificateEncodingException;
+import java.security.cert.X509Certificate;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Set;
 
 import de.thedevstack.conversationsplus.ConversationsPlusApplication;
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.crypto.axolotl.AxolotlService;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Conversation;
 import de.thedevstack.conversationsplus.entities.DownloadableFile;
@@ -42,6 +56,34 @@ public class IqGenerator extends AbstractGenerator {
 		return packet;
 	}
 
+	protected IqPacket publish(final String node, final Element item) {
+		final IqPacket packet = new IqPacket(IqPacket.TYPE.SET);
+		final Element pubsub = packet.addChild("pubsub",
+				"http://jabber.org/protocol/pubsub");
+		final Element publish = pubsub.addChild("publish");
+		publish.setAttribute("node", node);
+		publish.addChild(item);
+		return packet;
+	}
+
+	protected IqPacket retrieve(String node, Element item) {
+		final IqPacket packet = new IqPacket(IqPacket.TYPE.GET);
+		final Element pubsub = packet.addChild("pubsub",
+				"http://jabber.org/protocol/pubsub");
+		final Element items = pubsub.addChild("items");
+		items.setAttribute("node", node);
+		if (item != null) {
+			items.addChild(item);
+		}
+		return packet;
+	}
+
+	public IqPacket publishNick(String nick) {
+		final Element item = new Element("item");
+		item.addChild("nick","http://jabber.org/protocol/nick").setContent(nick);
+		return publish("http://jabber.org/protocol/nick", item);
+	}
+
 	public static IqPacket retrieveVcardAvatar(final Avatar avatar) {
 		final IqPacket packet = new IqPacket(IqPacket.TYPE.GET);
 		packet.setTo(avatar.owner);
@@ -49,10 +91,81 @@ public class IqGenerator extends AbstractGenerator {
 		return packet;
 	}
 
+	public IqPacket retrieveDeviceIds(final Jid to) {
+		final IqPacket packet = retrieve(AxolotlService.PEP_DEVICE_LIST, null);
+		if(to != null) {
+			packet.setTo(to);
+		}
+		return packet;
+	}
+
+	public IqPacket retrieveBundlesForDevice(final Jid to, final int deviceid) {
+		final IqPacket packet = retrieve(AxolotlService.PEP_BUNDLES+":"+deviceid, null);
+		packet.setTo(to);
+		return packet;
+	}
+
+	public IqPacket retrieveVerificationForDevice(final Jid to, final int deviceid) {
+		final IqPacket packet = retrieve(AxolotlService.PEP_VERIFICATION+":"+deviceid, null);
+		packet.setTo(to);
+		return packet;
+	}
+
+	public IqPacket publishDeviceIds(final Set<Integer> ids) {
+		final Element item = new Element("item");
+		final Element list = item.addChild("list", AxolotlService.PEP_PREFIX);
+		for(Integer id:ids) {
+			final Element device = new Element("device");
+			device.setAttribute("id", id);
+			list.addChild(device);
+		}
+		return publish(AxolotlService.PEP_DEVICE_LIST, item);
+	}
+
+	public IqPacket publishBundles(final SignedPreKeyRecord signedPreKeyRecord, final IdentityKey identityKey,
+	                               final Set<PreKeyRecord> preKeyRecords, final int deviceId) {
+		final Element item = new Element("item");
+		final Element bundle = item.addChild("bundle", AxolotlService.PEP_PREFIX);
+		final Element signedPreKeyPublic = bundle.addChild("signedPreKeyPublic");
+		signedPreKeyPublic.setAttribute("signedPreKeyId", signedPreKeyRecord.getId());
+		ECPublicKey publicKey = signedPreKeyRecord.getKeyPair().getPublicKey();
+		signedPreKeyPublic.setContent(Base64.encodeToString(publicKey.serialize(),Base64.DEFAULT));
+		final Element signedPreKeySignature = bundle.addChild("signedPreKeySignature");
+		signedPreKeySignature.setContent(Base64.encodeToString(signedPreKeyRecord.getSignature(),Base64.DEFAULT));
+		final Element identityKeyElement = bundle.addChild("identityKey");
+		identityKeyElement.setContent(Base64.encodeToString(identityKey.serialize(), Base64.DEFAULT));
+
+		final Element prekeys = bundle.addChild("prekeys", AxolotlService.PEP_PREFIX);
+		for(PreKeyRecord preKeyRecord:preKeyRecords) {
+			final Element prekey = prekeys.addChild("preKeyPublic");
+			prekey.setAttribute("preKeyId", preKeyRecord.getId());
+			prekey.setContent(Base64.encodeToString(preKeyRecord.getKeyPair().getPublicKey().serialize(), Base64.DEFAULT));
+		}
+
+		return publish(AxolotlService.PEP_BUNDLES+":"+deviceId, item);
+	}
+
+	public IqPacket publishVerification(byte[] signature, X509Certificate[] certificates, final int deviceId) {
+		final Element item = new Element("item");
+		final Element verification = item.addChild("verification", AxolotlService.PEP_PREFIX);
+		final Element chain = verification.addChild("chain");
+		for(int i = 0; i < certificates.length; ++i) {
+			try {
+				Element certificate = chain.addChild("certificate");
+				certificate.setContent(Base64.encodeToString(certificates[i].getEncoded(), Base64.DEFAULT));
+				certificate.setAttribute("index",i);
+			} catch (CertificateEncodingException e) {
+				Log.d(Config.LOGTAG, "could not encode certificate");
+			}
+		}
+		verification.addChild("signature").setContent(Base64.encodeToString(signature, Base64.DEFAULT));
+		return publish(AxolotlService.PEP_VERIFICATION+":"+deviceId, item);
+	}
+
 	public IqPacket queryMessageArchiveManagement(final MessageArchiveService.Query mam) {
 		final IqPacket packet = new IqPacket(IqPacket.TYPE.SET);
 		final Element query = packet.query("urn:xmpp:mam:0");
-		query.setAttribute("queryid",mam.getQueryId());
+		query.setAttribute("queryid", mam.getQueryId());
 		final Data data = new Data();
 		data.setFormType("urn:xmpp:mam:0");
 		if (mam.muc()) {
@@ -60,8 +173,9 @@ public class IqGenerator extends AbstractGenerator {
 		} else if (mam.getWith()!=null) {
 			data.put("with", mam.getWith().toString());
 		}
-		data.put("start",getTimestamp(mam.getStart()));
-		data.put("end",getTimestamp(mam.getEnd()));
+		data.put("start", getTimestamp(mam.getStart()));
+		data.put("end", getTimestamp(mam.getEnd()));
+		data.submit();
 		query.addChild(data);
 		if (mam.getPagingOrder() == MessageArchiveService.PagingOrder.REVERSE) {
 			query.addChild("set", "http://jabber.org/protocol/rsm").addChild("before").setContent(mam.getReference());
@@ -130,12 +244,52 @@ public class IqGenerator extends AbstractGenerator {
 		return packet;
 	}
 
-	public IqPacket requestHttpUploadSlot(Jid host, DownloadableFile file) {
+	public IqPacket requestHttpUploadSlot(Jid host, DownloadableFile file, String mime) {
 		IqPacket packet = new IqPacket(IqPacket.TYPE.GET);
 		packet.setTo(host);
-		Element request = packet.addChild("request",Xmlns.HTTP_UPLOAD);
+		Element request = packet.addChild("request", Xmlns.HTTP_UPLOAD);
 		request.addChild("filename").setContent(file.getName());
 		request.addChild("size").setContent(String.valueOf(file.getExpectedSize()));
+		if (mime != null) {
+			request.addChild("content-type").setContent(mime);
+		}
+		return packet;
+	}
+
+	public IqPacket generateCreateAccountWithCaptcha(Account account, String id, Data data) {
+		final IqPacket register = new IqPacket(IqPacket.TYPE.SET);
+
+		register.setTo(account.getServer());
+		register.setId(id);
+		register.query("jabber:iq:register").addChild(data);
+
+		return register;
+	}
+
+	public IqPacket pushTokenToAppServer(Jid appServer, String token, String deviceId) {
+		IqPacket packet = new IqPacket(IqPacket.TYPE.SET);
+		packet.setTo(appServer);
+		Element command = packet.addChild("command", "http://jabber.org/protocol/commands");
+		command.setAttribute("node","register-push-gcm");
+		command.setAttribute("action","execute");
+		Data data = new Data();
+		data.put("token", token);
+		data.put("device-id", deviceId);
+		data.submit();
+		command.addChild(data);
+		return packet;
+	}
+
+	public IqPacket enablePush(Jid jid, String node, String secret) {
+		IqPacket packet = new IqPacket(IqPacket.TYPE.SET);
+		Element enable = packet.addChild("enable","urn:xmpp:push:0");
+		enable.setAttribute("jid",jid.toString());
+		enable.setAttribute("node", node);
+		Data data = new Data();
+		data.setFormType("http://jabber.org/protocol/pubsub#publish-options");
+		data.put("secret",secret);
+		data.submit();
+		enable.addChild(data);
 		return packet;
 	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/generator/MessageGenerator.java b/src/main/java/de/thedevstack/conversationsplus/generator/MessageGenerator.java
index af496fe1..2e49ebfe 100644
--- a/src/main/java/de/thedevstack/conversationsplus/generator/MessageGenerator.java
+++ b/src/main/java/de/thedevstack/conversationsplus/generator/MessageGenerator.java
@@ -1,14 +1,16 @@
 package de.thedevstack.conversationsplus.generator;
 
+import net.java.otr4j.OtrException;
+import net.java.otr4j.session.Session;
+
 import java.text.SimpleDateFormat;
+import java.util.ArrayList;
 import java.util.Date;
 import java.util.Locale;
 import java.util.TimeZone;
 
-import net.java.otr4j.OtrException;
-import net.java.otr4j.session.Session;
-
 import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
+import de.thedevstack.conversationsplus.crypto.axolotl.XmppAxolotlMessage;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Conversation;
 import de.thedevstack.conversationsplus.entities.Message;
@@ -19,7 +21,7 @@ import de.thedevstack.conversationsplus.xmpp.stanzas.MessagePacket;
 
 public class MessageGenerator extends AbstractGenerator {
 
-	private MessagePacket preparePacket(Message message, boolean addDelay) {
+	private MessagePacket preparePacket(Message message) {
 		Conversation conversation = message.getConversation();
 		Account account = conversation.getAccount();
 		MessagePacket packet = new MessagePacket();
@@ -42,13 +44,13 @@ public class MessageGenerator extends AbstractGenerator {
 		}
 		packet.setFrom(account.getJid());
 		packet.setId(message.getUuid());
-		if (addDelay) {
-			addDelay(packet, message.getTimeSent());
+		if (message.edited()) {
+			packet.addChild("replace","urn:xmpp:message-correct:0").setAttribute("id",message.getEditedId());
 		}
 		return packet;
 	}
 
-	private void addDelay(MessagePacket packet, long timestamp) {
+	public void addDelay(MessagePacket packet, long timestamp) {
 		final SimpleDateFormat mDateFormat = new SimpleDateFormat(
 				"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
 		mDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
@@ -57,20 +59,39 @@ public class MessageGenerator extends AbstractGenerator {
 		delay.setAttribute("stamp", mDateFormat.format(date));
 	}
 
-	public MessagePacket generateOtrChat(Message message) {
-		return generateOtrChat(message, false);
+	public MessagePacket generateAxolotlChat(Message message, XmppAxolotlMessage axolotlMessage) {
+		MessagePacket packet = preparePacket(message);
+		if (axolotlMessage == null) {
+			return null;
+		}
+		packet.setAxolotlMessage(axolotlMessage.toElement());
+		packet.addChild("store", "urn:xmpp:hints");
+		return packet;
+	}
+
+    public static void addXhtmlImImage(MessagePacket packet, Message.FileParams params) {
+        Element html = packet.addChild("html", "http://jabber.org/protocol/xhtml-im");
+        Element body = html.addChild("body", "http://www.w3.org/1999/xhtml");
+        Element img = body.addChild("img");
+        img.setAttribute("src", params.url.toString());
+        img.setAttribute("height", params.height);
+        img.setAttribute("width", params.width);
+    }
+
+	public static void addMessageHints(MessagePacket packet) {
+		packet.addChild("private", "urn:xmpp:carbons:2");
+		packet.addChild("no-copy", "urn:xmpp:hints");
+		packet.addChild("no-permanent-store", "urn:xmpp:hints");
+		packet.addChild("no-permanent-storage", "urn:xmpp:hints"); //do not copy this. this is wrong. it is *store*
 	}
 
-	public MessagePacket generateOtrChat(Message message, boolean addDelay) {
+	public MessagePacket generateOtrChat(Message message) {
 		Session otrSession = message.getConversation().getOtrSession();
 		if (otrSession == null) {
 			return null;
 		}
-		MessagePacket packet = preparePacket(message, addDelay);
-		packet.addChild("private", "urn:xmpp:carbons:2");
-		packet.addChild("no-copy", "urn:xmpp:hints");
-		packet.addChild("no-permanent-store", "urn:xmpp:hints");
-		packet.addChild("no-permanent-storage", "urn:xmpp:hints");
+		MessagePacket packet = preparePacket(message);
+		addMessageHints(packet);
 		try {
 			String content;
 			if (message.hasFileOnRemoteHost()) {
@@ -86,25 +107,24 @@ public class MessageGenerator extends AbstractGenerator {
 	}
 
 	public MessagePacket generateChat(Message message) {
-		return generateChat(message, false);
-	}
-
-	public MessagePacket generateChat(Message message, boolean addDelay) {
-		MessagePacket packet = preparePacket(message, addDelay);
+		MessagePacket packet = preparePacket(message);
+		String content;
 		if (message.hasFileOnRemoteHost()) {
-			packet.setBody(message.getFileParams().url.toString());
+			Message.FileParams fileParams = message.getFileParams();
+			content = fileParams.url.toString();
+			packet.addChild("x","jabber:x:oob").addChild("url").setContent(content);
+            if (fileParams.width > 0 && fileParams.height > 0) {
+                addXhtmlImImage(packet,fileParams);
+            }
 		} else {
-			packet.setBody(message.getBody());
+			content = message.getBody();
 		}
+		packet.setBody(content);
 		return packet;
 	}
 
 	public MessagePacket generatePgpChat(Message message) {
-		return generatePgpChat(message, false);
-	}
-
-	public MessagePacket generatePgpChat(Message message, boolean addDelay) {
-		MessagePacket packet = preparePacket(message, addDelay);
+		MessagePacket packet = preparePacket(message);
 		packet.setBody("This is an XEP-0027 encrypted message");
 		if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 			packet.addChild("x", "jabber:x:encrypted").setContent(message.getEncryptedBody());
@@ -117,25 +137,26 @@ public class MessageGenerator extends AbstractGenerator {
 	public MessagePacket generateChatState(Conversation conversation) {
 		final Account account = conversation.getAccount();
 		MessagePacket packet = new MessagePacket();
+		packet.setType(MessagePacket.TYPE_CHAT);
 		packet.setTo(conversation.getJid().toBareJid());
 		packet.setFrom(account.getJid());
 		packet.addChild(ChatState.toElement(conversation.getOutgoingChatState()));
+		packet.addChild("no-store", "urn:xmpp:hints");
+		packet.addChild("no-storage", "urn:xmpp:hints"); //wrong! don't copy this. Its *store*
 		return packet;
 	}
 
 	public MessagePacket confirm(final Account account, final Jid to, final String id) {
 		MessagePacket packet = new MessagePacket();
-		packet.setType(MessagePacket.TYPE_NORMAL);
+		packet.setType(MessagePacket.TYPE_CHAT);
 		packet.setTo(to);
 		packet.setFrom(account.getJid());
-		Element received = packet.addChild("displayed",
-				"urn:xmpp:chat-markers:0");
+		Element received = packet.addChild("displayed", "urn:xmpp:chat-markers:0");
 		received.setAttribute("id", id);
 		return packet;
 	}
 
-	public MessagePacket conferenceSubject(Conversation conversation,
-			String subject) {
+	public MessagePacket conferenceSubject(Conversation conversation,String subject) {
 		MessagePacket packet = new MessagePacket();
 		packet.setType(MessagePacket.TYPE_GROUPCHAT);
 		packet.setTo(conversation.getJid().toBareJid());
@@ -169,14 +190,14 @@ public class MessageGenerator extends AbstractGenerator {
 		return packet;
 	}
 
-	public MessagePacket received(Account account,
-			MessagePacket originalMessage, String namespace) {
+	public MessagePacket received(Account account, MessagePacket originalMessage, ArrayList<String> namespaces, int type) {
 		MessagePacket receivedPacket = new MessagePacket();
-		receivedPacket.setType(MessagePacket.TYPE_NORMAL);
+		receivedPacket.setType(type);
 		receivedPacket.setTo(originalMessage.getFrom());
 		receivedPacket.setFrom(account.getJid());
-		Element received = receivedPacket.addChild("received", namespace);
-		received.setAttribute("id", originalMessage.getId());
+		for(String namespace : namespaces) {
+			receivedPacket.addChild("received", namespace).setAttribute("id", originalMessage.getId());
+		}
 		return receivedPacket;
 	}
 
diff --git a/src/main/java/de/thedevstack/conversationsplus/generator/PresenceGenerator.java b/src/main/java/de/thedevstack/conversationsplus/generator/PresenceGenerator.java
index 1656bd51..f370c6e0 100644
--- a/src/main/java/de/thedevstack/conversationsplus/generator/PresenceGenerator.java
+++ b/src/main/java/de/thedevstack/conversationsplus/generator/PresenceGenerator.java
@@ -2,6 +2,7 @@ package de.thedevstack.conversationsplus.generator;
 
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.entities.Presence;
 import de.thedevstack.conversationsplus.xml.Element;
 import de.thedevstack.conversationsplus.xmpp.stanzas.PresencePacket;
 
@@ -31,12 +32,14 @@ public class PresenceGenerator extends AbstractGenerator {
 		return subscription("subscribed", contact);
 	}
 
-	public PresencePacket sendPresence(Account account) {
+	public PresencePacket selfPresence(Account account, Presence.Status status) {
 		PresencePacket packet = new PresencePacket();
+		if(status.toShowString() != null) {
+			packet.addChild("show").setContent(status.toShowString());
+		}
 		packet.setFrom(account.getJid());
 		String sig = account.getPgpSignature();
 		if (sig != null) {
-			packet.addChild("status").setContent("online");
 			packet.addChild("x", "jabber:x:signed").setContent(sig);
 		}
 		String capHash = getCapHash();
diff --git a/src/main/java/de/thedevstack/conversationsplus/http/HttpConnectionManager.java b/src/main/java/de/thedevstack/conversationsplus/http/HttpConnectionManager.java
index 484e77a3..59c54662 100644
--- a/src/main/java/de/thedevstack/conversationsplus/http/HttpConnectionManager.java
+++ b/src/main/java/de/thedevstack/conversationsplus/http/HttpConnectionManager.java
@@ -2,6 +2,10 @@ package de.thedevstack.conversationsplus.http;
 
 import org.apache.http.conn.ssl.StrictHostnameVerifier;
 
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.Proxy;
 import java.security.KeyManagementException;
 import java.security.NoSuchAlgorithmException;
 import java.util.List;
@@ -17,6 +21,7 @@ import de.thedevstack.conversationsplus.entities.Message;
 import de.thedevstack.conversationsplus.services.AbstractConnectionManager;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
 import de.thedevstack.conversationsplus.utils.CryptoHelper;
+import de.thedevstack.conversationsplus.utils.SSLSocketHelper;
 
 public class HttpConnectionManager extends AbstractConnectionManager {
 
@@ -38,9 +43,9 @@ public class HttpConnectionManager extends AbstractConnectionManager {
 		return connection;
 	}
 
-	public HttpUploadConnection createNewUploadConnection(Message message) {
+	public HttpUploadConnection createNewUploadConnection(Message message, boolean delay) {
 		HttpUploadConnection connection = new HttpUploadConnection(this);
-		connection.init(message);
+		connection.init(message,delay);
 		this.uploadConnections.add(connection);
 		return connection;
 	}
@@ -70,7 +75,7 @@ public class HttpConnectionManager extends AbstractConnectionManager {
 							new StrictHostnameVerifier());
 		}
 		try {
-			final SSLContext sc = SSLContext.getInstance("TLS");
+			final SSLContext sc = SSLSocketHelper.getSSLContext();
 			sc.init(null, new X509TrustManager[]{trustManager},
 					mXmppConnectionService.getRNG());
 
@@ -87,4 +92,8 @@ public class HttpConnectionManager extends AbstractConnectionManager {
 		} catch (final KeyManagementException | NoSuchAlgorithmException ignored) {
 		}
 	}
+
+	public Proxy getProxy() throws IOException {
+		return new Proxy(Proxy.Type.HTTP, new InetSocketAddress(InetAddress.getLocalHost(), 8118));
+	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/http/HttpDownloadConnection.java b/src/main/java/de/thedevstack/conversationsplus/http/HttpDownloadConnection.java
index d8859df5..4381ed03 100644
--- a/src/main/java/de/thedevstack/conversationsplus/http/HttpDownloadConnection.java
+++ b/src/main/java/de/thedevstack/conversationsplus/http/HttpDownloadConnection.java
@@ -2,30 +2,36 @@ package de.thedevstack.conversationsplus.http;
 
 import android.content.Intent;
 import android.net.Uri;
-import android.os.SystemClock;
+import android.os.PowerManager;
 
 import java.io.BufferedInputStream;
 import java.io.IOException;
+import java.io.InputStream;
 import java.io.OutputStream;
 import java.net.HttpURLConnection;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.Arrays;
+import java.util.concurrent.CancellationException;
 
 import javax.net.ssl.HttpsURLConnection;
 import javax.net.ssl.SSLHandshakeException;
 
 import de.thedevstack.android.logcat.Logging;
-import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.ConversationsPlusApplication;
 import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
+import de.thedevstack.conversationsplus.utils.MessageUtil;
+import de.thedevstack.conversationsplus.utils.StreamUtil;
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.R;
-import de.thedevstack.conversationsplus.entities.Transferable;
 import de.thedevstack.conversationsplus.entities.DownloadableFile;
 import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.entities.Transferable;
+import de.thedevstack.conversationsplus.entities.TransferablePlaceholder;
 import de.thedevstack.conversationsplus.persistance.FileBackend;
+import de.thedevstack.conversationsplus.services.AbstractConnectionManager;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
 import de.thedevstack.conversationsplus.utils.CryptoHelper;
-import de.thedevstack.conversationsplus.utils.MessageUtil;
 
 public class HttpDownloadConnection implements Transferable {
 
@@ -38,7 +44,7 @@ public class HttpDownloadConnection implements Transferable {
 	private int mStatus = Transferable.STATUS_UNKNOWN;
 	private boolean acceptedAutomatically = false;
 	private int mProgress = 0;
-	private long mLastGuiRefresh = 0;
+    private boolean canceled = false;
 
 	public HttpDownloadConnection(HttpConnectionManager manager) {
 		this.mHttpConnectionManager = manager;
@@ -64,39 +70,45 @@ public class HttpDownloadConnection implements Transferable {
 	}
 
 	public void init(Message message, boolean interactive) {
-		this.message = message;
-		this.message.setTransferable(this);
-		try {
-			mUrl = new URL(message.getBody());
-			String[] parts = mUrl.getPath().toLowerCase().split("\\.");
-			String lastPart = parts.length >= 1 ? parts[parts.length - 1] : null;
-			String secondToLast = parts.length >= 2 ? parts[parts.length -2] : null;
-			if ("pgp".equals(lastPart) || "gpg".equals(lastPart)) {
-				this.message.setEncryption(Message.ENCRYPTION_PGP);
-			} else if (message.getEncryption() != Message.ENCRYPTION_OTR) {
-				this.message.setEncryption(Message.ENCRYPTION_NONE);
-			}
-			String extension;
-			if (Arrays.asList(VALID_CRYPTO_EXTENSIONS).contains(lastPart)) {
-				extension = secondToLast;
-			} else {
-				extension = lastPart;
-			}
-			message.setRelativeFilePath(message.getUuid()+"."+extension);
-			this.file = FileBackend.getFile(message, false);
-			String reference = mUrl.getRef();
-			if (reference != null && reference.length() == 96) {
-				this.file.setKey(CryptoHelper.hexToBytes(reference));
-			}
-
-			if (this.message.getEncryption() == Message.ENCRYPTION_OTR
-					&& this.file.getKey() == null) {
-				this.message.setEncryption(Message.ENCRYPTION_NONE);
-					}
-			checkFileSize(interactive);
-		} catch (MalformedURLException e) {
-			this.cancel();
-		}
+        this.message = message;
+        this.message.setTransferable(this);
+        try {
+            if (message.hasFileOnRemoteHost()) {
+                mUrl = message.getFileParams().url;
+            } else {
+                mUrl = new URL(message.getBody());
+            }
+            String[] parts = mUrl.getPath().toLowerCase().split("\\.");
+            String lastPart = parts.length >= 1 ? parts[parts.length - 1] : null;
+            String secondToLast = parts.length >= 2 ? parts[parts.length -2] : null;
+            if ("pgp".equals(lastPart) || "gpg".equals(lastPart)) {
+                this.message.setEncryption(Message.ENCRYPTION_PGP);
+            } else if (message.getEncryption() != Message.ENCRYPTION_OTR
+                    && message.getEncryption() != Message.ENCRYPTION_AXOLOTL) {
+                this.message.setEncryption(Message.ENCRYPTION_NONE);
+            }
+            String extension;
+            if (Arrays.asList(VALID_CRYPTO_EXTENSIONS).contains(lastPart)) {
+                extension = secondToLast;
+            } else {
+                extension = lastPart;
+            }
+            message.setRelativeFilePath(message.getUuid()+"."+extension);
+            this.file = FileBackend.getFile(message, false);
+            String reference = mUrl.getRef();
+            if (reference != null && reference.length() == 96) {
+                this.file.setKeyAndIv(CryptoHelper.hexToBytes(reference));
+            }
+
+            if ((this.message.getEncryption() == Message.ENCRYPTION_OTR
+                    || this.message.getEncryption() == Message.ENCRYPTION_AXOLOTL)
+                    && this.file.getKey() == null) {
+                this.message.setEncryption(Message.ENCRYPTION_NONE);
+            }
+            checkFileSize(interactive);
+        } catch (MalformedURLException e) {
+            this.cancel();
+        }
 	}
 
 	private void checkFileSize(boolean interactive) {
@@ -104,21 +116,29 @@ public class HttpDownloadConnection implements Transferable {
 	}
 
 	public void cancel() {
-		mHttpConnectionManager.finishConnection(this);
-		message.setTransferable(null);
-		mXmppConnectionService.updateConversationUi();
+        this.canceled = true;
+        mHttpConnectionManager.finishConnection(this);
+        if (message.isFileOrImage()) {
+            message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_DELETED));
+        } else {
+            message.setTransferable(null);
+        }
+        mXmppConnectionService.updateConversationUi();
 	}
 
 	private void finish() {
-		Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
-		intent.setData(Uri.fromFile(file));
-		mXmppConnectionService.sendBroadcast(intent);
-		message.setTransferable(null);
-		mHttpConnectionManager.finishConnection(this);
-		mXmppConnectionService.updateConversationUi();
-		if (acceptedAutomatically) {
-			mXmppConnectionService.getNotificationService().push(message);
-		}
+        Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
+        intent.setData(Uri.fromFile(file));
+        mXmppConnectionService.sendBroadcast(intent);
+        message.setTransferable(null);
+        mHttpConnectionManager.finishConnection(this);
+        if (message.getEncryption() == Message.ENCRYPTION_PGP) {
+            message.getConversation().getAccount().getPgpDecryptionService().add(message);
+        }
+        mXmppConnectionService.updateConversationUi();
+        if (acceptedAutomatically) {
+            mXmppConnectionService.getNotificationService().push(message);
+        }
 	}
 
 	private void changeStatus(int status) {
@@ -126,6 +146,17 @@ public class HttpDownloadConnection implements Transferable {
 		mXmppConnectionService.updateConversationUi();
 	}
 
+	private void showToastForException(Exception e) {
+		e.printStackTrace();
+		if (e instanceof java.net.UnknownHostException) {
+			mXmppConnectionService.showErrorToastInUi(R.string.download_failed_server_not_found);
+		} else if (e instanceof java.net.ConnectException) {
+			mXmppConnectionService.showErrorToastInUi(R.string.download_failed_could_not_connect);
+		} else if (!(e instanceof CancellationException)) {
+			mXmppConnectionService.showErrorToastInUi(R.string.download_failed_file_not_found);
+		}
+	}
+
 	private class FileSizeChecker implements Runnable {
 
 		private boolean interactive = false;
@@ -147,7 +178,7 @@ public class HttpDownloadConnection implements Transferable {
 			} catch (IOException e) {
 				Logging.d(Config.LOGTAG, "io exception in http file size checker: " + e.getMessage());
 				if (interactive) {
-					mXmppConnectionService.showErrorToastInUi(R.string.file_not_found_on_remote_host);
+					showToastForException(e);
 				}
 				cancel();
 				return;
@@ -164,31 +195,38 @@ public class HttpDownloadConnection implements Transferable {
 		}
 
 		private long retrieveFileSize() throws IOException {
-			Logging.d(Config.LOGTAG,"retrieve file size. interactive:"+String.valueOf(interactive));
-			changeStatus(STATUS_CHECKING);
-			HttpURLConnection connection = (HttpURLConnection) mUrl.openConnection();
-			connection.setRequestMethod("HEAD");
-			if (connection instanceof HttpsURLConnection) {
-				mHttpConnectionManager.setupTrustManager((HttpsURLConnection) connection, interactive);
-			}
-			connection.connect();
-			String contentLength = connection.getHeaderField("Content-Length");
-			if (contentLength == null) {
-				return -1;
-			}
-			try {
-				return Long.parseLong(contentLength, 10);
-			} catch (NumberFormatException e) {
-				return -1;
-			}
+            try {
+                Logging.d(Config.LOGTAG, "retrieve file size. interactive:" + String.valueOf(interactive));
+                changeStatus(STATUS_CHECKING);
+                HttpURLConnection connection = (HttpURLConnection) mUrl.openConnection();
+                connection.setRequestMethod("HEAD");
+                Logging.d(Config.LOGTAG, "url: "+connection.getURL().toString());
+                Logging.d(Config.LOGTAG, "connection: "+connection.toString());
+                connection.setRequestProperty("User-Agent", ConversationsPlusApplication.getNameAndVersion());
+                if (connection instanceof HttpsURLConnection) {
+                    mHttpConnectionManager.setupTrustManager((HttpsURLConnection) connection, interactive);
+                }
+                connection.connect();
+                String contentLength = connection.getHeaderField("Content-Length");
+                connection.disconnect();
+                if (contentLength == null) {
+                    return -1;
+                }
+                return Long.parseLong(contentLength, 10);
+            } catch (IOException e) {
+                return -1;
+            } catch (NumberFormatException e) {
+                return -1;
+            }
 		}
-
 	}
 
 	private class FileDownloader implements Runnable {
 
 		private boolean interactive = false;
 
+        private OutputStream os;
+
 		public FileDownloader(boolean interactive) {
 			this.interactive = interactive;
 		}
@@ -202,37 +240,69 @@ public class HttpDownloadConnection implements Transferable {
 				finish();
 			} catch (SSLHandshakeException e) {
 				changeStatus(STATUS_OFFER);
-			} catch (IOException e) {
-				mXmppConnectionService.showErrorToastInUi(R.string.file_not_found_on_remote_host);
-				cancel();
+			} catch (Exception e) {
+                if (interactive) {
+                    showToastForException(e);
+                }
+                cancel();
 			}
 		}
 
 		private void download() throws SSLHandshakeException, IOException {
-			HttpURLConnection connection = (HttpURLConnection) mUrl.openConnection();
-			if (connection instanceof HttpsURLConnection) {
-				mHttpConnectionManager.setupTrustManager((HttpsURLConnection) connection, interactive);
-			}
-			connection.connect();
-			BufferedInputStream is = new BufferedInputStream(connection.getInputStream());
-			file.getParentFile().mkdirs();
-			file.createNewFile();
-			OutputStream os = file.createOutputStream();
-			if (os == null) {
-				throw new IOException();
-			}
-			long transmitted = 0;
-			long expected = file.getExpectedSize();
-			int count = -1;
-			byte[] buffer = new byte[1024];
-			while ((count = is.read(buffer)) != -1) {
-				transmitted += count;
-				os.write(buffer, 0, count);
-				updateProgress((int) ((((double) transmitted) / expected) * 100));
-			}
-			os.flush();
-			os.close();
-			is.close();
+            InputStream is = null;
+            PowerManager.WakeLock wakeLock = mHttpConnectionManager.createWakeLock("http_download_"+message.getUuid());
+            try {
+                wakeLock.acquire();
+                HttpURLConnection connection = (HttpURLConnection) mUrl.openConnection();
+                if (connection instanceof HttpsURLConnection) {
+                    mHttpConnectionManager.setupTrustManager((HttpsURLConnection) connection, interactive);
+                }
+                connection.setRequestProperty("User-Agent", ConversationsPlusApplication.getNameAndVersion());
+                final boolean tryResume = file.exists() && file.getKey() == null;
+                if (tryResume) {
+                    Logging.d(Config.LOGTAG, "http download trying resume");
+                    long size = file.getSize();
+                    connection.setRequestProperty("Range", "bytes="+size+"-");
+                }
+                connection.connect();
+                is = new BufferedInputStream(connection.getInputStream());
+                boolean serverResumed = "bytes".equals(connection.getHeaderField("Accept-Ranges"));
+                long transmitted = 0;
+                long expected = file.getExpectedSize();
+                if (tryResume && serverResumed) {
+                    Logging.d(Config.LOGTAG, "server resumed");
+                    transmitted = file.getSize();
+                    updateProgress((int) ((((double) transmitted) / expected) * 100));
+                    os = AbstractConnectionManager.createAppendedOutputStream(file);
+                } else {
+                    file.getParentFile().mkdirs();
+                    file.createNewFile();
+                    os = AbstractConnectionManager.createOutputStream(file, true);
+                }
+                int count = -1;
+                byte[] buffer = new byte[1024];
+                while ((count = is.read(buffer)) != -1) {
+                    transmitted += count;
+                    os.write(buffer, 0, count);
+                    updateProgress((int) ((((double) transmitted) / expected) * 100));
+                    if (canceled) {
+                        throw new CancellationException();
+                    }
+                }
+            } catch (CancellationException | IOException e) {
+                throw e;
+            } finally {
+                if (os != null) {
+                    try {
+                        os.flush();
+                    } catch (final IOException ignored) {
+
+                    }
+                }
+                StreamUtil.close(os);
+                StreamUtil.close(is);
+                wakeLock.release();
+            }
 		}
 
 		private void updateImageBounds() {
@@ -240,15 +310,11 @@ public class HttpDownloadConnection implements Transferable {
 			MessageUtil.updateFileParams(message, mUrl);
 			mXmppConnectionService.updateMessage(message);
 		}
-
 	}
 
 	public void updateProgress(int i) {
-		this.mProgress = i;
-		if (SystemClock.elapsedRealtime() - this.mLastGuiRefresh > Config.PROGRESS_UI_UPDATE_INTERVAL) {
-			this.mLastGuiRefresh = SystemClock.elapsedRealtime();
-			mXmppConnectionService.updateConversationUi();
-		}
+        this.mProgress = i;
+        mXmppConnectionService.updateConversationUi();
 	}
 
 	@Override
diff --git a/src/main/java/de/thedevstack/conversationsplus/http/HttpUploadConnection.java b/src/main/java/de/thedevstack/conversationsplus/http/HttpUploadConnection.java
index 58488c99..5eab0a6b 100644
--- a/src/main/java/de/thedevstack/conversationsplus/http/HttpUploadConnection.java
+++ b/src/main/java/de/thedevstack/conversationsplus/http/HttpUploadConnection.java
@@ -1,7 +1,12 @@
 package de.thedevstack.conversationsplus.http;
 
 import android.app.PendingIntent;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.PowerManager;
+import android.util.Pair;
 
+import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
@@ -12,17 +17,19 @@ import java.net.URL;
 import javax.net.ssl.HttpsURLConnection;
 
 import de.thedevstack.android.logcat.Logging;
+import de.thedevstack.conversationsplus.ConversationsPlusApplication;
+import de.thedevstack.conversationsplus.utils.MessageUtil;
+import de.thedevstack.conversationsplus.utils.StreamUtil;
 import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.entities.Account;
-import de.thedevstack.conversationsplus.entities.Transferable;
 import de.thedevstack.conversationsplus.entities.DownloadableFile;
 import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.entities.Transferable;
 import de.thedevstack.conversationsplus.persistance.FileBackend;
+import de.thedevstack.conversationsplus.services.AbstractConnectionManager;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
 import de.thedevstack.conversationsplus.ui.UiCallback;
 import de.thedevstack.conversationsplus.utils.CryptoHelper;
-import de.thedevstack.conversationsplus.utils.MessageUtil;
-import de.thedevstack.conversationsplus.utils.StreamUtil;
 import de.thedevstack.conversationsplus.utils.Xmlns;
 import de.thedevstack.conversationsplus.xml.Element;
 import de.thedevstack.conversationsplus.xmpp.OnIqPacketReceived;
@@ -35,16 +42,19 @@ public class HttpUploadConnection implements Transferable {
 	private XmppConnectionService mXmppConnectionService;
 
 	private boolean canceled = false;
+	private boolean delayed = false;
 	private Account account;
 	private DownloadableFile file;
 	private Message message;
+	private String mime;
 	private URL mGetUrl;
 	private URL mPutUrl;
 
 	private byte[] key = null;
 
 	private long transmitted = 0;
-	private long expected = 1;
+
+	private InputStream mFileInputStream;
 
 	public HttpUploadConnection(HttpConnectionManager httpConnectionManager) {
 		this.mHttpConnectionManager = httpConnectionManager;
@@ -63,12 +73,15 @@ public class HttpUploadConnection implements Transferable {
 
 	@Override
 	public long getFileSize() {
-		return this.file.getExpectedSize();
+		return file == null ? 0 : file.getExpectedSize();
 	}
 
 	@Override
 	public int getProgress() {
-		return (int) ((((double) transmitted) / expected) * 100);
+		if (file == null) {
+			return 0;
+		}
+		return (int) ((((double) transmitted) / file.getExpectedSize()) * 100);
 	}
 
 	@Override
@@ -79,25 +92,34 @@ public class HttpUploadConnection implements Transferable {
 	private void fail() {
 		mHttpConnectionManager.finishUploadConnection(this);
 		message.setTransferable(null);
-		mXmppConnectionService.markMessage(message,Message.STATUS_SEND_FAILED);
+		mXmppConnectionService.markMessage(message, Message.STATUS_SEND_FAILED);
+		StreamUtil.close(mFileInputStream);
 	}
 
-	public void init(Message message) {
+	public void init(Message message, boolean delay) {
 		this.message = message;
-		message.setTransferable(this);
-		mXmppConnectionService.markMessage(message,Message.STATUS_UNSEND);
 		this.account = message.getConversation().getAccount();
 		this.file = FileBackend.getFile(message, false);
-		this.file.setExpectedSize(this.file.getSize());
-
-		if (Config.ENCRYPT_ON_HTTP_UPLOADED) {
+		this.mime = this.file.getMimeType();
+		this.delayed = delay;
+		if (Config.ENCRYPT_ON_HTTP_UPLOADED
+				|| message.getEncryption() == Message.ENCRYPTION_AXOLOTL
+				|| message.getEncryption() == Message.ENCRYPTION_OTR) {
 			this.key = new byte[48];
 			mXmppConnectionService.getRNG().nextBytes(this.key);
-			this.file.setKey(this.key);
+			this.file.setKeyAndIv(this.key);
 		}
-
+		Pair<InputStream,Integer> pair;
+		try {
+			pair = AbstractConnectionManager.createInputStream(file, true);
+		} catch (FileNotFoundException e) {
+			fail();
+			return;
+		}
+		this.file.setExpectedSize(pair.second);
+		this.mFileInputStream = pair.first;
 		Jid host = account.getXmppConnection().findDiscoItemByFeature(Xmlns.HTTP_UPLOAD);
-		IqPacket request = mXmppConnectionService.getIqGenerator().requestHttpUploadSlot(host,file);
+		IqPacket request = mXmppConnectionService.getIqGenerator().requestHttpUploadSlot(host,file,mime);
 		mXmppConnectionService.sendIqPacket(account, request, new OnIqPacketReceived() {
 			@Override
 			public void onIqPacketReceived(Account account, IqPacket packet) {
@@ -121,6 +143,8 @@ public class HttpUploadConnection implements Transferable {
 				}
 			}
 		});
+		message.setTransferable(this);
+		mXmppConnectionService.markMessage(message, Message.STATUS_UNSEND);
 	}
 
 	private class FileUploader implements Runnable {
@@ -132,47 +156,51 @@ public class HttpUploadConnection implements Transferable {
 
 		private void upload() {
 			OutputStream os = null;
-			InputStream is = null;
 			HttpURLConnection connection = null;
+			PowerManager.WakeLock wakeLock = mHttpConnectionManager.createWakeLock("http_upload_"+message.getUuid());
 			try {
+				wakeLock.acquire();
 				Logging.d(Config.LOGTAG, "uploading to " + mPutUrl.toString());
 				connection = (HttpURLConnection) mPutUrl.openConnection();
-				if (connection instanceof HttpsURLConnection) {
+
+                if (connection instanceof HttpsURLConnection) {
 					mHttpConnectionManager.setupTrustManager((HttpsURLConnection) connection, true);
 				}
 				connection.setRequestMethod("PUT");
 				connection.setFixedLengthStreamingMode((int) file.getExpectedSize());
+				connection.setRequestProperty("Content-Type", mime == null ? "application/octet-stream" : mime);
+				connection.setRequestProperty("User-Agent", ConversationsPlusApplication.getNameAndVersion());
 				connection.setDoOutput(true);
 				connection.connect();
 				os = connection.getOutputStream();
-				is = file.createInputStream();
 				transmitted = 0;
-				expected = file.getExpectedSize();
 				int count = -1;
 				byte[] buffer = new byte[4096];
-				while (((count = is.read(buffer)) != -1) && !canceled) {
+				while (((count = mFileInputStream.read(buffer)) != -1) && !canceled) {
 					transmitted += count;
 					os.write(buffer, 0, count);
 					mXmppConnectionService.updateConversationUi();
 				}
 				os.flush();
 				os.close();
-				is.close();
+				mFileInputStream.close();
 				int code = connection.getResponseCode();
 				if (code == 200 || code == 201) {
 					Logging.d(Config.LOGTAG, "finished uploading file");
-					Message.FileParams params = message.getFileParams();
 					if (key != null) {
 						mGetUrl = new URL(mGetUrl.toString() + "#" + CryptoHelper.bytesToHex(key));
 					}
 					MessageUtil.updateFileParams(message, mGetUrl);
+					Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
+					intent.setData(Uri.fromFile(file));
+					mXmppConnectionService.sendBroadcast(intent);
 					message.setTransferable(null);
 					message.setCounterpart(message.getConversation().getJid().toBareJid());
 					if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 						mXmppConnectionService.getPgpEngine().encrypt(message, new UiCallback<Message>() {
 							@Override
 							public void success(Message message) {
-								mXmppConnectionService.resendMessage(message);
+								mXmppConnectionService.resendMessage(message,delayed);
 							}
 
 							@Override
@@ -186,7 +214,7 @@ public class HttpUploadConnection implements Transferable {
 							}
 						});
 					} else {
-						mXmppConnectionService.resendMessage(message);
+						mXmppConnectionService.resendMessage(message, delayed);
 					}
 				} else {
 					fail();
@@ -195,11 +223,11 @@ public class HttpUploadConnection implements Transferable {
 				Logging.d(Config.LOGTAG, e.getMessage());
 				fail();
 			} finally {
-				StreamUtil.close(is);
 				StreamUtil.close(os);
 				if (connection != null) {
 					connection.disconnect();
 				}
+				wakeLock.release();
 			}
 		}
 	}
diff --git a/src/main/java/de/thedevstack/conversationsplus/parser/AbstractParser.java b/src/main/java/de/thedevstack/conversationsplus/parser/AbstractParser.java
index 1b520bbe..bebe41d0 100644
--- a/src/main/java/de/thedevstack/conversationsplus/parser/AbstractParser.java
+++ b/src/main/java/de/thedevstack/conversationsplus/parser/AbstractParser.java
@@ -10,6 +10,7 @@ import de.thedevstack.conversationsplus.entities.Contact;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
 import de.thedevstack.conversationsplus.xml.Element;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+import de.thedevstack.conversationsplus.xmpp.stanzas.AbstractStanza;
 
 public abstract class AbstractParser {
 
@@ -70,16 +71,13 @@ public abstract class AbstractParser {
         return dateFormat.parse(timestamp);
 	}
 
-	protected void updateLastseen(final Element packet, final Account account,
-			final boolean presenceOverwrite) {
-		final Jid from = packet.getAttributeAsJid("from");
-        updateLastseen(packet, account, from, presenceOverwrite);
-    }
+	protected void updateLastseen(final AbstractStanza packet, final Account account, final boolean presenceOverwrite) {
+		updateLastseen(getTimestamp(packet), account, packet.getFrom(), presenceOverwrite);
+	}
 
-	protected void updateLastseen(final Element packet, final Account account, final Jid from, final boolean presenceOverwrite) {
+	protected void updateLastseen(long timestamp, final Account account, final Jid from, final boolean presenceOverwrite) {
 		final String presence = from == null || from.isBareJid() ? "" : from.getResourcepart();
 		final Contact contact = account.getRoster().getContact(from);
-		final long timestamp = getTimestamp(packet);
 		if (timestamp >= contact.lastseen.time) {
 			contact.lastseen.time = timestamp;
 			if (!presence.isEmpty() && presenceOverwrite) {
@@ -87,4 +85,12 @@ public abstract class AbstractParser {
 			}
 		}
 	}
+
+	protected String avatarData(Element items) {
+		Element item = items.findChild("item");
+		if (item == null) {
+			return null;
+		}
+		return item.findChildContent("data", "urn:xmpp:avatar:data");
+	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/parser/IqParser.java b/src/main/java/de/thedevstack/conversationsplus/parser/IqParser.java
index f7f56f79..e13936c5 100644
--- a/src/main/java/de/thedevstack/conversationsplus/parser/IqParser.java
+++ b/src/main/java/de/thedevstack/conversationsplus/parser/IqParser.java
@@ -1,10 +1,30 @@
 package de.thedevstack.conversationsplus.parser;
 
+import android.support.annotation.NonNull;
+import android.util.Base64;
+import android.util.Log;
+import android.util.Pair;
+
+import org.whispersystems.libaxolotl.IdentityKey;
+import org.whispersystems.libaxolotl.ecc.Curve;
+import org.whispersystems.libaxolotl.ecc.ECPublicKey;
+import org.whispersystems.libaxolotl.state.PreKeyBundle;
+
+import java.io.ByteArrayInputStream;
+import java.security.cert.CertificateException;
+import java.security.cert.CertificateFactory;
+import java.security.cert.X509Certificate;
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
 
 import de.thedevstack.android.logcat.Logging;
 import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.crypto.axolotl.AxolotlService;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Contact;
 import de.thedevstack.conversationsplus.services.AvatarService;
@@ -58,9 +78,201 @@ public class IqParser extends AbstractParser implements OnIqPacketReceived {
 		mXmppConnectionService.updateRosterUi();
 	}
 
+	public String avatarData(final IqPacket packet) {
+		final Element pubsub = packet.findChild("pubsub",
+				"http://jabber.org/protocol/pubsub");
+		if (pubsub == null) {
+			return null;
+		}
+		final Element items = pubsub.findChild("items");
+		if (items == null) {
+			return null;
+		}
+		return super.avatarData(items);
+	}
+
+	public Element getItem(final IqPacket packet) {
+		final Element pubsub = packet.findChild("pubsub",
+				"http://jabber.org/protocol/pubsub");
+		if (pubsub == null) {
+			return null;
+		}
+		final Element items = pubsub.findChild("items");
+		if (items == null) {
+			return null;
+		}
+		return items.findChild("item");
+	}
+
+	@NonNull
+	public Set<Integer> deviceIds(final Element item) {
+		Set<Integer> deviceIds = new HashSet<>();
+		if (item != null) {
+			final Element list = item.findChild("list");
+			if (list != null) {
+				for (Element device : list.getChildren()) {
+					if (!device.getName().equals("device")) {
+						continue;
+					}
+					try {
+						Integer id = Integer.valueOf(device.getAttribute("id"));
+						deviceIds.add(id);
+					} catch (NumberFormatException e) {
+						Log.e(Config.LOGTAG, AxolotlService.LOGPREFIX+" : "+"Encountered invalid <device> node in PEP ("+e.getMessage()+"):" + device.toString()+ ", skipping...");
+						continue;
+					}
+				}
+			}
+		}
+		return deviceIds;
+	}
+
+	public Integer signedPreKeyId(final Element bundle) {
+		final Element signedPreKeyPublic = bundle.findChild("signedPreKeyPublic");
+		if(signedPreKeyPublic == null) {
+			return null;
+		}
+		return Integer.valueOf(signedPreKeyPublic.getAttribute("signedPreKeyId"));
+	}
+
+	public ECPublicKey signedPreKeyPublic(final Element bundle) {
+		ECPublicKey publicKey = null;
+		final Element signedPreKeyPublic = bundle.findChild("signedPreKeyPublic");
+		if(signedPreKeyPublic == null) {
+			return null;
+		}
+		try {
+			publicKey = Curve.decodePoint(Base64.decode(signedPreKeyPublic.getContent(),Base64.DEFAULT), 0);
+		} catch (Throwable e) {
+			Log.e(Config.LOGTAG, AxolotlService.LOGPREFIX+" : "+"Invalid signedPreKeyPublic in PEP: " + e.getMessage());
+		}
+		return publicKey;
+	}
+
+	public byte[] signedPreKeySignature(final Element bundle) {
+		final Element signedPreKeySignature = bundle.findChild("signedPreKeySignature");
+		if(signedPreKeySignature == null) {
+			return null;
+		}
+		try {
+			return Base64.decode(signedPreKeySignature.getContent(), Base64.DEFAULT);
+		} catch (Throwable e) {
+			Log.e(Config.LOGTAG, AxolotlService.LOGPREFIX+" : Invalid base64 in signedPreKeySignature");
+			return null;
+		}
+	}
+
+	public IdentityKey identityKey(final Element bundle) {
+		IdentityKey identityKey = null;
+		final Element identityKeyElement = bundle.findChild("identityKey");
+		if(identityKeyElement == null) {
+			return null;
+		}
+		try {
+			identityKey = new IdentityKey(Base64.decode(identityKeyElement.getContent(), Base64.DEFAULT), 0);
+		} catch (Throwable e) {
+			Log.e(Config.LOGTAG, AxolotlService.LOGPREFIX+" : "+"Invalid identityKey in PEP: "+e.getMessage());
+		}
+		return identityKey;
+	}
+
+	public Map<Integer, ECPublicKey> preKeyPublics(final IqPacket packet) {
+		Map<Integer, ECPublicKey> preKeyRecords = new HashMap<>();
+		Element item = getItem(packet);
+		if (item == null) {
+			Log.d(Config.LOGTAG, AxolotlService.LOGPREFIX+" : "+"Couldn't find <item> in bundle IQ packet: " + packet);
+			return null;
+		}
+		final Element bundleElement = item.findChild("bundle");
+		if(bundleElement == null) {
+			return null;
+		}
+		final Element prekeysElement = bundleElement.findChild("prekeys");
+		if(prekeysElement == null) {
+			Log.d(Config.LOGTAG, AxolotlService.LOGPREFIX+" : "+"Couldn't find <prekeys> in bundle IQ packet: " + packet);
+			return null;
+		}
+		for(Element preKeyPublicElement : prekeysElement.getChildren()) {
+			if(!preKeyPublicElement.getName().equals("preKeyPublic")){
+				Log.d(Config.LOGTAG, AxolotlService.LOGPREFIX+" : "+"Encountered unexpected tag in prekeys list: " + preKeyPublicElement);
+				continue;
+			}
+			Integer preKeyId = Integer.valueOf(preKeyPublicElement.getAttribute("preKeyId"));
+			try {
+				ECPublicKey preKeyPublic = Curve.decodePoint(Base64.decode(preKeyPublicElement.getContent(), Base64.DEFAULT), 0);
+				preKeyRecords.put(preKeyId, preKeyPublic);
+			} catch (Throwable e) {
+				Log.e(Config.LOGTAG, AxolotlService.LOGPREFIX+" : "+"Invalid preKeyPublic (ID="+preKeyId+") in PEP: "+ e.getMessage()+", skipping...");
+				continue;
+			}
+		}
+		return preKeyRecords;
+	}
+
+	public Pair<X509Certificate[],byte[]> verification(final IqPacket packet) {
+		Element item = getItem(packet);
+		Element verification = item != null ? item.findChild("verification", AxolotlService.PEP_PREFIX) : null;
+		Element chain = verification != null ? verification.findChild("chain") : null;
+		Element signature = verification != null ? verification.findChild("signature") : null;
+		if (chain != null && signature != null) {
+			List<Element> certElements = chain.getChildren();
+			X509Certificate[] certificates = new X509Certificate[certElements.size()];
+			try {
+				CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");
+				int i = 0;
+				for(Element cert : certElements) {
+					certificates[i] = (X509Certificate) certificateFactory.generateCertificate(new ByteArrayInputStream(Base64.decode(cert.getContent(),Base64.DEFAULT)));
+					++i;
+				}
+				return new Pair<>(certificates,Base64.decode(signature.getContent(),Base64.DEFAULT));
+			} catch (CertificateException e) {
+				return null;
+			}
+		} else {
+			return null;
+		}
+	}
+
+	public PreKeyBundle bundle(final IqPacket bundle) {
+		Element bundleItem = getItem(bundle);
+		if(bundleItem == null) {
+			return null;
+		}
+		final Element bundleElement = bundleItem.findChild("bundle");
+		if(bundleElement == null) {
+			return null;
+		}
+		ECPublicKey signedPreKeyPublic = signedPreKeyPublic(bundleElement);
+		Integer signedPreKeyId = signedPreKeyId(bundleElement);
+		byte[] signedPreKeySignature = signedPreKeySignature(bundleElement);
+		IdentityKey identityKey = identityKey(bundleElement);
+		if(signedPreKeyPublic == null || identityKey == null) {
+			return null;
+		}
+
+		return new PreKeyBundle(0, 0, 0, null,
+				signedPreKeyId, signedPreKeyPublic, signedPreKeySignature, identityKey);
+	}
+
+	public List<PreKeyBundle> preKeys(final IqPacket preKeys) {
+		List<PreKeyBundle> bundles = new ArrayList<>();
+		Map<Integer, ECPublicKey> preKeyPublics = preKeyPublics(preKeys);
+		if ( preKeyPublics != null) {
+			for (Integer preKeyId : preKeyPublics.keySet()) {
+				ECPublicKey preKeyPublic = preKeyPublics.get(preKeyId);
+				bundles.add(new PreKeyBundle(0, 0, preKeyId, preKeyPublic,
+						0, null, null, null));
+			}
+		}
+
+		return bundles;
+	}
+
 	@Override
 	public void onIqPacketReceived(final Account account, final IqPacket packet) {
-		if (packet.hasChild("query", Xmlns.ROSTER) && packet.fromServer(account)) {
+		if (packet.getType() == IqPacket.TYPE.ERROR || packet.getType() == IqPacket.TYPE.TIMEOUT) {
+			return;
+		} else if (packet.hasChild("query", Xmlns.ROSTER) && packet.fromServer(account)) {
 			final Element query = packet.findChild("query");
 			// If this is in response to a query for the whole roster:
 			if (packet.getType() == IqPacket.TYPE.RESULT) {
@@ -130,15 +342,13 @@ public class IqParser extends AbstractParser implements OnIqPacketReceived {
 			final IqPacket response = packet.generateResponse(IqPacket.TYPE.RESULT);
 			mXmppConnectionService.sendIqPacket(account, response, null);
 		} else {
-			if ((packet.getType() == IqPacket.TYPE.GET)
-					|| (packet.getType() == IqPacket.TYPE.SET)) {
+			if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
 				final IqPacket response = packet.generateResponse(IqPacket.TYPE.ERROR);
 				final Element error = response.addChild("error");
 				error.setAttribute("type", "cancel");
-				error.addChild("feature-not-implemented",
-						"urn:ietf:params:xml:ns:xmpp-stanzas");
+				error.addChild("feature-not-implemented","urn:ietf:params:xml:ns:xmpp-stanzas");
 				account.getXmppConnection().sendIqPacket(response, null);
-					}
+			}
 		}
 	}
 
diff --git a/src/main/java/de/thedevstack/conversationsplus/parser/MessageParser.java b/src/main/java/de/thedevstack/conversationsplus/parser/MessageParser.java
index 8c7d8efd..fd89ad00 100644
--- a/src/main/java/de/thedevstack/conversationsplus/parser/MessageParser.java
+++ b/src/main/java/de/thedevstack/conversationsplus/parser/MessageParser.java
@@ -1,14 +1,25 @@
 package de.thedevstack.conversationsplus.parser;
 
+import android.util.Log;
 import android.util.Pair;
 
+import de.tzur.conversations.Settings;
+
 import net.java.otr4j.session.Session;
 import net.java.otr4j.session.SessionStatus;
 
+import java.util.ArrayList;
+import java.util.Set;
+
 import de.thedevstack.android.logcat.Logging;
 import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
+import de.thedevstack.conversationsplus.utils.AvatarUtil;
 import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.crypto.axolotl.AxolotlService;
+import de.thedevstack.conversationsplus.crypto.axolotl.AxolotlServiceImpl;
+import de.thedevstack.conversationsplus.crypto.axolotl.XmppAxolotlMessage;
 import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Bookmark;
 import de.thedevstack.conversationsplus.entities.Contact;
 import de.thedevstack.conversationsplus.entities.Conversation;
 import de.thedevstack.conversationsplus.entities.Message;
@@ -17,7 +28,6 @@ import de.thedevstack.conversationsplus.http.HttpConnectionManager;
 import de.thedevstack.conversationsplus.services.AvatarService;
 import de.thedevstack.conversationsplus.services.MessageArchiveService;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
-import de.thedevstack.conversationsplus.utils.AvatarUtil;
 import de.thedevstack.conversationsplus.utils.CryptoHelper;
 import de.thedevstack.conversationsplus.xml.Element;
 import de.thedevstack.conversationsplus.xmpp.OnMessagePacketReceived;
@@ -39,6 +49,10 @@ public class MessageParser extends AbstractParser implements
 			Jid from = packet.getFrom();
 			if (from.toBareJid().equals(account.getJid().toBareJid())) {
 				conversation.setOutgoingChatState(state);
+				if (state == ChatState.ACTIVE || state == ChatState.COMPOSING) {
+					mXmppConnectionService.markRead(conversation);
+					account.activateGracePeriod();
+				}
 				return false;
 			} else {
 				return conversation.setIncomingChatState(state);
@@ -72,11 +86,9 @@ public class MessageParser extends AbstractParser implements
 			body = otrSession.transformReceiving(body);
 			SessionStatus status = otrSession.getSessionStatus();
 			if (body == null && status == SessionStatus.ENCRYPTED) {
-				conversation.setNextEncryption(Message.ENCRYPTION_OTR);
 				mXmppConnectionService.onOtrSessionEstablished(conversation);
 				return null;
 			} else if (body == null && status == SessionStatus.FINISHED) {
-				conversation.setNextEncryption(Message.ENCRYPTION_NONE);
 				conversation.resetOtrSession();
 				mXmppConnectionService.updateConversationUi();
 				return null;
@@ -97,6 +109,20 @@ public class MessageParser extends AbstractParser implements
 		}
 	}
 
+	private Message parseAxolotlChat(Element axolotlMessage, Jid from, String id, Conversation conversation, int status) {
+		Message finishedMessage = null;
+		AxolotlService service = conversation.getAccount().getAxolotlService();
+		XmppAxolotlMessage xmppAxolotlMessage = XmppAxolotlMessage.fromElement(axolotlMessage, from.toBareJid());
+		XmppAxolotlMessage.XmppAxolotlPlaintextMessage plaintextMessage = service.processReceivingPayloadMessage(xmppAxolotlMessage);
+		if(plaintextMessage != null) {
+			finishedMessage = new Message(conversation, plaintextMessage.getPlaintext(), Message.ENCRYPTION_AXOLOTL, status);
+			finishedMessage.setAxolotlFingerprint(plaintextMessage.getFingerprint());
+			Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(finishedMessage.getConversation().getAccount())+" Received Message with session fingerprint: "+plaintextMessage.getFingerprint());
+		}
+
+		return finishedMessage;
+	}
+
 	private class Invite {
 		Jid jid;
 		String password;
@@ -137,13 +163,24 @@ public class MessageParser extends AbstractParser implements
 		return null;
 	}
 
+	private static String extractStanzaId(Element packet, Jid by) {
+		for(Element child : packet.getChildren()) {
+			if (child.getName().equals("stanza-id")
+					&& "urn:xmpp:sid:0".equals(child.getNamespace())
+					&& by.equals(child.getAttributeAsJid("by"))) {
+				return child.getAttribute("id");
+			}
+		}
+		return null;
+	}
+
 	private void parseEvent(final Element event, final Jid from, final Account account) {
 		Element items = event.findChild("items");
 		String node = items == null ? null : items.getAttribute("node");
 		if ("urn:xmpp:avatar:metadata".equals(node)) {
 			Avatar avatar = Avatar.parseMetadata(items);
 			if (avatar != null) {
-				avatar.owner = from;
+				avatar.owner = from.toBareJid();
 				if (AvatarUtil.isAvatarCached(avatar)) {
 					if (account.getJid().toBareJid().equals(from)) {
 						if (account.setAvatar(avatar.getFilename())) {
@@ -166,13 +203,20 @@ public class MessageParser extends AbstractParser implements
 		} else if ("http://jabber.org/protocol/nick".equals(node)) {
 			Element i = items.findChild("item");
 			Element nick = i == null ? null : i.findChild("nick", "http://jabber.org/protocol/nick");
-			if (nick != null) {
+			if (nick != null && nick.getContent() != null) {
 				Contact contact = account.getRoster().getContact(from);
 				contact.setPresenceName(nick.getContent());
 				AvatarService.getInstance().clear(account);
 				mXmppConnectionService.updateConversationUi();
 				mXmppConnectionService.updateAccountUi();
 			}
+		} else if (ConversationsPlusPreferences.omemoEnabled() && AxolotlService.PEP_DEVICE_LIST.equals(node)) {
+			Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account)+"Received PEP device list update from "+ from + ", processing...");
+			Element item = items.findChild("item");
+			Set<Integer> deviceIds = mXmppConnectionService.getIqParser().deviceIds(item);
+			AxolotlService axolotlService = account.getAxolotlService();
+			axolotlService.registerDevices(from, deviceIds);
+			mXmppConnectionService.updateAccountUi();
 		}
 	}
 
@@ -180,6 +224,13 @@ public class MessageParser extends AbstractParser implements
 		if (packet.getType() == MessagePacket.TYPE_ERROR) {
 			Jid from = packet.getFrom();
 			if (from != null) {
+				Element error = packet.findChild("error");
+				String text = error == null ? null : error.findChildContent("text");
+				if (text != null) {
+					Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": sending message to "+ from+ " failed - " + text);
+				} else if (error != null) {
+					Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": sending message to "+ from+ " failed - " + error);
+				}
 				Message message = mXmppConnectionService.markMessage(account,
 						from.toBareJid(),
 						packet.getId(),
@@ -201,6 +252,7 @@ public class MessageParser extends AbstractParser implements
 		final MessagePacket packet;
 		Long timestamp = null;
 		final boolean isForwarded;
+		boolean isCarbon = false;
 		String serverMsgId = null;
 		final Element fin = original.findChild("fin", "urn:xmpp:mam:0");
 		if (fin != null) {
@@ -218,7 +270,7 @@ public class MessageParser extends AbstractParser implements
 			packet = f.first;
 			isForwarded = true;
 			serverMsgId = result.getAttribute("id");
-			query.incrementTotalCount();
+			query.incrementMessageCount();
 		} else if (query != null) {
 			Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": received mam result from invalid sender");
 			return;
@@ -231,7 +283,8 @@ public class MessageParser extends AbstractParser implements
 				return;
 			}
 			timestamp = f != null ? f.second : null;
-			isForwarded = f != null;
+			isCarbon = f != null;
+			isForwarded = isCarbon;
 		} else {
 			packet = original;
 			isForwarded = false;
@@ -241,25 +294,26 @@ public class MessageParser extends AbstractParser implements
 			timestamp = AbstractParser.getTimestamp(packet, System.currentTimeMillis());
 		}
 		final String body = packet.getBody();
-		final String encrypted = packet.findChildContent("x", "jabber:x:encrypted");
-		final Element mucUserElement = packet.findChild("x","http://jabber.org/protocol/muc#user");
+		final Element mucUserElement = packet.findChild("x", "http://jabber.org/protocol/muc#user");
+		final String pgpEncrypted = packet.findChildContent("x", "jabber:x:encrypted");
+		final Element axolotlEncrypted = packet.findChild(XmppAxolotlMessage.CONTAINERTAG, AxolotlService.PEP_PREFIX);
 		int status;
 		final Jid counterpart;
 		final Jid to = packet.getTo();
 		final Jid from = packet.getFrom();
 		final String remoteMsgId = packet.getId();
 
-		if (from == null || to == null) {
-			Logging.d(Config.LOGTAG,"no to or from in: "+packet.toString());
+		if (from == null) {
+			Log.d(Config.LOGTAG,"no from in: "+packet.toString());
 			return;
 		}
 		
 		boolean isTypeGroupChat = packet.getType() == MessagePacket.TYPE_GROUPCHAT;
-		boolean isProperlyAddressed = !to.isBareJid() || account.countPresences() == 1;
+		boolean isProperlyAddressed = (to != null ) && (!to.isBareJid() || account.countPresences() <= 1);
 		boolean isMucStatusMessage = from.isBareJid() && mucUserElement != null && mucUserElement.hasChild("status");
 		if (packet.fromAccount(account)) {
 			status = Message.STATUS_SEND;
-			counterpart = to;
+			counterpart = to != null ? to : account.getJid();
 		} else {
 			status = Message.STATUS_RECEIVED;
 			counterpart = from;
@@ -270,21 +324,21 @@ public class MessageParser extends AbstractParser implements
 			return;
 		}
 
-		if (extractChatState(mXmppConnectionService.find(account,from), packet)) {
+		if (extractChatState(mXmppConnectionService.find(account, counterpart.toBareJid()), packet)) {
 			mXmppConnectionService.updateConversationUi();
 		}
 
-		if ((body != null || encrypted != null) && !isMucStatusMessage) {
-			Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, counterpart.toBareJid(), isTypeGroupChat);
+		if ((body != null || pgpEncrypted != null || axolotlEncrypted != null) && !isMucStatusMessage) {
+			Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, counterpart.toBareJid(), isTypeGroupChat, query);
 			if (isTypeGroupChat) {
 				if (counterpart.getResourcepart().equals(conversation.getMucOptions().getActualNick())) {
 					status = Message.STATUS_SEND_RECEIVED;
+					isCarbon = true; //not really carbon but received from another resource
 					if (mXmppConnectionService.markMessage(conversation, remoteMsgId, status)) {
 						return;
-					} else {
-						Message message = conversation.findSentMessageWithBody(body);
+					} else if (remoteMsgId == null || Config.IGNORE_ID_REWRITE_IN_MUC) {
+						Message message = conversation.findSentMessageWithBody(packet.getBody());
 						if (message != null) {
-							message.setRemoteMsgId(remoteMsgId);
 							mXmppConnectionService.markMessage(message, status);
 							return;
 						}
@@ -294,69 +348,85 @@ public class MessageParser extends AbstractParser implements
 				}
 			}
 			Message message;
-			if (body != null && body.startsWith("?OTR")) {
+			if (body != null && body.startsWith("?OTR") && Config.supportOtr()) {
 				if (!isForwarded && !isTypeGroupChat && isProperlyAddressed) {
 					message = parseOtrChat(body, from, remoteMsgId, conversation);
 					if (message == null) {
 						return;
 					}
 				} else {
+					Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": ignoring OTR message from "+from+" isForwarded="+Boolean.toString(isForwarded)+", isProperlyAddressed="+Boolean.valueOf(isProperlyAddressed));
 					message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
 				}
-			} else if (encrypted != null) {
-				message = new Message(conversation, encrypted, Message.ENCRYPTION_PGP, status);
+			} else if (pgpEncrypted != null && Config.supportOpenPgp()) {
+				message = new Message(conversation, pgpEncrypted, Message.ENCRYPTION_PGP, status);
+			} else if (axolotlEncrypted != null && Config.supportOmemo()) {
+				message = parseAxolotlChat(axolotlEncrypted, from, remoteMsgId, conversation, status);
+				if (message == null) {
+					return;
+				}
 			} else {
 				message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
 			}
+
+			if (serverMsgId == null) {
+				serverMsgId = extractStanzaId(packet, isTypeGroupChat ? conversation.getJid().toBareJid() : account.getServer());
+			}
+
 			message.setCounterpart(counterpart);
 			message.setRemoteMsgId(remoteMsgId);
 			message.setServerMsgId(serverMsgId);
+			message.setCarbon(isCarbon);
 			message.setTime(timestamp);
 			message.markable = packet.hasChild("markable", "urn:xmpp:chat-markers:0");
 			if (conversation.getMode() == Conversation.MODE_MULTI) {
-				message.setTrueCounterpart(conversation.getMucOptions().getTrueCounterpart(counterpart.getResourcepart()));
+				Jid trueCounterpart = conversation.getMucOptions().getTrueCounterpart(counterpart.getResourcepart());
+				message.setTrueCounterpart(trueCounterpart);
+				if (trueCounterpart != null) {
+					updateLastseen(timestamp, account, trueCounterpart, false);
+				}
 				if (!isTypeGroupChat) {
 					message.setType(Message.TYPE_PRIVATE);
 				}
+			} else {
+				updateLastseen(timestamp, account, packet.getFrom(), true);
 			}
-			updateLastseen(packet,account,true);
-			boolean checkForDuplicates = serverMsgId != null
+
+			boolean checkForDuplicates = query != null
 					|| (isTypeGroupChat && packet.hasChild("delay","urn:xmpp:delay"))
 					|| message.getType() == Message.TYPE_PRIVATE;
 			if (checkForDuplicates && conversation.hasDuplicateMessage(message)) {
-				Logging.d(Config.LOGTAG,"skipping duplicate message from "+message.getCounterpart().toString()+" "+message.getBody());
+				Log.d(Config.LOGTAG,"skipping duplicate message from "+message.getCounterpart().toString()+" "+message.getBody());
 				return;
 			}
-			if (query != null) {
-				query.incrementMessageCount();
+
+			if (query != null && query.getPagingOrder() == MessageArchiveService.PagingOrder.REVERSE) {
+				conversation.prepend(message);
+			} else {
+				conversation.add(message);
 			}
-			conversation.add(message);
-			if (serverMsgId == null) {
+
+			if (message.getEncryption() == Message.ENCRYPTION_PGP) {
+				conversation.getAccount().getPgpDecryptionService().add(message);
+			}
+
+			if (query == null || query.getWith() == null) { //either no mam or catchup
 				if (status == Message.STATUS_SEND || status == Message.STATUS_SEND_RECEIVED) {
 					mXmppConnectionService.markRead(conversation);
-					account.activateGracePeriod();
+					if (query == null) {
+						account.activateGracePeriod();
+					}
 				} else {
 					message.markUnread();
 				}
-				mXmppConnectionService.updateConversationUi();
 			}
 
-			if (ConversationsPlusPreferences.confirmMessages() && remoteMsgId != null && !isForwarded) {
-				if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
-					MessagePacket receipt = mXmppConnectionService
-							.getMessageGenerator().received(account, packet, "urn:xmpp:chat-markers:0");
-					mXmppConnectionService.sendMessagePacket(account, receipt);
-				}
-				if (packet.hasChild("request", "urn:xmpp:receipts")) {
-					MessagePacket receipt = mXmppConnectionService
-							.getMessageGenerator().received(account, packet, "urn:xmpp:receipts");
-					mXmppConnectionService.sendMessagePacket(account, receipt);
-				}
+			if (query == null) {
+				mXmppConnectionService.updateConversationUi();
 			}
-			if (account.getXmppConnection() != null && account.getXmppConnection().getFeatures().advancedStreamFeaturesLoaded()) {
-				if (conversation.setLastMessageTransmitted(System.currentTimeMillis())) {
-					mXmppConnectionService.updateConversation(conversation);
-				}
+
+			if (Settings.CONFIRM_MESSAGE_READ && remoteMsgId != null && !isForwarded && !isTypeGroupChat) {
+				sendMessageReceipts(account, packet);
 			}
 
 			if (message.getStatus() == Message.STATUS_RECEIVED
@@ -377,15 +447,26 @@ public class MessageParser extends AbstractParser implements
                     && mXmppConnectionService.isDownloadAllowedInConnection()) {
 				manager.createNewDownloadConnection(message);
 			} else {
-				mXmppConnectionService.getNotificationService().push(message);
+				if (query == null) {
+					mXmppConnectionService.getNotificationService().push(message);
+				} else if (query.getWith() == null) { // mam catchup
+					mXmppConnectionService.getNotificationService().pushFromBacklog(message);
+				}
 			}
-		} else { //no body
+		} else if (!packet.hasChild("body")){ //no body
 			if (isTypeGroupChat) {
 				Conversation conversation = mXmppConnectionService.find(account, from.toBareJid());
 				if (packet.hasChild("subject")) {
 					if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
 						conversation.setHasMessagesLeftOnServer(conversation.countMessages() > 0);
-						conversation.getMucOptions().setSubject(packet.findChildContent("subject"));
+						String subject = packet.findChildContent("subject");
+						conversation.getMucOptions().setSubject(subject);
+						final Bookmark bookmark = conversation.getBookmark();
+						if (bookmark != null && bookmark.getBookmarkName() == null) {
+							if (bookmark.setBookmarkName(subject)) {
+								mXmppConnectionService.pushBookmarks(account);
+							}
+						}
 						mXmppConnectionService.updateConversationUi();
 						return;
 					}
@@ -417,7 +498,7 @@ public class MessageParser extends AbstractParser implements
 					mXmppConnectionService.markRead(conversation);
 				}
 			} else {
-				updateLastseen(packet, account, true);
+				updateLastseen(timestamp, account, packet.getFrom(), true);
 				final Message displayedMessage = mXmppConnectionService.markMessage(account, from.toBareJid(), displayed.getAttribute("id"), Message.STATUS_SEND_DISPLAYED);
 				Message message = displayedMessage == null ? null : displayedMessage.prev();
 				while (message != null
@@ -440,4 +521,21 @@ public class MessageParser extends AbstractParser implements
 			contact.setPresenceName(nick);
 		}
 	}
+
+	private void sendMessageReceipts(Account account, MessagePacket packet) {
+		ArrayList<String> receiptsNamespaces = new ArrayList<>();
+		if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
+			receiptsNamespaces.add("urn:xmpp:chat-markers:0");
+		}
+		if (packet.hasChild("request", "urn:xmpp:receipts")) {
+			receiptsNamespaces.add("urn:xmpp:receipts");
+		}
+		if (receiptsNamespaces.size() > 0) {
+			MessagePacket receipt = mXmppConnectionService.getMessageGenerator().received(account,
+					packet,
+					receiptsNamespaces,
+					packet.getType());
+			mXmppConnectionService.sendMessagePacket(account, receipt);
+		}
+	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/parser/PresenceParser.java b/src/main/java/de/thedevstack/conversationsplus/parser/PresenceParser.java
index 8bc5ec89..79ffa9bf 100644
--- a/src/main/java/de/thedevstack/conversationsplus/parser/PresenceParser.java
+++ b/src/main/java/de/thedevstack/conversationsplus/parser/PresenceParser.java
@@ -1,18 +1,25 @@
 package de.thedevstack.conversationsplus.parser;
 
+import android.util.Log;
+
 import java.util.ArrayList;
+import java.util.List;
+
+import de.thedevstack.android.logcat.Logging;
+import de.thedevstack.conversationsplus.utils.AvatarUtil;
+import de.thedevstack.conversationsplus.utils.UiUpdateHelper;
 
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.crypto.PgpEngine;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Contact;
 import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.Message;
 import de.thedevstack.conversationsplus.entities.MucOptions;
-import de.thedevstack.conversationsplus.entities.Presences;
+import de.thedevstack.conversationsplus.entities.Presence;
 import de.thedevstack.conversationsplus.generator.PresenceGenerator;
 import de.thedevstack.conversationsplus.services.AvatarService;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
-import de.thedevstack.conversationsplus.utils.AvatarUtil;
-import de.thedevstack.conversationsplus.utils.UiUpdateHelper;
 import de.thedevstack.conversationsplus.xml.Element;
 import de.thedevstack.conversationsplus.xmpp.OnPresencePacketReceived;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
@@ -27,19 +34,19 @@ public class PresenceParser extends AbstractParser implements
 	}
 
 	public void parseConferencePresence(PresencePacket packet, Account account) {
-		PgpEngine mPgpEngine = mXmppConnectionService.getPgpEngine();
 		final Conversation conversation = packet.getFrom() == null ? null : mXmppConnectionService.find(account, packet.getFrom().toBareJid());
 		if (conversation != null) {
 			final MucOptions mucOptions = conversation.getMucOptions();
 			boolean before = mucOptions.online();
-			int count = mucOptions.getUsers().size();
-			final ArrayList<MucOptions.User> tileUserBefore = new ArrayList<>(mucOptions.getUsers().subList(0,Math.min(mucOptions.getUsers().size(),5)));
-			mucOptions.processPacket(packet, mPgpEngine);
-			final ArrayList<MucOptions.User> tileUserAfter = new ArrayList<>(mucOptions.getUsers().subList(0,Math.min(mucOptions.getUsers().size(),5)));
+			int count = mucOptions.getUserCount();
+			final List<MucOptions.User> tileUserBefore = mucOptions.getUsers(5);
+			processConferencePresence(packet, mucOptions);
+			final List<MucOptions.User> tileUserAfter = mucOptions.getUsers(5);
 			if (!tileUserAfter.equals(tileUserBefore)) {
+				Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": update tiles for " + conversation.getName());
 				AvatarService.getInstance().clear(conversation);
 			}
-			if (before != mucOptions.online() || (mucOptions.online() && count != mucOptions.getUsers().size())) {
+			if (before != mucOptions.online() || (mucOptions.online() && count != mucOptions.getUserCount())) {
 				UiUpdateHelper.updateConversationUi();
 			} else if (mucOptions.online()) {
 				UiUpdateHelper.updateMucRosterUi();
@@ -47,8 +54,120 @@ public class PresenceParser extends AbstractParser implements
 		}
 	}
 
-	public void parseContactPresence(PresencePacket packet, Account account) {
-		PresenceGenerator mPresenceGenerator = mXmppConnectionService.getPresenceGenerator();
+	private void processConferencePresence(PresencePacket packet, MucOptions mucOptions) {
+		final Jid from = packet.getFrom();
+		if (!from.isBareJid()) {
+			final String type = packet.getAttribute("type");
+			final Element x = packet.findChild("x", "http://jabber.org/protocol/muc#user");
+			Avatar avatar = Avatar.parsePresence(packet.findChild("x", "vcard-temp:x:update"));
+			final List<String> codes = getStatusCodes(x);
+			if (type == null) {
+				if (x != null) {
+					Element item = x.findChild("item");
+					if (item != null && !from.isBareJid()) {
+						mucOptions.setError(MucOptions.Error.NONE);
+						MucOptions.User user = new MucOptions.User(mucOptions,from);
+						user.setAffiliation(item.getAttribute("affiliation"));
+						user.setRole(item.getAttribute("role"));
+						user.setJid(item.getAttributeAsJid("jid"));
+						if (codes.contains(MucOptions.STATUS_CODE_SELF_PRESENCE) || packet.getFrom().equals(mucOptions.getConversation().getJid())) {
+							mucOptions.setOnline();
+							mucOptions.setSelf(user);
+							if (mucOptions.mNickChangingInProgress) {
+								if (mucOptions.onRenameListener != null) {
+									mucOptions.onRenameListener.onSuccess();
+								}
+								mucOptions.mNickChangingInProgress = false;
+							}
+						} else {
+							mucOptions.addUser(user);
+						}
+						if (mXmppConnectionService.getPgpEngine() != null) {
+							Element signed = packet.findChild("x", "jabber:x:signed");
+							if (signed != null) {
+								Element status = packet.findChild("status");
+								String msg = status == null ? "" : status.getContent();
+								long keyId = mXmppConnectionService.getPgpEngine().fetchKeyId(mucOptions.getAccount(), msg, signed.getContent());
+								if (keyId != 0) {
+									user.setPgpKeyId(keyId);
+								}
+							}
+						}
+						if (avatar != null) {
+							avatar.owner = from;
+							if (AvatarUtil.isAvatarCached(avatar)) {
+								if (user.setAvatar(avatar)) {
+									AvatarService.getInstance().clear(user);
+								}
+							} else {
+								AvatarService.getInstance().fetchAvatar(mucOptions.getAccount(), avatar);
+							}
+						}
+					}
+				}
+			} else if (type.equals("unavailable")) {
+				if (codes.contains(MucOptions.STATUS_CODE_SELF_PRESENCE) ||
+						packet.getFrom().equals(mucOptions.getConversation().getJid())) {
+					if (codes.contains(MucOptions.STATUS_CODE_CHANGED_NICK)) {
+						mucOptions.mNickChangingInProgress = true;
+					} else if (codes.contains(MucOptions.STATUS_CODE_KICKED)) {
+						mucOptions.setError(MucOptions.Error.KICKED);
+					} else if (codes.contains(MucOptions.STATUS_CODE_BANNED)) {
+						mucOptions.setError(MucOptions.Error.BANNED);
+					} else if (codes.contains(MucOptions.STATUS_CODE_LOST_MEMBERSHIP)) {
+						mucOptions.setError(MucOptions.Error.MEMBERS_ONLY);
+					} else if (codes.contains(MucOptions.STATUS_CODE_AFFILIATION_CHANGE)) {
+						mucOptions.setError(MucOptions.Error.MEMBERS_ONLY);
+					} else if (codes.contains(MucOptions.STATUS_CODE_SHUTDOWN)) {
+						mucOptions.setError(MucOptions.Error.SHUTDOWN);
+					} else {
+						mucOptions.setError(MucOptions.Error.UNKNOWN);
+						Log.d(Config.LOGTAG, "unknown error in conference: " + packet);
+					}
+				} else if (!from.isBareJid()){
+					MucOptions.User user = mucOptions.deleteUser(from.getResourcepart());
+					if (user != null) {
+						AvatarService.getInstance().clear(user);
+					}
+				}
+			} else if (type.equals("error")) {
+				Element error = packet.findChild("error");
+				if (error != null && error.hasChild("conflict")) {
+					if (mucOptions.online()) {
+						if (mucOptions.onRenameListener != null) {
+							mucOptions.onRenameListener.onFailure();
+						}
+					} else {
+						mucOptions.setError(MucOptions.Error.NICK_IN_USE);
+					}
+				} else if (error != null && error.hasChild("not-authorized")) {
+					mucOptions.setError(MucOptions.Error.PASSWORD_REQUIRED);
+				} else if (error != null && error.hasChild("forbidden")) {
+					mucOptions.setError(MucOptions.Error.BANNED);
+				} else if (error != null && error.hasChild("registration-required")) {
+					mucOptions.setError(MucOptions.Error.BANNED);
+				}
+			}
+		}
+	}
+
+	private static List<String> getStatusCodes(Element x) {
+		List<String> codes = new ArrayList<>();
+		if (x != null) {
+			for (Element child : x.getChildren()) {
+				if (child.getName().equals("status")) {
+					String code = child.getAttribute("code");
+					if (code != null) {
+						codes.add(code);
+					}
+				}
+			}
+		}
+		return codes;
+	}
+
+	public void parseContactPresence(final PresencePacket packet, final Account account) {
+		final PresenceGenerator mPresenceGenerator = mXmppConnectionService.getPresenceGenerator();
 		final Jid from = packet.getFrom();
 		if (from == null) {
 			return;
@@ -56,7 +175,7 @@ public class PresenceParser extends AbstractParser implements
 		final String type = packet.getAttribute("type");
 		final Contact contact = account.getRoster().getContact(from);
 		if (type == null) {
-			String presence = from.isBareJid() ? "" : from.getResourcepart();
+			final String resource = from.isBareJid() ? "" : from.getResourcepart();
 			contact.setPresenceName(packet.findChildContent("nick", "http://jabber.org/protocol/nick"));
 			Avatar avatar = Avatar.parsePresence(packet.findChild("x", "vcard-temp:x:update"));
 			if (avatar != null && !contact.isSelf()) {
@@ -72,7 +191,15 @@ public class PresenceParser extends AbstractParser implements
 				}
 			}
 			int sizeBefore = contact.getPresences().size();
-			contact.updatePresence(presence, Presences.parseShow(packet.findChild("show")));
+
+			final String show = packet.findChildContent("show");
+			final Element caps = packet.findChild("c", "http://jabber.org/protocol/caps");
+			final Presence presence = Presence.parse(show, caps);
+			contact.updatePresence(resource, presence);
+			if (presence.hasCaps() && Config.REQUEST_DISCO) {
+				mXmppConnectionService.fetchCaps(account, from, presence);
+			}
+
 			PgpEngine pgp = mXmppConnectionService.getPgpEngine();
 			Element x = packet.findChild("x", "jabber:x:signed");
 			if (pgp != null && x != null) {
@@ -96,6 +223,19 @@ public class PresenceParser extends AbstractParser implements
 						mPresenceGenerator.sendPresenceUpdatesTo(contact));
 			} else {
 				contact.setOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST);
+				final Conversation conversation = mXmppConnectionService.findOrCreateConversation(
+						account, contact.getJid().toBareJid(), false);
+				final String statusMessage = packet.findChildContent("status");
+				if (statusMessage != null
+						&& !statusMessage.isEmpty()
+						&& conversation.countMessages() == 0) {
+					conversation.add(new Message(
+							conversation,
+							statusMessage,
+							Message.ENCRYPTION_NONE,
+							Message.STATUS_RECEIVED
+					));
+				}
 			}
 		}
 		UiUpdateHelper.updateRosterUi();
diff --git a/src/main/java/de/thedevstack/conversationsplus/persistance/DatabaseBackend.java b/src/main/java/de/thedevstack/conversationsplus/persistance/DatabaseBackend.java
index 5b09fe2e..52f60e88 100644
--- a/src/main/java/de/thedevstack/conversationsplus/persistance/DatabaseBackend.java
+++ b/src/main/java/de/thedevstack/conversationsplus/persistance/DatabaseBackend.java
@@ -1,31 +1,58 @@
 package de.thedevstack.conversationsplus.persistance;
 
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.database.DatabaseUtils;
+import android.database.sqlite.SQLiteCantOpenDatabaseException;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+import android.util.Base64;
+import android.util.Log;
+import android.util.Pair;
+
+import org.whispersystems.libaxolotl.AxolotlAddress;
+import org.whispersystems.libaxolotl.IdentityKey;
+import org.whispersystems.libaxolotl.IdentityKeyPair;
+import org.whispersystems.libaxolotl.InvalidKeyException;
+import org.whispersystems.libaxolotl.state.PreKeyRecord;
+import org.whispersystems.libaxolotl.state.SessionRecord;
+import org.whispersystems.libaxolotl.state.SignedPreKeyRecord;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.security.cert.CertificateEncodingException;
+import java.security.cert.CertificateException;
+import java.security.cert.CertificateFactory;
+import java.security.cert.X509Certificate;
 import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.Iterator;
 import java.util.List;
+import java.util.Set;
 import java.util.concurrent.CopyOnWriteArrayList;
+import org.json.JSONException;
 
 import de.thedevstack.android.logcat.Logging;
 import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.crypto.axolotl.AxolotlServiceImpl;
+import de.thedevstack.conversationsplus.crypto.axolotl.SQLiteAxolotlStore;
+import de.thedevstack.conversationsplus.crypto.axolotl.XmppAxolotlSession;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Contact;
 import de.thedevstack.conversationsplus.entities.Conversation;
 import de.thedevstack.conversationsplus.entities.Message;
 import de.thedevstack.conversationsplus.entities.Roster;
+import de.thedevstack.conversationsplus.entities.ServiceDiscoveryResult;
 import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 
-import android.content.Context;
-import android.database.Cursor;
-import android.database.sqlite.SQLiteCantOpenDatabaseException;
-import android.database.sqlite.SQLiteDatabase;
-import android.database.sqlite.SQLiteOpenHelper;
-
 public class DatabaseBackend extends SQLiteOpenHelper {
 
 	private static DatabaseBackend instance = null;
 
 	private static final String DATABASE_NAME = "history";
-	private static final int DATABASE_VERSION = 14;
+	private static final int DATABASE_VERSION = 24;
 
 	private static String CREATE_CONTATCS_STATEMENT = "create table "
 			+ Contact.TABLENAME + "(" + Contact.ACCOUNT + " TEXT, "
@@ -33,12 +60,75 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 			+ Contact.JID + " TEXT," + Contact.KEYS + " TEXT,"
 			+ Contact.PHOTOURI + " TEXT," + Contact.OPTIONS + " NUMBER,"
 			+ Contact.SYSTEMACCOUNT + " NUMBER, " + Contact.AVATAR + " TEXT, "
-            + Contact.LAST_PRESENCE + " TEXT, " + Contact.LAST_TIME + " NUMBER, "
+			+ Contact.LAST_PRESENCE + " TEXT, " + Contact.LAST_TIME + " NUMBER, "
 			+ Contact.GROUPS + " TEXT, FOREIGN KEY(" + Contact.ACCOUNT + ") REFERENCES "
 			+ Account.TABLENAME + "(" + Account.UUID
 			+ ") ON DELETE CASCADE, UNIQUE(" + Contact.ACCOUNT + ", "
 			+ Contact.JID + ") ON CONFLICT REPLACE);";
 
+	private static String CREATE_DISCOVERY_RESULTS_STATEMENT = "create table "
+			+ ServiceDiscoveryResult.TABLENAME + "("
+			+ ServiceDiscoveryResult.HASH + " TEXT, "
+			+ ServiceDiscoveryResult.VER + " TEXT, "
+			+ ServiceDiscoveryResult.RESULT + " TEXT, "
+			+ "UNIQUE(" + ServiceDiscoveryResult.HASH + ", "
+			+ ServiceDiscoveryResult.VER + ") ON CONFLICT REPLACE);";
+
+	private static String CREATE_PREKEYS_STATEMENT = "CREATE TABLE "
+			+ SQLiteAxolotlStore.PREKEY_TABLENAME + "("
+			+ SQLiteAxolotlStore.ACCOUNT + " TEXT,  "
+			+ SQLiteAxolotlStore.ID + " INTEGER, "
+			+ SQLiteAxolotlStore.KEY + " TEXT, FOREIGN KEY("
+			+ SQLiteAxolotlStore.ACCOUNT
+			+ ") REFERENCES " + Account.TABLENAME + "(" + Account.UUID + ") ON DELETE CASCADE, "
+			+ "UNIQUE( " + SQLiteAxolotlStore.ACCOUNT + ", "
+			+ SQLiteAxolotlStore.ID
+			+ ") ON CONFLICT REPLACE"
+			+ ");";
+
+	private static String CREATE_SIGNED_PREKEYS_STATEMENT = "CREATE TABLE "
+			+ SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME + "("
+			+ SQLiteAxolotlStore.ACCOUNT + " TEXT,  "
+			+ SQLiteAxolotlStore.ID + " INTEGER, "
+			+ SQLiteAxolotlStore.KEY + " TEXT, FOREIGN KEY("
+			+ SQLiteAxolotlStore.ACCOUNT
+			+ ") REFERENCES " + Account.TABLENAME + "(" + Account.UUID + ") ON DELETE CASCADE, "
+			+ "UNIQUE( " + SQLiteAxolotlStore.ACCOUNT + ", "
+			+ SQLiteAxolotlStore.ID
+			+ ") ON CONFLICT REPLACE" +
+			");";
+
+	private static String CREATE_SESSIONS_STATEMENT = "CREATE TABLE "
+			+ SQLiteAxolotlStore.SESSION_TABLENAME + "("
+			+ SQLiteAxolotlStore.ACCOUNT + " TEXT,  "
+			+ SQLiteAxolotlStore.NAME + " TEXT, "
+			+ SQLiteAxolotlStore.DEVICE_ID + " INTEGER, "
+			+ SQLiteAxolotlStore.KEY + " TEXT, FOREIGN KEY("
+			+ SQLiteAxolotlStore.ACCOUNT
+			+ ") REFERENCES " + Account.TABLENAME + "(" + Account.UUID + ") ON DELETE CASCADE, "
+			+ "UNIQUE( " + SQLiteAxolotlStore.ACCOUNT + ", "
+			+ SQLiteAxolotlStore.NAME + ", "
+			+ SQLiteAxolotlStore.DEVICE_ID
+			+ ") ON CONFLICT REPLACE"
+			+ ");";
+
+	private static String CREATE_IDENTITIES_STATEMENT = "CREATE TABLE "
+			+ SQLiteAxolotlStore.IDENTITIES_TABLENAME + "("
+			+ SQLiteAxolotlStore.ACCOUNT + " TEXT,  "
+			+ SQLiteAxolotlStore.NAME + " TEXT, "
+			+ SQLiteAxolotlStore.OWN + " INTEGER, "
+			+ SQLiteAxolotlStore.FINGERPRINT + " TEXT, "
+			+ SQLiteAxolotlStore.CERTIFICATE + " BLOB, "
+			+ SQLiteAxolotlStore.TRUSTED + " INTEGER, "
+			+ SQLiteAxolotlStore.KEY + " TEXT, FOREIGN KEY("
+			+ SQLiteAxolotlStore.ACCOUNT
+			+ ") REFERENCES " + Account.TABLENAME + "(" + Account.UUID + ") ON DELETE CASCADE, "
+			+ "UNIQUE( " + SQLiteAxolotlStore.ACCOUNT + ", "
+			+ SQLiteAxolotlStore.NAME + ", "
+			+ SQLiteAxolotlStore.FINGERPRINT
+			+ ") ON CONFLICT IGNORE"
+			+ ");";
+
 	private DatabaseBackend(Context context) {
 		super(context, DATABASE_NAME, null, DATABASE_VERSION);
 	}
@@ -49,9 +139,10 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 		db.execSQL("create table " + Account.TABLENAME + "(" + Account.UUID
 				+ " TEXT PRIMARY KEY," + Account.USERNAME + " TEXT,"
 				+ Account.SERVER + " TEXT," + Account.PASSWORD + " TEXT,"
+				+ Account.DISPLAY_NAME + " TEXT, "
 				+ Account.ROSTERVERSION + " TEXT," + Account.OPTIONS
 				+ " NUMBER, " + Account.AVATAR + " TEXT, " + Account.KEYS
-				+ " TEXT)");
+				+ " TEXT, " + Account.HOSTNAME + " TEXT, " + Account.PORT + " NUMBER DEFAULT 5222)");
 		db.execSQL("create table " + Conversation.TABLENAME + " ("
 				+ Conversation.UUID + " TEXT PRIMARY KEY, " + Conversation.NAME
 				+ " TEXT, " + Conversation.CONTACT + " TEXT, "
@@ -69,12 +160,21 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 				+ Message.STATUS + " NUMBER," + Message.TYPE + " NUMBER, "
 				+ Message.RELATIVE_FILE_PATH + " TEXT, "
 				+ Message.SERVER_MSG_ID + " TEXT, "
+				+ Message.FINGERPRINT + " TEXT, "
+				+ Message.CARBON + " INTEGER, "
+				+ Message.EDITED + " TEXT, "
+				+ Message.READ + " NUMBER DEFAULT 1, "
 				+ Message.REMOTE_MSG_ID + " TEXT, FOREIGN KEY("
 				+ Message.CONVERSATION + ") REFERENCES "
 				+ Conversation.TABLENAME + "(" + Conversation.UUID
 				+ ") ON DELETE CASCADE);");
 
 		db.execSQL(CREATE_CONTATCS_STATEMENT);
+		db.execSQL(CREATE_DISCOVERY_RESULTS_STATEMENT);
+		db.execSQL(CREATE_SESSIONS_STATEMENT);
+		db.execSQL(CREATE_PREKEYS_STATEMENT);
+		db.execSQL(CREATE_SIGNED_PREKEYS_STATEMENT);
+		db.execSQL(CREATE_IDENTITIES_STATEMENT);
 	}
 
 	@Override
@@ -109,12 +209,12 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 			db.execSQL("ALTER TABLE " + Conversation.TABLENAME + " ADD COLUMN "
 					+ Conversation.ATTRIBUTES + " TEXT");
 		}
-        if (oldVersion < 9 && newVersion >= 9) {
-            db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN "
-                    + Contact.LAST_TIME + " NUMBER");
-            db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN "
-                    + Contact.LAST_PRESENCE + " TEXT");
-        }
+		if (oldVersion < 9 && newVersion >= 9) {
+			db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN "
+					+ Contact.LAST_TIME + " NUMBER");
+			db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN "
+					+ Contact.LAST_PRESENCE + " TEXT");
+		}
 		if (oldVersion < 10 && newVersion >= 10) {
 			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 					+ Message.RELATIVE_FILE_PATH + " TEXT");
@@ -122,23 +222,23 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 		if (oldVersion < 11 && newVersion >= 11) {
 			db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN "
 					+ Contact.GROUPS + " TEXT");
-			db.execSQL("delete from "+Contact.TABLENAME);
-			db.execSQL("update "+Account.TABLENAME+" set "+Account.ROSTERVERSION+" = NULL");
+			db.execSQL("delete from " + Contact.TABLENAME);
+			db.execSQL("update " + Account.TABLENAME + " set " + Account.ROSTERVERSION + " = NULL");
 		}
 		if (oldVersion < 12 && newVersion >= 12) {
 			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 					+ Message.SERVER_MSG_ID + " TEXT");
 		}
 		if (oldVersion < 13 && newVersion >= 13) {
-			db.execSQL("delete from "+Contact.TABLENAME);
-			db.execSQL("update "+Account.TABLENAME+" set "+Account.ROSTERVERSION+" = NULL");
+			db.execSQL("delete from " + Contact.TABLENAME);
+			db.execSQL("update " + Account.TABLENAME + " set " + Account.ROSTERVERSION + " = NULL");
 		}
 		if (oldVersion < 14 && newVersion >= 14) {
 			// migrate db to new, canonicalized JID domainpart representation
 
 			// Conversation table
 			Cursor cursor = db.rawQuery("select * from " + Conversation.TABLENAME, new String[0]);
-			while(cursor.moveToNext()) {
+			while (cursor.moveToNext()) {
 				String newJid;
 				try {
 					newJid = Jid.fromString(
@@ -146,8 +246,8 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 					).toString();
 				} catch (InvalidJidException ignored) {
 					Logging.e(Config.LOGTAG, "Failed to migrate Conversation CONTACTJID "
-							+cursor.getString(cursor.getColumnIndex(Conversation.CONTACTJID))
-							+": " + ignored +". Skipping...");
+							+ cursor.getString(cursor.getColumnIndex(Conversation.CONTACTJID))
+							+ ": " + ignored + ". Skipping...");
 					continue;
 				}
 
@@ -156,14 +256,14 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 						cursor.getString(cursor.getColumnIndex(Conversation.UUID)),
 				};
 				db.execSQL("update " + Conversation.TABLENAME
-						+ " set " + Conversation.CONTACTJID	+ " = ? "
+						+ " set " + Conversation.CONTACTJID + " = ? "
 						+ " where " + Conversation.UUID + " = ?", updateArgs);
 			}
 			cursor.close();
 
 			// Contact table
 			cursor = db.rawQuery("select * from " + Contact.TABLENAME, new String[0]);
-			while(cursor.moveToNext()) {
+			while (cursor.moveToNext()) {
 				String newJid;
 				try {
 					newJid = Jid.fromString(
@@ -171,8 +271,8 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 					).toString();
 				} catch (InvalidJidException ignored) {
 					Logging.e(Config.LOGTAG, "Failed to migrate Contact JID "
-							+cursor.getString(cursor.getColumnIndex(Contact.JID))
-							+": " + ignored +". Skipping...");
+							+ cursor.getString(cursor.getColumnIndex(Contact.JID))
+							+ ": " + ignored + ". Skipping...");
 					continue;
 				}
 
@@ -190,7 +290,7 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 
 			// Account table
 			cursor = db.rawQuery("select * from " + Account.TABLENAME, new String[0]);
-			while(cursor.moveToNext()) {
+			while (cursor.moveToNext()) {
 				String newServer;
 				try {
 					newServer = Jid.fromParts(
@@ -200,8 +300,8 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 					).getDomainpart();
 				} catch (InvalidJidException ignored) {
 					Logging.e(Config.LOGTAG, "Failed to migrate Account SERVER "
-							+cursor.getString(cursor.getColumnIndex(Account.SERVER))
-							+": " + ignored +". Skipping...");
+							+ cursor.getString(cursor.getColumnIndex(Account.SERVER))
+							+ ": " + ignored + ". Skipping...");
 					continue;
 				}
 
@@ -215,6 +315,67 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 			}
 			cursor.close();
 		}
+		if (oldVersion < 15 && newVersion >= 15) {
+			recreateAxolotlDb(db);
+			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
+					+ Message.FINGERPRINT + " TEXT");
+		}
+		if (oldVersion < 16 && newVersion >= 16) {
+			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
+					+ Message.CARBON + " INTEGER");
+		}
+		if (oldVersion < 19 && newVersion >= 19) {
+			db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.DISPLAY_NAME + " TEXT");
+		}
+		if (oldVersion < 20 && newVersion >= 20) {
+			db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.HOSTNAME + " TEXT");
+			db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.PORT + " NUMBER DEFAULT 5222");
+		}
+		/* Any migrations that alter the Account table need to happen BEFORE this migration, as it
+		 * depends on account de-serialization.
+		 */
+		if (oldVersion < 17 && newVersion >= 17) {
+			List<Account> accounts = getAccounts(db);
+			for (Account account : accounts) {
+				String ownDeviceIdString = account.getKey(SQLiteAxolotlStore.JSONKEY_REGISTRATION_ID);
+				if (ownDeviceIdString == null) {
+					continue;
+				}
+				int ownDeviceId = Integer.valueOf(ownDeviceIdString);
+				AxolotlAddress ownAddress = new AxolotlAddress(account.getJid().toBareJid().toString(), ownDeviceId);
+				deleteSession(db, account, ownAddress);
+				IdentityKeyPair identityKeyPair = loadOwnIdentityKeyPair(db, account);
+				if (identityKeyPair != null) {
+					setIdentityKeyTrust(db, account, identityKeyPair.getPublicKey().getFingerprint().replaceAll("\\s", ""), XmppAxolotlSession.Trust.TRUSTED);
+				} else {
+					Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not load own identity key pair");
+				}
+			}
+		}
+		if (oldVersion < 18 && newVersion >= 18) {
+			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN " + Message.READ + " NUMBER DEFAULT 1");
+		}
+
+		if (oldVersion < 21 && newVersion >= 21) {
+			List<Account> accounts = getAccounts(db);
+			for (Account account : accounts) {
+				account.unsetPgpSignature();
+				db.update(Account.TABLENAME, account.getContentValues(), Account.UUID
+						+ "=?", new String[]{account.getUuid()});
+			}
+		}
+
+		if (oldVersion < 22 && oldVersion >= 15 && newVersion >= 22) {
+			db.execSQL("ALTER TABLE " + SQLiteAxolotlStore.IDENTITIES_TABLENAME + " ADD COLUMN " + SQLiteAxolotlStore.CERTIFICATE);
+		}
+
+		if (oldVersion < 23 && newVersion >= 23) {
+			db.execSQL(CREATE_DISCOVERY_RESULTS_STATEMENT);
+		}
+
+		if (oldVersion < 24 && newVersion >= 24) {
+			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN " + Message.EDITED + " TEXT");
+		}
 	}
 
 	public static synchronized DatabaseBackend getInstance(Context context) {
@@ -239,26 +400,34 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 		db.insert(Account.TABLENAME, null, account.getContentValues());
 	}
 
-	public void createContact(Contact contact) {
+	public void insertDiscoveryResult(ServiceDiscoveryResult result) {
 		SQLiteDatabase db = this.getWritableDatabase();
-		db.insert(Contact.TABLENAME, null, contact.getContentValues());
+		db.insert(ServiceDiscoveryResult.TABLENAME, null, result.getContentValues());
 	}
 
-	public int getConversationCount() {
+	public ServiceDiscoveryResult findDiscoveryResult(final String hash, final String ver) {
 		SQLiteDatabase db = this.getReadableDatabase();
-		Cursor cursor = db.rawQuery("select count(uuid) as count from "
-				+ Conversation.TABLENAME + " where " + Conversation.STATUS
-				+ "=" + Conversation.STATUS_AVAILABLE, null);
+		String[] selectionArgs = {hash, ver};
+		Cursor cursor = db.query(ServiceDiscoveryResult.TABLENAME, null,
+				ServiceDiscoveryResult.HASH + "=? AND " + ServiceDiscoveryResult.VER + "=?",
+				selectionArgs, null, null, null);
+		if (cursor.getCount() == 0)
+			return null;
 		cursor.moveToFirst();
-		int count = cursor.getInt(0);
+
+		ServiceDiscoveryResult result = null;
+		try {
+			result = new ServiceDiscoveryResult(cursor);
+		} catch (JSONException e) { /* result is still null */ }
+
 		cursor.close();
-		return count;
+		return result;
 	}
 
 	public CopyOnWriteArrayList<Conversation> getConversations(int status) {
 		CopyOnWriteArrayList<Conversation> list = new CopyOnWriteArrayList<>();
 		SQLiteDatabase db = this.getReadableDatabase();
-		String[] selectionArgs = { Integer.toString(status) };
+		String[] selectionArgs = {Integer.toString(status)};
 		Cursor cursor = db.rawQuery("select * from " + Conversation.TABLENAME
 				+ " where " + Conversation.STATUS + " = ? order by "
 				+ Conversation.CREATED + " desc", selectionArgs);
@@ -274,20 +443,20 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 	}
 
 	public ArrayList<Message> getMessages(Conversation conversation, int limit,
-			long timestamp) {
+										  long timestamp) {
 		ArrayList<Message> list = new ArrayList<>();
 		SQLiteDatabase db = this.getReadableDatabase();
 		Cursor cursor;
 		if (timestamp == -1) {
-			String[] selectionArgs = { conversation.getUuid() };
+			String[] selectionArgs = {conversation.getUuid()};
 			cursor = db.query(Message.TABLENAME, null, Message.CONVERSATION
 					+ "=?", selectionArgs, null, null, Message.TIME_SENT
 					+ " DESC", String.valueOf(limit));
 		} else {
-			String[] selectionArgs = { conversation.getUuid(),
-					Long.toString(timestamp) };
+			String[] selectionArgs = {conversation.getUuid(),
+					Long.toString(timestamp)};
 			cursor = db.query(Message.TABLENAME, null, Message.CONVERSATION
-					+ "=? and " + Message.TIME_SENT + "<?", selectionArgs,
+							+ "=? and " + Message.TIME_SENT + "<?", selectionArgs,
 					null, null, Message.TIME_SENT + " DESC",
 					String.valueOf(limit));
 		}
@@ -303,15 +472,52 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 		return list;
 	}
 
+	public Iterable<Message> getMessagesIterable(final Conversation conversation) {
+		return new Iterable<Message>() {
+			@Override
+			public Iterator<Message> iterator() {
+				class MessageIterator implements Iterator<Message> {
+					SQLiteDatabase db = getReadableDatabase();
+					String[] selectionArgs = {conversation.getUuid()};
+					Cursor cursor = db.query(Message.TABLENAME, null, Message.CONVERSATION
+							+ "=?", selectionArgs, null, null, Message.TIME_SENT
+							+ " ASC", null);
+
+					public MessageIterator() {
+						cursor.moveToFirst();
+					}
+
+					@Override
+					public boolean hasNext() {
+						return !cursor.isAfterLast();
+					}
+
+					@Override
+					public Message next() {
+						Message message = Message.fromCursor(cursor);
+						cursor.moveToNext();
+						return message;
+					}
+
+					@Override
+					public void remove() {
+						throw new UnsupportedOperationException();
+					}
+				}
+				return new MessageIterator();
+			}
+		};
+	}
+
 	public Conversation findConversation(final Account account, final Jid contactJid) {
 		SQLiteDatabase db = this.getReadableDatabase();
-		String[] selectionArgs = { account.getUuid(),
+		String[] selectionArgs = {account.getUuid(),
 				contactJid.toBareJid().toString() + "/%",
 				contactJid.toBareJid().toString()
-				};
+		};
 		Cursor cursor = db.query(Conversation.TABLENAME, null,
 				Conversation.ACCOUNT + "=? AND (" + Conversation.CONTACTJID
-						+ " like ? OR "+Conversation.CONTACTJID+"=?)", selectionArgs, null, null, null);
+						+ " like ? OR " + Conversation.CONTACTJID + "=?)", selectionArgs, null, null, null);
 		if (cursor.getCount() == 0)
 			return null;
 		cursor.moveToFirst();
@@ -322,14 +528,18 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 
 	public void updateConversation(final Conversation conversation) {
 		final SQLiteDatabase db = this.getWritableDatabase();
-		final String[] args = { conversation.getUuid() };
+		final String[] args = {conversation.getUuid()};
 		db.update(Conversation.TABLENAME, conversation.getContentValues(),
 				Conversation.UUID + "=?", args);
 	}
 
 	public List<Account> getAccounts() {
-		List<Account> list = new ArrayList<>();
 		SQLiteDatabase db = this.getReadableDatabase();
+		return getAccounts(db);
+	}
+
+	private List<Account> getAccounts(SQLiteDatabase db) {
+		List<Account> list = new ArrayList<>();
 		Cursor cursor = db.query(Account.TABLENAME, null, null, null, null,
 				null, null);
 		while (cursor.moveToNext()) {
@@ -341,14 +551,14 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 
 	public void updateAccount(Account account) {
 		SQLiteDatabase db = this.getWritableDatabase();
-		String[] args = { account.getUuid() };
+		String[] args = {account.getUuid()};
 		db.update(Account.TABLENAME, account.getContentValues(), Account.UUID
 				+ "=?", args);
 	}
 
 	public void deleteAccount(Account account) {
 		SQLiteDatabase db = this.getWritableDatabase();
-		String[] args = { account.getUuid() };
+		String[] args = {account.getUuid()};
 		db.delete(Account.TABLENAME, Account.UUID + "=?", args);
 	}
 
@@ -377,7 +587,14 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 
 	public void updateMessage(Message message) {
 		SQLiteDatabase db = this.getWritableDatabase();
-		String[] args = { message.getUuid() };
+		String[] args = {message.getUuid()};
+		db.update(Message.TABLENAME, message.getContentValues(), Message.UUID
+				+ "=?", args);
+	}
+
+	public void updateMessage(Message message, String uuid) {
+		SQLiteDatabase db = this.getWritableDatabase();
+		String[] args = {uuid};
 		db.update(Message.TABLENAME, message.getContentValues(), Message.UUID
 				+ "=?", args);
 	}
@@ -385,7 +602,7 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 	public void readRoster(Roster roster) {
 		SQLiteDatabase db = this.getReadableDatabase();
 		Cursor cursor;
-		String args[] = { roster.getAccount().getUuid() };
+		String args[] = {roster.getAccount().getUuid()};
 		cursor = db.query(Contact.TABLENAME, null, Contact.ACCOUNT + "=?", args, null, null, null);
 		while (cursor.moveToNext()) {
 			roster.initContact(Contact.fromCursor(cursor));
@@ -396,89 +613,517 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 	public void writeRoster(final Roster roster) {
 		final Account account = roster.getAccount();
 		final SQLiteDatabase db = this.getWritableDatabase();
+		db.beginTransaction();
 		for (Contact contact : roster.getContacts()) {
 			if (contact.getOption(Contact.Options.IN_ROSTER)) {
 				db.insert(Contact.TABLENAME, null, contact.getContentValues());
 			} else {
 				String where = Contact.ACCOUNT + "=? AND " + Contact.JID + "=?";
-				String[] whereArgs = { account.getUuid(), contact.getJid().toString() };
+				String[] whereArgs = {account.getUuid(), contact.getJid().toString()};
 				db.delete(Contact.TABLENAME, where, whereArgs);
 			}
 		}
+		db.setTransactionSuccessful();
+		db.endTransaction();
 		account.setRosterVersion(roster.getVersion());
 		updateAccount(account);
 	}
 
-	public void deleteMessage(Message message) {
-		SQLiteDatabase db = this.getWritableDatabase();
-		String[] args = { message.getUuid() };
-		db.delete(Message.TABLENAME, Message.UUID + "=?", args);
-	}
-
 	public void deleteMessagesInConversation(Conversation conversation) {
 		SQLiteDatabase db = this.getWritableDatabase();
-		String[] args = { conversation.getUuid() };
+		String[] args = {conversation.getUuid()};
 		db.delete(Message.TABLENAME, Message.CONVERSATION + "=?", args);
 	}
 
-	public Conversation findConversationByUuid(String conversationUuid) {
-		SQLiteDatabase db = this.getReadableDatabase();
-		String[] selectionArgs = { conversationUuid };
-		Cursor cursor = db.query(Conversation.TABLENAME, null,
-				Conversation.UUID + "=?", selectionArgs, null, null, null);
-		if (cursor.getCount() == 0) {
+	public Pair<Long, String> getLastMessageReceived(Account account) {
+		try {
+			SQLiteDatabase db = this.getReadableDatabase();
+			String sql = "select messages.timeSent,messages.serverMsgId from accounts join conversations on accounts.uuid=conversations.accountUuid join messages on conversations.uuid=messages.conversationUuid where accounts.uuid=? and (messages.status=0 or messages.carbon=1 or messages.serverMsgId not null) order by messages.timesent desc limit 1";
+			String[] args = {account.getUuid()};
+			Cursor cursor = db.rawQuery(sql, args);
+			if (cursor.getCount() == 0) {
+				return null;
+			} else {
+				cursor.moveToFirst();
+				return new Pair<>(cursor.getLong(0), cursor.getString(1));
+			}
+		} catch (Exception e) {
 			return null;
 		}
-		cursor.moveToFirst();
-		Conversation conversation = Conversation.fromCursor(cursor);
+	}
+
+	private Cursor getCursorForSession(Account account, AxolotlAddress contact) {
+		final SQLiteDatabase db = this.getReadableDatabase();
+		String[] columns = null;
+		String[] selectionArgs = {account.getUuid(),
+				contact.getName(),
+				Integer.toString(contact.getDeviceId())};
+		Cursor cursor = db.query(SQLiteAxolotlStore.SESSION_TABLENAME,
+				columns,
+				SQLiteAxolotlStore.ACCOUNT + " = ? AND "
+						+ SQLiteAxolotlStore.NAME + " = ? AND "
+						+ SQLiteAxolotlStore.DEVICE_ID + " = ? ",
+				selectionArgs,
+				null, null, null);
+
+		return cursor;
+	}
+
+	public SessionRecord loadSession(Account account, AxolotlAddress contact) {
+		SessionRecord session = null;
+		Cursor cursor = getCursorForSession(account, contact);
+		if (cursor.getCount() != 0) {
+			cursor.moveToFirst();
+			try {
+				session = new SessionRecord(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT));
+			} catch (IOException e) {
+				cursor.close();
+				throw new AssertionError(e);
+			}
+		}
 		cursor.close();
-		return conversation;
+		return session;
+	}
+
+	public List<Integer> getSubDeviceSessions(Account account, AxolotlAddress contact) {
+		final SQLiteDatabase db = this.getReadableDatabase();
+		return getSubDeviceSessions(db, account, contact);
 	}
 
-	public Message findMessageByUuid(String messageUuid) {
+	private List<Integer> getSubDeviceSessions(SQLiteDatabase db, Account account, AxolotlAddress contact) {
+		List<Integer> devices = new ArrayList<>();
+		String[] columns = {SQLiteAxolotlStore.DEVICE_ID};
+		String[] selectionArgs = {account.getUuid(),
+				contact.getName()};
+		Cursor cursor = db.query(SQLiteAxolotlStore.SESSION_TABLENAME,
+				columns,
+				SQLiteAxolotlStore.ACCOUNT + " = ? AND "
+						+ SQLiteAxolotlStore.NAME + " = ?",
+				selectionArgs,
+				null, null, null);
+
+		while (cursor.moveToNext()) {
+			devices.add(cursor.getInt(
+					cursor.getColumnIndex(SQLiteAxolotlStore.DEVICE_ID)));
+		}
+
+		cursor.close();
+		return devices;
+	}
+
+	public boolean containsSession(Account account, AxolotlAddress contact) {
+		Cursor cursor = getCursorForSession(account, contact);
+		int count = cursor.getCount();
+		cursor.close();
+		return count != 0;
+	}
+
+	public void storeSession(Account account, AxolotlAddress contact, SessionRecord session) {
+		SQLiteDatabase db = this.getWritableDatabase();
+		ContentValues values = new ContentValues();
+		values.put(SQLiteAxolotlStore.NAME, contact.getName());
+		values.put(SQLiteAxolotlStore.DEVICE_ID, contact.getDeviceId());
+		values.put(SQLiteAxolotlStore.KEY, Base64.encodeToString(session.serialize(), Base64.DEFAULT));
+		values.put(SQLiteAxolotlStore.ACCOUNT, account.getUuid());
+		db.insert(SQLiteAxolotlStore.SESSION_TABLENAME, null, values);
+	}
+
+	public void deleteSession(Account account, AxolotlAddress contact) {
+		SQLiteDatabase db = this.getWritableDatabase();
+		deleteSession(db, account, contact);
+	}
+
+	private void deleteSession(SQLiteDatabase db, Account account, AxolotlAddress contact) {
+		String[] args = {account.getUuid(),
+				contact.getName(),
+				Integer.toString(contact.getDeviceId())};
+		db.delete(SQLiteAxolotlStore.SESSION_TABLENAME,
+				SQLiteAxolotlStore.ACCOUNT + " = ? AND "
+						+ SQLiteAxolotlStore.NAME + " = ? AND "
+						+ SQLiteAxolotlStore.DEVICE_ID + " = ? ",
+				args);
+	}
+
+	public void deleteAllSessions(Account account, AxolotlAddress contact) {
+		SQLiteDatabase db = this.getWritableDatabase();
+		String[] args = {account.getUuid(), contact.getName()};
+		db.delete(SQLiteAxolotlStore.SESSION_TABLENAME,
+				SQLiteAxolotlStore.ACCOUNT + "=? AND "
+						+ SQLiteAxolotlStore.NAME + " = ?",
+				args);
+	}
+
+	private Cursor getCursorForPreKey(Account account, int preKeyId) {
 		SQLiteDatabase db = this.getReadableDatabase();
-		String[] selectionArgs = { messageUuid };
-		Cursor cursor = db.query(Message.TABLENAME, null, Message.UUID + "=?",
-				selectionArgs, null, null, null);
-		if (cursor.getCount() == 0) {
-			return null;
+		String[] columns = {SQLiteAxolotlStore.KEY};
+		String[] selectionArgs = {account.getUuid(), Integer.toString(preKeyId)};
+		Cursor cursor = db.query(SQLiteAxolotlStore.PREKEY_TABLENAME,
+				columns,
+				SQLiteAxolotlStore.ACCOUNT + "=? AND "
+						+ SQLiteAxolotlStore.ID + "=?",
+				selectionArgs,
+				null, null, null);
+
+		return cursor;
+	}
+
+	public PreKeyRecord loadPreKey(Account account, int preKeyId) {
+		PreKeyRecord record = null;
+		Cursor cursor = getCursorForPreKey(account, preKeyId);
+		if (cursor.getCount() != 0) {
+			cursor.moveToFirst();
+			try {
+				record = new PreKeyRecord(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT));
+			} catch (IOException e) {
+				throw new AssertionError(e);
+			}
 		}
-		cursor.moveToFirst();
-		Message message = Message.fromCursor(cursor);
 		cursor.close();
-		return message;
+		return record;
 	}
 
-	public Account findAccountByUuid(String accountUuid) {
+	public boolean containsPreKey(Account account, int preKeyId) {
+		Cursor cursor = getCursorForPreKey(account, preKeyId);
+		int count = cursor.getCount();
+		cursor.close();
+		return count != 0;
+	}
+
+	public void storePreKey(Account account, PreKeyRecord record) {
+		SQLiteDatabase db = this.getWritableDatabase();
+		ContentValues values = new ContentValues();
+		values.put(SQLiteAxolotlStore.ID, record.getId());
+		values.put(SQLiteAxolotlStore.KEY, Base64.encodeToString(record.serialize(), Base64.DEFAULT));
+		values.put(SQLiteAxolotlStore.ACCOUNT, account.getUuid());
+		db.insert(SQLiteAxolotlStore.PREKEY_TABLENAME, null, values);
+	}
+
+	public void deletePreKey(Account account, int preKeyId) {
+		SQLiteDatabase db = this.getWritableDatabase();
+		String[] args = {account.getUuid(), Integer.toString(preKeyId)};
+		db.delete(SQLiteAxolotlStore.PREKEY_TABLENAME,
+				SQLiteAxolotlStore.ACCOUNT + "=? AND "
+						+ SQLiteAxolotlStore.ID + "=?",
+				args);
+	}
+
+	private Cursor getCursorForSignedPreKey(Account account, int signedPreKeyId) {
 		SQLiteDatabase db = this.getReadableDatabase();
-		String[] selectionArgs = { accountUuid };
-		Cursor cursor = db.query(Account.TABLENAME, null, Account.UUID + "=?",
-				selectionArgs, null, null, null);
-		if (cursor.getCount() == 0) {
-			return null;
+		String[] columns = {SQLiteAxolotlStore.KEY};
+		String[] selectionArgs = {account.getUuid(), Integer.toString(signedPreKeyId)};
+		Cursor cursor = db.query(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME,
+				columns,
+				SQLiteAxolotlStore.ACCOUNT + "=? AND " + SQLiteAxolotlStore.ID + "=?",
+				selectionArgs,
+				null, null, null);
+
+		return cursor;
+	}
+
+	public SignedPreKeyRecord loadSignedPreKey(Account account, int signedPreKeyId) {
+		SignedPreKeyRecord record = null;
+		Cursor cursor = getCursorForSignedPreKey(account, signedPreKeyId);
+		if (cursor.getCount() != 0) {
+			cursor.moveToFirst();
+			try {
+				record = new SignedPreKeyRecord(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT));
+			} catch (IOException e) {
+				throw new AssertionError(e);
+			}
 		}
-		cursor.moveToFirst();
-		Account account = Account.fromCursor(cursor);
 		cursor.close();
-		return account;
+		return record;
 	}
 
-	public List<Message> getImageMessages(Conversation conversation) {
-		ArrayList<Message> list = new ArrayList<>();
+	public List<SignedPreKeyRecord> loadSignedPreKeys(Account account) {
+		List<SignedPreKeyRecord> prekeys = new ArrayList<>();
 		SQLiteDatabase db = this.getReadableDatabase();
-		Cursor cursor;
-			String[] selectionArgs = { conversation.getUuid(), String.valueOf(Message.TYPE_IMAGE) };
-			cursor = db.query(Message.TABLENAME, null, Message.CONVERSATION
-					+ "=? AND "+Message.TYPE+"=?", selectionArgs, null, null,null);
+		String[] columns = {SQLiteAxolotlStore.KEY};
+		String[] selectionArgs = {account.getUuid()};
+		Cursor cursor = db.query(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME,
+				columns,
+				SQLiteAxolotlStore.ACCOUNT + "=?",
+				selectionArgs,
+				null, null, null);
+
+		while (cursor.moveToNext()) {
+			try {
+				prekeys.add(new SignedPreKeyRecord(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT)));
+			} catch (IOException ignored) {
+			}
+		}
+		cursor.close();
+		return prekeys;
+	}
+
+	public boolean containsSignedPreKey(Account account, int signedPreKeyId) {
+		Cursor cursor = getCursorForPreKey(account, signedPreKeyId);
+		int count = cursor.getCount();
+		cursor.close();
+		return count != 0;
+	}
+
+	public void storeSignedPreKey(Account account, SignedPreKeyRecord record) {
+		SQLiteDatabase db = this.getWritableDatabase();
+		ContentValues values = new ContentValues();
+		values.put(SQLiteAxolotlStore.ID, record.getId());
+		values.put(SQLiteAxolotlStore.KEY, Base64.encodeToString(record.serialize(), Base64.DEFAULT));
+		values.put(SQLiteAxolotlStore.ACCOUNT, account.getUuid());
+		db.insert(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME, null, values);
+	}
+
+	public void deleteSignedPreKey(Account account, int signedPreKeyId) {
+		SQLiteDatabase db = this.getWritableDatabase();
+		String[] args = {account.getUuid(), Integer.toString(signedPreKeyId)};
+		db.delete(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME,
+				SQLiteAxolotlStore.ACCOUNT + "=? AND "
+						+ SQLiteAxolotlStore.ID + "=?",
+				args);
+	}
+
+	private Cursor getIdentityKeyCursor(Account account, String name, boolean own) {
+		final SQLiteDatabase db = this.getReadableDatabase();
+		return getIdentityKeyCursor(db, account, name, own);
+	}
+
+	private Cursor getIdentityKeyCursor(SQLiteDatabase db, Account account, String name, boolean own) {
+		return getIdentityKeyCursor(db, account, name, own, null);
+	}
+
+	private Cursor getIdentityKeyCursor(Account account, String fingerprint) {
+		final SQLiteDatabase db = this.getReadableDatabase();
+		return getIdentityKeyCursor(db, account, fingerprint);
+	}
+
+	private Cursor getIdentityKeyCursor(SQLiteDatabase db, Account account, String fingerprint) {
+		return getIdentityKeyCursor(db, account, null, null, fingerprint);
+	}
+
+	private Cursor getIdentityKeyCursor(SQLiteDatabase db, Account account, String name, Boolean own, String fingerprint) {
+		String[] columns = {SQLiteAxolotlStore.TRUSTED,
+				SQLiteAxolotlStore.KEY};
+		ArrayList<String> selectionArgs = new ArrayList<>(4);
+		selectionArgs.add(account.getUuid());
+		String selectionString = SQLiteAxolotlStore.ACCOUNT + " = ?";
+		if (name != null) {
+			selectionArgs.add(name);
+			selectionString += " AND " + SQLiteAxolotlStore.NAME + " = ?";
+		}
+		if (fingerprint != null) {
+			selectionArgs.add(fingerprint);
+			selectionString += " AND " + SQLiteAxolotlStore.FINGERPRINT + " = ?";
+		}
+		if (own != null) {
+			selectionArgs.add(own ? "1" : "0");
+			selectionString += " AND " + SQLiteAxolotlStore.OWN + " = ?";
+		}
+		Cursor cursor = db.query(SQLiteAxolotlStore.IDENTITIES_TABLENAME,
+				columns,
+				selectionString,
+				selectionArgs.toArray(new String[selectionArgs.size()]),
+				null, null, null);
+
+		return cursor;
+	}
+
+	public IdentityKeyPair loadOwnIdentityKeyPair(Account account) {
+		SQLiteDatabase db = getReadableDatabase();
+		return loadOwnIdentityKeyPair(db, account);
+	}
+
+	private IdentityKeyPair loadOwnIdentityKeyPair(SQLiteDatabase db, Account account) {
+		String name = account.getJid().toBareJid().toString();
+		IdentityKeyPair identityKeyPair = null;
+		Cursor cursor = getIdentityKeyCursor(db, account, name, true);
+		if (cursor.getCount() != 0) {
+			cursor.moveToFirst();
+			try {
+				identityKeyPair = new IdentityKeyPair(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT));
+			} catch (InvalidKeyException e) {
+				Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Encountered invalid IdentityKey in database for account" + account.getJid().toBareJid() + ", address: " + name);
+			}
+		}
+		cursor.close();
+
+		return identityKeyPair;
+	}
+
+	public Set<IdentityKey> loadIdentityKeys(Account account, String name) {
+		return loadIdentityKeys(account, name, null);
+	}
+
+	public Set<IdentityKey> loadIdentityKeys(Account account, String name, XmppAxolotlSession.Trust trust) {
+		Set<IdentityKey> identityKeys = new HashSet<>();
+		Cursor cursor = getIdentityKeyCursor(account, name, false);
+
+		while (cursor.moveToNext()) {
+			if (trust != null &&
+					cursor.getInt(cursor.getColumnIndex(SQLiteAxolotlStore.TRUSTED))
+							!= trust.getCode()) {
+				continue;
+			}
+			try {
+				identityKeys.add(new IdentityKey(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT), 0));
+			} catch (InvalidKeyException e) {
+				Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + "Encountered invalid IdentityKey in database for account" + account.getJid().toBareJid() + ", address: " + name);
+			}
+		}
+		cursor.close();
+
+		return identityKeys;
+	}
+
+	public long numTrustedKeys(Account account, String name) {
+		SQLiteDatabase db = getReadableDatabase();
+		String[] args = {
+				account.getUuid(),
+				name,
+				String.valueOf(XmppAxolotlSession.Trust.TRUSTED.getCode()),
+				String.valueOf(XmppAxolotlSession.Trust.TRUSTED_X509.getCode())
+		};
+		return DatabaseUtils.queryNumEntries(db, SQLiteAxolotlStore.IDENTITIES_TABLENAME,
+				SQLiteAxolotlStore.ACCOUNT + " = ?"
+						+ " AND " + SQLiteAxolotlStore.NAME + " = ?"
+						+ " AND (" + SQLiteAxolotlStore.TRUSTED + " = ? OR " + SQLiteAxolotlStore.TRUSTED + " = ?)",
+				args
+		);
+	}
+
+	private void storeIdentityKey(Account account, String name, boolean own, String fingerprint, String base64Serialized) {
+		storeIdentityKey(account, name, own, fingerprint, base64Serialized, XmppAxolotlSession.Trust.UNDECIDED);
+	}
+
+	private void storeIdentityKey(Account account, String name, boolean own, String fingerprint, String base64Serialized, XmppAxolotlSession.Trust trusted) {
+		SQLiteDatabase db = this.getWritableDatabase();
+		ContentValues values = new ContentValues();
+		values.put(SQLiteAxolotlStore.ACCOUNT, account.getUuid());
+		values.put(SQLiteAxolotlStore.NAME, name);
+		values.put(SQLiteAxolotlStore.OWN, own ? 1 : 0);
+		values.put(SQLiteAxolotlStore.FINGERPRINT, fingerprint);
+		values.put(SQLiteAxolotlStore.KEY, base64Serialized);
+		values.put(SQLiteAxolotlStore.TRUSTED, trusted.getCode());
+		db.insert(SQLiteAxolotlStore.IDENTITIES_TABLENAME, null, values);
+	}
+
+	public XmppAxolotlSession.Trust isIdentityKeyTrusted(Account account, String fingerprint) {
+		Cursor cursor = getIdentityKeyCursor(account, fingerprint);
+		XmppAxolotlSession.Trust trust = null;
 		if (cursor.getCount() > 0) {
-			cursor.moveToLast();
-			do {
-				Message message = Message.fromCursor(cursor);
-				message.setConversation(conversation);
-				list.add(message);
-			} while (cursor.moveToPrevious());
+			cursor.moveToFirst();
+			int trustValue = cursor.getInt(cursor.getColumnIndex(SQLiteAxolotlStore.TRUSTED));
+			trust = XmppAxolotlSession.Trust.fromCode(trustValue);
 		}
 		cursor.close();
-		return list;
+		return trust;
+	}
+
+	public boolean setIdentityKeyTrust(Account account, String fingerprint, XmppAxolotlSession.Trust trust) {
+		SQLiteDatabase db = this.getWritableDatabase();
+		return setIdentityKeyTrust(db, account, fingerprint, trust);
+	}
+
+	private boolean setIdentityKeyTrust(SQLiteDatabase db, Account account, String fingerprint, XmppAxolotlSession.Trust trust) {
+		String[] selectionArgs = {
+				account.getUuid(),
+				fingerprint
+		};
+		ContentValues values = new ContentValues();
+		values.put(SQLiteAxolotlStore.TRUSTED, trust.getCode());
+		int rows = db.update(SQLiteAxolotlStore.IDENTITIES_TABLENAME, values,
+				SQLiteAxolotlStore.ACCOUNT + " = ? AND "
+						+ SQLiteAxolotlStore.FINGERPRINT + " = ? ",
+				selectionArgs);
+		return rows == 1;
+	}
+
+	public boolean setIdentityKeyCertificate(Account account, String fingerprint, X509Certificate x509Certificate) {
+		SQLiteDatabase db = this.getWritableDatabase();
+		String[] selectionArgs = {
+				account.getUuid(),
+				fingerprint
+		};
+		try {
+			ContentValues values = new ContentValues();
+			values.put(SQLiteAxolotlStore.CERTIFICATE, x509Certificate.getEncoded());
+			return db.update(SQLiteAxolotlStore.IDENTITIES_TABLENAME, values,
+					SQLiteAxolotlStore.ACCOUNT + " = ? AND "
+							+ SQLiteAxolotlStore.FINGERPRINT + " = ? ",
+					selectionArgs) == 1;
+		} catch (CertificateEncodingException e) {
+			Log.d(Config.LOGTAG, "could not encode certificate");
+			return false;
+		}
+	}
+
+	public X509Certificate getIdentityKeyCertifcate(Account account, String fingerprint) {
+		SQLiteDatabase db = this.getReadableDatabase();
+		String[] selectionArgs = {
+				account.getUuid(),
+				fingerprint
+		};
+		String[] colums = {SQLiteAxolotlStore.CERTIFICATE};
+		String selection = SQLiteAxolotlStore.ACCOUNT + " = ? AND " + SQLiteAxolotlStore.FINGERPRINT + " = ? ";
+		Cursor cursor = db.query(SQLiteAxolotlStore.IDENTITIES_TABLENAME, colums, selection, selectionArgs, null, null, null);
+		if (cursor.getCount() < 1) {
+			return null;
+		} else {
+			cursor.moveToFirst();
+			byte[] certificate = cursor.getBlob(cursor.getColumnIndex(SQLiteAxolotlStore.CERTIFICATE));
+			if (certificate == null || certificate.length == 0) {
+				return null;
+			}
+			try {
+				CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");
+				return (X509Certificate) certificateFactory.generateCertificate(new ByteArrayInputStream(certificate));
+			} catch (CertificateException e) {
+				Log.d(Config.LOGTAG,"certificate exception "+e.getMessage());
+				return null;
+			}
+		}
+	}
+
+	public void storeIdentityKey(Account account, String name, IdentityKey identityKey) {
+		storeIdentityKey(account, name, false, identityKey.getFingerprint().replaceAll("\\s", ""), Base64.encodeToString(identityKey.serialize(), Base64.DEFAULT));
+	}
+
+	public void storeOwnIdentityKeyPair(Account account, IdentityKeyPair identityKeyPair) {
+		storeIdentityKey(account, account.getJid().toBareJid().toString(), true, identityKeyPair.getPublicKey().getFingerprint().replaceAll("\\s", ""), Base64.encodeToString(identityKeyPair.serialize(), Base64.DEFAULT), XmppAxolotlSession.Trust.TRUSTED);
+	}
+
+	public void recreateAxolotlDb() {
+		recreateAxolotlDb(getWritableDatabase());
+	}
+
+	public void recreateAxolotlDb(SQLiteDatabase db) {
+		Log.d(Config.LOGTAG, AxolotlServiceImpl.LOGPREFIX + " : " + ">>> (RE)CREATING AXOLOTL DATABASE <<<");
+		db.execSQL("DROP TABLE IF EXISTS " + SQLiteAxolotlStore.SESSION_TABLENAME);
+		db.execSQL(CREATE_SESSIONS_STATEMENT);
+		db.execSQL("DROP TABLE IF EXISTS " + SQLiteAxolotlStore.PREKEY_TABLENAME);
+		db.execSQL(CREATE_PREKEYS_STATEMENT);
+		db.execSQL("DROP TABLE IF EXISTS " + SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME);
+		db.execSQL(CREATE_SIGNED_PREKEYS_STATEMENT);
+		db.execSQL("DROP TABLE IF EXISTS " + SQLiteAxolotlStore.IDENTITIES_TABLENAME);
+		db.execSQL(CREATE_IDENTITIES_STATEMENT);
+	}
+
+	public void wipeAxolotlDb(Account account) {
+		String accountName = account.getUuid();
+		Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(account) + ">>> WIPING AXOLOTL DATABASE FOR ACCOUNT " + accountName + " <<<");
+		SQLiteDatabase db = this.getWritableDatabase();
+		String[] deleteArgs = {
+				accountName
+		};
+		db.delete(SQLiteAxolotlStore.SESSION_TABLENAME,
+				SQLiteAxolotlStore.ACCOUNT + " = ?",
+				deleteArgs);
+		db.delete(SQLiteAxolotlStore.PREKEY_TABLENAME,
+				SQLiteAxolotlStore.ACCOUNT + " = ?",
+				deleteArgs);
+		db.delete(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME,
+				SQLiteAxolotlStore.ACCOUNT + " = ?",
+				deleteArgs);
+		db.delete(SQLiteAxolotlStore.IDENTITIES_TABLENAME,
+				SQLiteAxolotlStore.ACCOUNT + " = ?",
+				deleteArgs);
 	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/persistance/FileBackend.java b/src/main/java/de/thedevstack/conversationsplus/persistance/FileBackend.java
index d58d0583..611f573c 100644
--- a/src/main/java/de/thedevstack/conversationsplus/persistance/FileBackend.java
+++ b/src/main/java/de/thedevstack/conversationsplus/persistance/FileBackend.java
@@ -1,38 +1,32 @@
 package de.thedevstack.conversationsplus.persistance;
 
+import android.graphics.Bitmap;
+import android.net.Uri;
+import android.os.Environment;
+import android.util.Log;
+import android.webkit.MimeTypeMap;
+
 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.net.URL;
 import java.text.SimpleDateFormat;
-import java.util.Arrays;
 import java.util.Date;
 import java.util.Locale;
 
-import android.graphics.Bitmap;
-import android.graphics.BitmapFactory;
-import android.net.Uri;
-import android.os.Environment;
-import android.webkit.MimeTypeMap;
-
 import de.thedevstack.android.logcat.Logging;
-import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.ConversationsPlusApplication;
 import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
+import de.thedevstack.conversationsplus.exceptions.FileCopyException;
+import de.thedevstack.conversationsplus.utils.StreamUtil;
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.R;
-import de.thedevstack.conversationsplus.entities.Transferable;
 import de.thedevstack.conversationsplus.entities.DownloadableFile;
 import de.thedevstack.conversationsplus.entities.Message;
-import de.thedevstack.conversationsplus.exceptions.FileCopyException;
-import de.thedevstack.conversationsplus.utils.ImageUtil;
-import de.thedevstack.conversationsplus.utils.MessageUtil;
-import de.thedevstack.conversationsplus.utils.StreamUtil;
-
-public final class FileBackend {
 
+public class FileBackend {
 	private static final SimpleDateFormat imageDateFormat = new SimpleDateFormat("yyyyMMdd_HHmmssSSS", Locale.US);
 
 	public static DownloadableFile getFile(Message message) {
@@ -40,34 +34,28 @@ public final class FileBackend {
 	}
 
 	public static DownloadableFile getFile(Message message, boolean decrypted) {
+		final boolean encrypted = !decrypted
+				&& (message.getEncryption() == Message.ENCRYPTION_PGP
+				|| message.getEncryption() == Message.ENCRYPTION_DECRYPTED);
+		final DownloadableFile file;
 		String path = message.getRelativeFilePath();
-		String extension;
-		if (path != null && !path.isEmpty()) {
-			String[] parts = path.split("\\.");
-			extension = "."+parts[parts.length - 1];
+		if (path == null) {
+			path = message.getUuid();
+		}
+		if (path.startsWith("/")) {
+			file = new DownloadableFile(path);
 		} else {
-			if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_TEXT) {
-				extension = ".png";
+			String mime = message.getMimeType();
+			if (mime != null && mime.startsWith("image")) {
+				file = new DownloadableFile(getConversationsImageDirectory() + path);
 			} else {
-				extension = "";
+				file = new DownloadableFile(getConversationsFileDirectory() + path);
 			}
-			path = message.getUuid()+extension;
 		}
-		final boolean encrypted = !decrypted
-				&& (message.getEncryption() == Message.ENCRYPTION_PGP
-				|| message.getEncryption() == Message.ENCRYPTION_DECRYPTED);
 		if (encrypted) {
-			return new DownloadableFile(getConversationsFileDirectory()+message.getUuid()+extension+".pgp");
+			return new DownloadableFile(getConversationsFileDirectory() + file.getName() + ".pgp");
 		} else {
-			if (path.startsWith("/")) {
-				return new DownloadableFile(path);
-			} else {
-				if (Arrays.asList(Transferable.VALID_IMAGE_EXTENSIONS).contains(extension)) {
-					return new DownloadableFile(getConversationsImageDirectory() + path);
-				} else {
-					return new DownloadableFile(getConversationsFileDirectory() + path);
-				}
-			}
+			return file;
 		}
 	}
 
@@ -87,12 +75,7 @@ public final class FileBackend {
         return FileBackend.getPrivateFileDirectoryPath() + File.separator + "Images" + File.separator;
     }
 
-	public static DownloadableFile copyFileToPrivateStorage(Message message, Uri uri) throws FileCopyException {
-		Logging.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage");
-		String mime = ConversationsPlusApplication.getInstance().getContentResolver().getType(uri);
-		String extension = MimeTypeMap.getSingleton().getExtensionFromMimeType(mime);
-		message.setRelativeFilePath(FileBackend.getPrivateFileDirectoryPath() + message.getUuid() + "." + extension);
-		DownloadableFile file = getFile(message);
+	public static void copyFileToPrivateStorage(File file, Uri uri) throws FileCopyException {
 		file.getParentFile().mkdirs();
 		OutputStream os = null;
 		InputStream is = null;
@@ -116,36 +99,43 @@ public final class FileBackend {
 			StreamUtil.close(is);
 		}
 		Logging.d(Config.LOGTAG, "output file name " + file);
-		return file;
 	}
 
-	public static DownloadableFile compressImageAndCopyToPrivateStorage(Message message, Bitmap scaledBitmap) throws FileCopyException {
+	public static void copyFileToPrivateStorage(Message message, Uri uri) throws FileCopyException {
+		Log.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage");
+		String mime = ConversationsPlusApplication.getInstance().getContentResolver().getType(uri);
+		String extension = MimeTypeMap.getSingleton().getExtensionFromMimeType(mime);
+		message.setRelativeFilePath(message.getUuid() + "." + extension);
+		copyFileToPrivateStorage(getFile(message), uri);
+	}
+
+    public static DownloadableFile compressImageAndCopyToPrivateStorage(Message message, Bitmap scaledBitmap) throws FileCopyException {
         message.setRelativeFilePath(FileBackend.getPrivateImageDirectoryPath() + message.getUuid() + ".png");
-		DownloadableFile file = getFile(message);
-		file.getParentFile().mkdirs();
-		OutputStream os = null;
-		try {
-			file.createNewFile();
+        DownloadableFile file = getFile(message);
+        file.getParentFile().mkdirs();
+        OutputStream os = null;
+        try {
+            file.createNewFile();
             os = new FileOutputStream(file);
 
-			boolean success = scaledBitmap.compress(Bitmap.CompressFormat.PNG, 75, os);
-			if (!success) {
-				throw new FileCopyException(R.string.error_compressing_image);
-			}
-			os.flush();
+            boolean success = scaledBitmap.compress(Bitmap.CompressFormat.PNG, 75, os);
+            if (!success) {
+                throw new FileCopyException(R.string.error_compressing_image);
+            }
+            os.flush();
         } catch (IOException e) {
             throw new FileCopyException(R.string.error_io_exception, e);
-		} catch (SecurityException e) {
+        } catch (SecurityException e) {
             throw new FileCopyException(R.string.error_security_exception_during_image_copy);
         } catch (NullPointerException e) {
-			throw new FileCopyException(R.string.error_io_exception);
-		} finally {
-			StreamUtil.close(os);
-		}
+            throw new FileCopyException(R.string.error_io_exception);
+        } finally {
+            StreamUtil.close(os);
+        }
         return file;
-	}
+    }
 
-    public static Uri getTakePhotoUri() {
+	public static Uri getTakePhotoUri() {
 		StringBuilder pathBuilder = new StringBuilder();
 		pathBuilder.append(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM));
 		pathBuilder.append('/');
@@ -170,4 +160,4 @@ public final class FileBackend {
     private FileBackend() {
         // Static helper class
     }
-}
\ No newline at end of file
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/services/AbstractConnectionManager.java b/src/main/java/de/thedevstack/conversationsplus/services/AbstractConnectionManager.java
index 6936c635..7c937475 100644
--- a/src/main/java/de/thedevstack/conversationsplus/services/AbstractConnectionManager.java
+++ b/src/main/java/de/thedevstack/conversationsplus/services/AbstractConnectionManager.java
@@ -1,6 +1,37 @@
 package de.thedevstack.conversationsplus.services;
 
-import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
+import android.Manifest;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.os.Build;
+import android.os.PowerManager;
+import android.util.Log;
+import android.util.Pair;
+
+import org.bouncycastle.crypto.engines.AESEngine;
+import org.bouncycastle.crypto.modes.AEADBlockCipher;
+import org.bouncycastle.crypto.modes.GCMBlockCipher;
+import org.bouncycastle.crypto.params.AEADParameters;
+import org.bouncycastle.crypto.params.KeyParameter;
+
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.security.InvalidAlgorithmParameterException;
+import java.security.InvalidKeyException;
+import java.security.NoSuchAlgorithmException;
+
+import javax.crypto.Cipher;
+import javax.crypto.CipherInputStream;
+import javax.crypto.CipherOutputStream;
+import javax.crypto.NoSuchPaddingException;
+import javax.crypto.spec.IvParameterSpec;
+import javax.crypto.spec.SecretKeySpec;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.entities.DownloadableFile;
 
 public class AbstractConnectionManager {
 	protected XmppConnectionService mXmppConnectionService;
@@ -12,4 +43,91 @@ public class AbstractConnectionManager {
 	public XmppConnectionService getXmppConnectionService() {
 		return this.mXmppConnectionService;
 	}
+
+	public boolean hasStoragePermission() {
+		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+			return mXmppConnectionService.checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED;
+		} else {
+			return true;
+		}
+	}
+
+	public static Pair<InputStream,Integer> createInputStream(DownloadableFile file, boolean gcm) throws FileNotFoundException {
+		FileInputStream is;
+		int size;
+		is = new FileInputStream(file);
+		size = (int) file.getSize();
+		if (file.getKey() == null) {
+			return new Pair<InputStream,Integer>(is,size);
+		}
+		try {
+			if (gcm) {
+				AEADBlockCipher cipher = new GCMBlockCipher(new AESEngine());
+				cipher.init(true, new AEADParameters(new KeyParameter(file.getKey()), 128, file.getIv()));
+				InputStream cis = new org.bouncycastle.crypto.io.CipherInputStream(is, cipher);
+				return new Pair<>(cis, cipher.getOutputSize(size));
+			} else {
+				IvParameterSpec ips = new IvParameterSpec(file.getIv());
+				Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
+				cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(file.getKey(), "AES"), ips);
+				Log.d(Config.LOGTAG, "opening encrypted input stream");
+				final int s = Config.REPORT_WRONG_FILESIZE_IN_OTR_JINGLE ? size : (size / 16 + 1) * 16;
+				return new Pair<InputStream,Integer>(new CipherInputStream(is, cipher),s);
+			}
+		} catch (InvalidKeyException e) {
+			return null;
+		} catch (NoSuchAlgorithmException e) {
+			return null;
+		} catch (NoSuchPaddingException e) {
+			return null;
+		} catch (InvalidAlgorithmParameterException e) {
+			return null;
+		}
+	}
+
+	public static OutputStream createAppendedOutputStream(DownloadableFile file) {
+		return createOutputStream(file, false, true);
+	}
+
+	public static OutputStream createOutputStream(DownloadableFile file, boolean gcm) {
+		return createOutputStream(file, gcm, false);
+	}
+
+	private static OutputStream createOutputStream(DownloadableFile file, boolean gcm, boolean append) {
+		FileOutputStream os;
+		try {
+			os = new FileOutputStream(file, append);
+			if (file.getKey() == null) {
+				return os;
+			}
+		} catch (FileNotFoundException e) {
+			return null;
+		}
+		try {
+			if (gcm) {
+				AEADBlockCipher cipher = new GCMBlockCipher(new AESEngine());
+				cipher.init(false, new AEADParameters(new KeyParameter(file.getKey()), 128, file.getIv()));
+				return new org.bouncycastle.crypto.io.CipherOutputStream(os, cipher);
+			} else {
+				IvParameterSpec ips = new IvParameterSpec(file.getIv());
+				Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
+				cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(file.getKey(), "AES"), ips);
+				Log.d(Config.LOGTAG, "opening encrypted output stream");
+				return new CipherOutputStream(os, cipher);
+			}
+		} catch (InvalidKeyException e) {
+			return null;
+		} catch (NoSuchAlgorithmException e) {
+			return null;
+		} catch (NoSuchPaddingException e) {
+			return null;
+		} catch (InvalidAlgorithmParameterException e) {
+			return null;
+		}
+	}
+
+	public PowerManager.WakeLock createWakeLock(String name) {
+		PowerManager powerManager = (PowerManager) mXmppConnectionService.getSystemService(Context.POWER_SERVICE);
+		return powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,name);
+	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/services/AvatarService.java b/src/main/java/de/thedevstack/conversationsplus/services/AvatarService.java
index 1cbda222..11ff36da 100644
--- a/src/main/java/de/thedevstack/conversationsplus/services/AvatarService.java
+++ b/src/main/java/de/thedevstack/conversationsplus/services/AvatarService.java
@@ -13,27 +13,28 @@ import java.util.List;
 import java.util.Locale;
 
 import de.thedevstack.android.logcat.Logging;
-import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.ConversationsPlusApplication;
+import de.thedevstack.conversationsplus.utils.AvatarUtil;
+import de.thedevstack.conversationsplus.utils.ImageUtil;
+import de.thedevstack.conversationsplus.utils.UiUpdateHelper;
+import de.thedevstack.conversationsplus.utils.XmppSendUtil;
+import de.thedevstack.conversationsplus.xmpp.avatar.AvatarPacketGenerator;
+import de.thedevstack.conversationsplus.xmpp.avatar.AvatarPacketParser;
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.R;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Bookmark;
 import de.thedevstack.conversationsplus.entities.Contact;
 import de.thedevstack.conversationsplus.entities.Conversation;
 import de.thedevstack.conversationsplus.entities.ListItem;
+import de.thedevstack.conversationsplus.entities.Message;
 import de.thedevstack.conversationsplus.entities.MucOptions;
 import de.thedevstack.conversationsplus.generator.IqGenerator;
 import de.thedevstack.conversationsplus.persistance.DatabaseBackend;
 import de.thedevstack.conversationsplus.ui.UiCallback;
-import de.thedevstack.conversationsplus.utils.AvatarUtil;
-import de.thedevstack.conversationsplus.utils.ImageUtil;
 import de.thedevstack.conversationsplus.utils.UIHelper;
-import de.thedevstack.conversationsplus.utils.UiUpdateHelper;
-import de.thedevstack.conversationsplus.utils.XmppSendUtil;
 import de.thedevstack.conversationsplus.xml.Element;
 import de.thedevstack.conversationsplus.xmpp.OnIqPacketReceived;
-import de.thedevstack.conversationsplus.xmpp.avatar.AvatarPacketGenerator;
-import de.thedevstack.conversationsplus.xmpp.avatar.AvatarPacketParser;
 import de.thedevstack.conversationsplus.xmpp.pep.Avatar;
 import de.thedevstack.conversationsplus.xmpp.stanzas.IqPacket;
 
@@ -75,6 +76,36 @@ public class AvatarService {
 		return avatar;
 	}
 
+	public Bitmap get(final MucOptions.User user, final int size, boolean cachedOnly) {
+		Contact c = user.getContact();
+		if (c != null && (c.getProfilePhoto() != null || c.getAvatar() != null)) {
+			return get(c, size, cachedOnly);
+		} else {
+			return getImpl(user, size, cachedOnly);
+		}
+	}
+
+	private Bitmap getImpl(final MucOptions.User user, final int size, boolean cachedOnly) {
+		final String KEY = key(user, size);
+		Bitmap avatar = ImageUtil.getBitmapFromCache(KEY);
+		if (avatar != null || cachedOnly) {
+			return avatar;
+		}
+		if (user.getAvatar() != null) {
+			avatar = AvatarUtil.getAvatar(user.getAvatar(), size);
+		}
+		if (avatar == null) {
+			Contact contact = user.getContact();
+			if (contact != null) {
+				avatar = get(contact, size, cachedOnly);
+			} else {
+				avatar = get(user.getName(), size, cachedOnly);
+			}
+		}
+		ImageUtil.addBitmapToCache(KEY, avatar);
+		return avatar;
+	}
+
 	public void clear(Contact contact) {
 		synchronized (this.sizes) {
 			for (Integer size : sizes) {
@@ -93,6 +124,16 @@ public class AvatarService {
 				+ contact.getJid() + "_" + String.valueOf(size);
 	}
 
+	private String key(MucOptions.User user, int size) {
+		synchronized (this.sizes) {
+			if (!this.sizes.contains(size)) {
+				this.sizes.add(size);
+			}
+		}
+		return PREFIX_CONTACT + "_" + user.getAccount().getJid().toBareJid() + "_"
+				+ user.getFullJid() + "_" + String.valueOf(size);
+	}
+
 	public Bitmap get(ListItem item, int size) {
 		return get(item,size,false);
 	}
@@ -138,7 +179,7 @@ public class AvatarService {
 		if (bitmap != null || cachedOnly) {
 			return bitmap;
 		}
-		final List<MucOptions.User> users = new ArrayList<>(mucOptions.getUsers());
+		final List<MucOptions.User> users = mucOptions.getUsers();
 		int count = users.size();
 		bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
 		Canvas canvas = new Canvas(bitmap);
@@ -146,11 +187,10 @@ public class AvatarService {
 
 		if (count == 0) {
 			String name = mucOptions.getConversation().getName();
-			final String letter = name.isEmpty() ? "X" : name.substring(0,1);
-			final int color = UIHelper.getColorForName(name);
-			drawTile(canvas, letter, color, 0, 0, size, size);
+			drawTile(canvas, name, 0, 0, size, size);
 		} else if (count == 1) {
-			drawTile(canvas, users.get(0), 0, 0, size, size);
+			drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size);
+			drawTile(canvas, mucOptions.getConversation().getAccount(), size / 2 + 1, 0, size, size);
 		} else if (count == 2) {
 			drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size);
 			drawTile(canvas, users.get(1), size / 2 + 1, 0, size, size);
@@ -195,9 +235,13 @@ public class AvatarService {
 	}
 
 	public Bitmap get(Account account, int size) {
+		return get(account, size, false);
+	}
+
+	public Bitmap get(Account account, int size, boolean cachedOnly) {
 		final String KEY = key(account, size);
 		Bitmap avatar = ImageUtil.getBitmapFromCache(KEY);
-		if (avatar != null) {
+		if (avatar != null || cachedOnly) {
 			return avatar;
 		}
 		avatar = AvatarUtil.getAvatar(account.getAvatar(), size);
@@ -208,6 +252,24 @@ public class AvatarService {
 		return avatar;
 	}
 
+	public Bitmap get(Message message, int size, boolean cachedOnly) {
+		final Conversation conversation = message.getConversation();
+		if (message.getStatus() == Message.STATUS_RECEIVED) {
+			Contact c = message.getContact();
+			if (c != null && (c.getProfilePhoto() != null || c.getAvatar() != null)) {
+				return get(c, size, cachedOnly);
+			} else if (message.getConversation().getMode() == Conversation.MODE_MULTI){
+				MucOptions.User user = conversation.getMucOptions().findUser(message.getCounterpart().getResourcepart());
+				if (user != null) {
+					return getImpl(user,size,cachedOnly);
+				}
+			}
+			return get(UIHelper.getMessageDisplayName(message), size, cachedOnly);
+		} else  {
+			return get(conversation.getAccount(), size, cachedOnly);
+		}
+	}
+
 	public void clear(Account account) {
 		synchronized (this.sizes) {
 			for (Integer size : sizes) {
@@ -216,6 +278,14 @@ public class AvatarService {
 		}
 	}
 
+	public void clear(MucOptions.User user) {
+		synchronized (this.sizes) {
+			for (Integer size : sizes) {
+				ImageUtil.removeBitmapFromCache(key(user, size));
+			}
+		}
+	}
+
 	private String key(Account account, int size) {
 		synchronized (this.sizes) {
 			if (!this.sizes.contains(size)) {
@@ -239,9 +309,7 @@ public class AvatarService {
 		bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
 		Canvas canvas = new Canvas(bitmap);
 		final String trimmedName = name.trim();
-		final String letter = trimmedName.isEmpty() ? "X" : trimmedName.substring(0,1);
-		final int color = UIHelper.getColorForName(name);
-		drawTile(canvas, letter, color, 0, 0, size, size);
+		drawTile(canvas, trimmedName, 0, 0, size, size);
 		ImageUtil.addBitmapToCache(KEY, bitmap);
 		return bitmap;
 	}
@@ -255,7 +323,7 @@ public class AvatarService {
 		return PREFIX_GENERIC + "_" + name + "_" + String.valueOf(size);
 	}
 
-	private void drawTile(Canvas canvas, String letter, int tileColor,
+	private boolean drawTile(Canvas canvas, String letter, int tileColor,
 						  int left, int top, int right, int bottom) {
 		letter = letter.toUpperCase(Locale.getDefault());
 		Paint tilePaint = new Paint(), textPaint = new Paint();
@@ -271,10 +339,11 @@ public class AvatarService {
 		textPaint.getTextBounds(letter, 0, 1, rect);
 		float width = textPaint.measureText(letter);
 		canvas.drawText(letter, (right + left) / 2 - width / 2, (top + bottom)
-                / 2 + rect.height() / 2, textPaint);
+				/ 2 + rect.height() / 2, textPaint);
+		return true;
 	}
 
-	private void drawTile(Canvas canvas, MucOptions.User user, int left,
+	private boolean drawTile(Canvas canvas, MucOptions.User user, int left,
 						  int top, int right, int bottom) {
 		Contact contact = user.getContact();
 		if (contact != null) {
@@ -284,24 +353,59 @@ public class AvatarService {
 			} else if (contact.getAvatar() != null) {
 				uri = AvatarUtil.getAvatarUri(contact.getAvatar());
 			}
+			if (drawTile(canvas, uri, left, top, right, bottom)) {
+				return true;
+			}
+		} else if (user.getAvatar() != null) {
+			Uri uri = AvatarUtil.getAvatarUri(user.getAvatar());
+			if (drawTile(canvas, uri, left, top, right, bottom)) {
+				return true;
+			}
+		}
+		String name = contact != null ? contact.getDisplayName() : user.getName();
+		drawTile(canvas, name, left, top, right, bottom);
+		return true;
+	}
+
+	private boolean drawTile(Canvas canvas, Account account, int left, int top, int right, int bottom) {
+		String avatar = account.getAvatar();
+		if (avatar != null) {
+			Uri uri = AvatarUtil.getAvatarUri(avatar);
 			if (uri != null) {
-				Bitmap bitmap = ImageUtil.cropCenter(uri, bottom - top, right - left);
-				if (bitmap != null) {
-					drawTile(canvas, bitmap, left, top, right, bottom);
-					return;
+				if (drawTile(canvas, uri, left, top, right, bottom)) {
+					return true;
 				}
 			}
 		}
-		String name = contact != null ? contact.getDisplayName() : user.getName();
-		final String letter = name.isEmpty() ? "X" : name.substring(0,1);
-		final int color = UIHelper.getColorForName(name);
-		drawTile(canvas, letter, color, left, top, right, bottom);
+		return drawTile(canvas, account.getJid().toBareJid().toString(), left, top, right, bottom);
+	}
+
+	private boolean drawTile(Canvas canvas, String name, int left, int top, int right, int bottom) {
+		if (name != null) {
+			final String letter = name.isEmpty() ? "X" : name.substring(0, 1);
+			final int color = UIHelper.getColorForName(name);
+			drawTile(canvas, letter, color, left, top, right, bottom);
+			return true;
+		}
+		return false;
+	}
+
+	private boolean drawTile(Canvas canvas, Uri uri, int left, int top, int right, int bottom) {
+		if (uri != null) {
+			Bitmap bitmap = ImageUtil.cropCenter(uri, bottom - top, right - left);
+			if (bitmap != null) {
+				drawTile(canvas, bitmap, left, top, right, bottom);
+				return true;
+			}
+		}
+		return false;
 	}
 
-	private void drawTile(Canvas canvas, Bitmap bm, int dstleft, int dsttop,
+	private boolean drawTile(Canvas canvas, Bitmap bm, int dstleft, int dsttop,
 						  int dstright, int dstbottom) {
 		Rect dst = new Rect(dstleft, dsttop, dstright, dstbottom);
 		canvas.drawBitmap(bm, null, dst, null);
+		return true;
 	}
 
 	public void publishAvatar(final Account account,
diff --git a/src/main/java/de/thedevstack/conversationsplus/services/ContactChooserTargetService.java b/src/main/java/de/thedevstack/conversationsplus/services/ContactChooserTargetService.java
new file mode 100644
index 00000000..8d48d686
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/services/ContactChooserTargetService.java
@@ -0,0 +1,83 @@
+package de.thedevstack.conversationsplus.services;
+
+import android.annotation.TargetApi;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.ServiceConnection;
+import android.graphics.drawable.Icon;
+import android.os.Build;
+import android.os.Bundle;
+import android.os.IBinder;
+import android.service.chooser.ChooserTarget;
+import android.service.chooser.ChooserTargetService;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.ui.ShareWithActivity;
+
+@TargetApi(Build.VERSION_CODES.M)
+public class ContactChooserTargetService extends ChooserTargetService implements ServiceConnection {
+
+	private final Object lock = new Object();
+
+	private XmppConnectionService mXmppConnectionService;
+
+	private final int MAX_TARGETS = 5;
+
+	@Override
+	public List<ChooserTarget> onGetChooserTargets(ComponentName targetActivityName, IntentFilter matchedFilter) {
+		Intent intent = new Intent(this, XmppConnectionService.class);
+		intent.setAction("contact_chooser");
+		startService(intent);
+		bindService(intent, this, Context.BIND_AUTO_CREATE);
+		ArrayList<ChooserTarget> chooserTargets = new ArrayList<>();
+		try {
+			waitForService();
+			final ArrayList<Conversation> conversations = new ArrayList<>();
+			if (!mXmppConnectionService.areMessagesInitialized()) {
+				return chooserTargets;
+			}
+			mXmppConnectionService.populateWithOrderedConversations(conversations, false);
+			final ComponentName componentName = new ComponentName(this, ShareWithActivity.class);
+			final int pixel = (int) (48 * getResources().getDisplayMetrics().density);
+			for(int i = 0; i < Math.min(conversations.size(),MAX_TARGETS); ++i) {
+				final Conversation conversation = conversations.get(i);
+				final String name = conversation.getName();
+				final Icon icon = Icon.createWithBitmap(AvatarService.getInstance().get(conversation, pixel));
+				final float score = (1.0f / MAX_TARGETS) * i;
+				final Bundle extras = new Bundle();
+				extras.putString("uuid", conversation.getUuid());
+				chooserTargets.add(new ChooserTarget(name, icon, score, componentName, extras));
+			}
+		} catch (InterruptedException e) {
+		}
+		unbindService(this);
+		return chooserTargets;
+	}
+
+	@Override
+	public void onServiceConnected(ComponentName name, IBinder service) {
+		XmppConnectionService.XmppConnectionBinder binder = (XmppConnectionService.XmppConnectionBinder) service;
+		mXmppConnectionService = binder.getService();
+		synchronized (this.lock) {
+			lock.notifyAll();
+		}
+	}
+
+	@Override
+	public void onServiceDisconnected(ComponentName name) {
+		mXmppConnectionService = null;
+	}
+
+	private void waitForService() throws InterruptedException {
+		if (mXmppConnectionService == null) {
+			synchronized (this.lock) {
+				lock.wait();
+			}
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/services/EventReceiver.java b/src/main/java/de/thedevstack/conversationsplus/services/EventReceiver.java
index 4367dd1b..85e92552 100644
--- a/src/main/java/de/thedevstack/conversationsplus/services/EventReceiver.java
+++ b/src/main/java/de/thedevstack/conversationsplus/services/EventReceiver.java
@@ -1,10 +1,11 @@
 package de.thedevstack.conversationsplus.services;
 
-import de.thedevstack.conversationsplus.persistance.DatabaseBackend;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 
+import de.thedevstack.conversationsplus.persistance.DatabaseBackend;
+
 public class EventReceiver extends BroadcastReceiver {
 	@Override
 	public void onReceive(Context context, Intent intent) {
diff --git a/src/main/java/de/thedevstack/conversationsplus/services/ExportLogsService.java b/src/main/java/de/thedevstack/conversationsplus/services/ExportLogsService.java
new file mode 100644
index 00000000..0b898125
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/services/ExportLogsService.java
@@ -0,0 +1,147 @@
+package de.thedevstack.conversationsplus.services;
+
+import android.app.NotificationManager;
+import android.app.Service;
+import android.content.Context;
+import android.content.Intent;
+import android.os.IBinder;
+import android.support.v4.app.NotificationCompat;
+
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.persistance.DatabaseBackend;
+import de.thedevstack.conversationsplus.persistance.FileBackend;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class ExportLogsService extends Service {
+
+	private static final SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");
+	private static final String DIRECTORY_STRING_FORMAT = FileBackend.getConversationsFileDirectory() + "/logs/%s";
+	private static final String MESSAGE_STRING_FORMAT = "(%s) %s: %s\n";
+	private static final int NOTIFICATION_ID = 1;
+	private static AtomicBoolean running = new AtomicBoolean(false);
+	private DatabaseBackend mDatabaseBackend;
+	private List<Account> mAccounts;
+
+	@Override
+	public void onCreate() {
+		mDatabaseBackend = DatabaseBackend.getInstance(getBaseContext());
+		mAccounts = mDatabaseBackend.getAccounts();
+	}
+
+	@Override
+	public int onStartCommand(Intent intent, int flags, int startId) {
+		if (running.compareAndSet(false, true)) {
+			new Thread(new Runnable() {
+				@Override
+				public void run() {
+					running.set(false);
+					export();
+					stopForeground(true);
+					stopSelf();
+				}
+			}).start();
+		}
+		return START_NOT_STICKY;
+	}
+
+	private void export() {
+		List<Conversation> conversations = mDatabaseBackend.getConversations(Conversation.STATUS_AVAILABLE);
+		conversations.addAll(mDatabaseBackend.getConversations(Conversation.STATUS_ARCHIVED));
+		NotificationManager mNotifyManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
+		NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(getBaseContext());
+		mBuilder.setContentTitle(getString(R.string.notification_export_logs_title))
+				.setSmallIcon(R.drawable.ic_import_export_white_24dp)
+				.setProgress(conversations.size(), 0, false);
+		startForeground(NOTIFICATION_ID, mBuilder.build());
+
+		int progress = 0;
+		for (Conversation conversation : conversations) {
+			writeToFile(conversation);
+			progress++;
+			mBuilder.setProgress(conversations.size(), progress, false);
+			mNotifyManager.notify(NOTIFICATION_ID, mBuilder.build());
+		}
+	}
+
+	private void writeToFile(Conversation conversation) {
+		Jid accountJid = resolveAccountUuid(conversation.getAccountUuid());
+		Jid contactJid = conversation.getJid();
+
+		File dir = new File(String.format(DIRECTORY_STRING_FORMAT,accountJid.toBareJid().toString()));
+		dir.mkdirs();
+
+		BufferedWriter bw = null;
+		try {
+			for (Message message : mDatabaseBackend.getMessagesIterable(conversation)) {
+				if (message.getType() == Message.TYPE_TEXT || message.hasFileOnRemoteHost()) {
+					String date = simpleDateFormat.format(new Date(message.getTimeSent()));
+					if (bw == null) {
+						bw = new BufferedWriter(new FileWriter(
+								new File(dir, contactJid.toBareJid().toString() + ".txt")));
+					}
+					String jid = null;
+					switch (message.getStatus()) {
+						case Message.STATUS_RECEIVED:
+							jid = getMessageCounterpart(message);
+							break;
+						case Message.STATUS_SEND:
+						case Message.STATUS_SEND_RECEIVED:
+						case Message.STATUS_SEND_DISPLAYED:
+							jid = accountJid.toBareJid().toString();
+							break;
+					}
+					if (jid != null) {
+						String body = message.hasFileOnRemoteHost() ? message.getFileParams().url.toString() : message.getBody();
+						bw.write(String.format(MESSAGE_STRING_FORMAT, date, jid,
+								body.replace("\\\n", "\\ \n").replace("\n", "\\ \n")));
+					}
+				}
+			}
+		} catch (IOException e) {
+			e.printStackTrace();
+		} finally {
+			try {
+				if (bw != null) {
+					bw.close();
+				}
+			} catch (IOException e1) {
+				e1.printStackTrace();
+			}
+		}
+	}
+
+	private Jid resolveAccountUuid(String accountUuid) {
+		for (Account account : mAccounts) {
+			if (account.getUuid().equals(accountUuid)) {
+				return account.getJid();
+			}
+		}
+		return null;
+	}
+
+	private String getMessageCounterpart(Message message) {
+		String trueCounterpart = (String) message.getContentValues().get(Message.TRUE_COUNTERPART);
+		if (trueCounterpart != null) {
+			return trueCounterpart;
+		} else {
+			return message.getCounterpart().toString();
+		}
+	}
+
+	@Override
+	public IBinder onBind(Intent intent) {
+		return null;
+	}
+}
\ No newline at end of file
diff --git a/src/main/java/de/thedevstack/conversationsplus/services/MessageArchiveService.java b/src/main/java/de/thedevstack/conversationsplus/services/MessageArchiveService.java
index 1e0abec1..a61ade40 100644
--- a/src/main/java/de/thedevstack/conversationsplus/services/MessageArchiveService.java
+++ b/src/main/java/de/thedevstack/conversationsplus/services/MessageArchiveService.java
@@ -1,5 +1,7 @@
 package de.thedevstack.conversationsplus.services;
 
+import android.util.Pair;
+
 import java.math.BigInteger;
 import java.util.ArrayList;
 import java.util.HashSet;
@@ -22,8 +24,8 @@ public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
 
 	private final XmppConnectionService mXmppConnectionService;
 
-	private final HashSet<Query> queries = new HashSet<Query>();
-	private final ArrayList<Query> pendingQueries = new ArrayList<Query>();
+	private final HashSet<Query> queries = new HashSet<>();
+	private final ArrayList<Query> pendingQueries = new ArrayList<>();
 
 	public enum PagingOrder {
 		NORMAL,
@@ -34,7 +36,15 @@ public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
 		this.mXmppConnectionService = service;
 	}
 
-	public void catchup(final Account account) {
+	private void catchup(final Account account) {
+		synchronized (this.queries) {
+			for(Iterator<Query> iterator = this.queries.iterator(); iterator.hasNext();) {
+				Query query = iterator.next();
+				if (query.getAccount() == account) {
+					iterator.remove();
+				}
+			}
+		}
 		long startCatchup = getLastMessageTransmitted(account);
 		long endCatchup = account.getXmppConnection().getLastSessionEstablished();
 		if (startCatchup == 0) {
@@ -53,21 +63,33 @@ public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
 		this.execute(query);
 	}
 
-	private long getLastMessageTransmitted(final Account account) {
-		long timestamp = 0;
-		for(final Conversation conversation : mXmppConnectionService.getConversations()) {
-			if (conversation.getAccount() == account) {
-				long tmp = conversation.getLastMessageTransmitted();
-				if (tmp > timestamp) {
-					timestamp = tmp;
-				}
-			}
+	public void catchupMUC(final Conversation conversation) {
+		if (conversation.getLastMessageTransmitted() < 0 && conversation.countMessages() == 0) {
+			query(conversation,
+					0,
+					System.currentTimeMillis());
+		} else {
+			query(conversation,
+					conversation.getLastMessageTransmitted(),
+					System.currentTimeMillis());
 		}
-		return timestamp;
+	}
+
+	private long getLastMessageTransmitted(final Account account) {
+		Pair<Long,String> pair = mXmppConnectionService.databaseBackend.getLastMessageReceived(account);
+		return pair == null ? 0 : pair.first;
 	}
 
 	public Query query(final Conversation conversation) {
-		return query(conversation,conversation.getAccount().getXmppConnection().getLastSessionEstablished());
+		if (conversation.getLastMessageTransmitted() < 0 && conversation.countMessages() == 0) {
+			return query(conversation,
+					0,
+					System.currentTimeMillis());
+		} else {
+			return query(conversation,
+					conversation.getLastMessageTransmitted(),
+					conversation.getAccount().getXmppConnection().getLastSessionEstablished());
+		}
 	}
 
 	public Query query(final Conversation conversation, long end) {
@@ -80,6 +102,7 @@ public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
 				return null;
 			}
 			final Query query = new Query(conversation, start, end,PagingOrder.REVERSE);
+			query.reference = conversation.getFirstMamReference();
 			this.queries.add(query);
 			this.execute(query);
 			return query;
@@ -110,9 +133,16 @@ public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
 			this.mXmppConnectionService.sendIqPacket(account, packet, new OnIqPacketReceived() {
 				@Override
 				public void onIqPacketReceived(Account account, IqPacket packet) {
-					if (packet.getType() == IqPacket.TYPE.ERROR) {
+					if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
+						synchronized (MessageArchiveService.this.queries) {
+							MessageArchiveService.this.queries.remove(query);
+							if (query.hasCallback()) {
+								query.callback(false);
+							}
+						}
+					} else if (packet.getType() != IqPacket.TYPE.RESULT) {
 						Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": error executing mam: " + packet.toString());
-						finalizeQuery(query);
+						finalizeQuery(query, true);
 					}
 				}
 			});
@@ -123,32 +153,29 @@ public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
 		}
 	}
 
-	private void finalizeQuery(Query query) {
+	private void finalizeQuery(Query query, boolean done) {
 		synchronized (this.queries) {
 			this.queries.remove(query);
 		}
 		final Conversation conversation = query.getConversation();
 		if (conversation != null) {
 			conversation.sort();
-			if (conversation.setLastMessageTransmitted(query.getEnd())) {
-				this.mXmppConnectionService.databaseBackend.updateConversation(conversation);
-			}
-			if (query.hasCallback()) {
-				query.callback();
-			} else {
-				conversation.setHasMessagesLeftOnServer(query.getMessageCount() > 0);
-				this.mXmppConnectionService.updateConversationUi();
-			}
+			conversation.setHasMessagesLeftOnServer(!done);
 		} else {
 			for(Conversation tmp : this.mXmppConnectionService.getConversations()) {
 				if (tmp.getAccount() == query.getAccount()) {
 					tmp.sort();
-					if (tmp.setLastMessageTransmitted(query.getEnd())) {
-						this.mXmppConnectionService.databaseBackend.updateConversation(tmp);
-					}
 				}
 			}
 		}
+		if (query.hasCallback()) {
+			query.callback(done);
+		} else {
+            if (null != conversation) {
+                conversation.setHasMessagesLeftOnServer(query.getMessageCount() > 0);
+            }
+			this.mXmppConnectionService.updateConversationUi();
+		}
 	}
 
 	public boolean queryInProgress(Conversation conversation, XmppConnectionService.OnMoreMessagesLoaded callback) {
@@ -165,6 +192,10 @@ public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
 		}
 	}
 
+	public boolean queryInProgress(Conversation conversation) {
+		return queryInProgress(conversation, null);
+	}
+
 	public void processFin(Element fin, Jid from) {
 		if (fin == null) {
 			return;
@@ -179,9 +210,16 @@ public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
 		Element first = set == null ? null : set.findChild("first");
 		Element relevant = query.getPagingOrder() == PagingOrder.NORMAL ? last : first;
 		boolean abort = (query.getStart() == 0 && query.getTotalCount() >= Config.PAGE_SIZE) || query.getTotalCount() >= Config.MAM_MAX_MESSAGES;
+		if (query.getConversation() != null) {
+			query.getConversation().setFirstMamReference(first == null ? null : first.getContent());
+		}
 		if (complete || relevant == null || abort) {
-			this.finalizeQuery(query);
-			Logging.d(Config.LOGTAG,query.getAccount().getJid().toBareJid().toString()+": finished mam after "+query.getTotalCount()+" messages");
+			final boolean done = (complete || query.getMessageCount() == 0) && query.getStart() == 0;
+			this.finalizeQuery(query, done);
+			Logging.d(Config.LOGTAG,query.getAccount().getJid().toBareJid()+": finished mam after "+query.getTotalCount()+" messages. messages left="+Boolean.toString(!done));
+			if (query.getWith() == null && query.getMessageCount() > 0) {
+				mXmppConnectionService.getNotificationService().finishBacklog(true);
+			}
 		} else {
 			final Query nextQuery;
 			if (query.getPagingOrder() == PagingOrder.NORMAL) {
@@ -190,9 +228,8 @@ public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
 				nextQuery = query.prev(first == null ? null : first.getContent());
 			}
 			this.execute(nextQuery);
-			this.finalizeQuery(query);
+			this.finalizeQuery(query, false);
 			synchronized (this.queries) {
-				this.queries.remove(query);
 				this.queries.add(nextQuery);
 			}
 		}
@@ -298,10 +335,10 @@ public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
 			this.callback = callback;
 		}
 
-		public void callback() {
+		public void callback(boolean done) {
 			if (this.callback != null) {
 				this.callback.onMoreMessagesLoaded(messageCount,conversation);
-				if (messageCount == 0) {
+				if (done) {
 					this.callback.informUser(R.string.no_more_history_on_server);
 				}
 			}
@@ -319,12 +356,9 @@ public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
 			return this.account;
 		}
 
-		public void incrementTotalCount() {
-			this.totalCount++;
-		}
-
 		public void incrementMessageCount() {
 			this.messageCount++;
+			this.totalCount++;
 		}
 
 		public int getTotalCount() {
@@ -347,7 +381,8 @@ public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
 		public String toString() {
 			StringBuilder builder = new StringBuilder();
 			if (this.muc()) {
-				builder.append("to="+this.getWith().toString());
+				builder.append("to=");
+				builder.append(this.getWith().toString());
 			} else {
 				builder.append("with=");
 				if (this.getWith() == null) {
diff --git a/src/main/java/de/thedevstack/conversationsplus/services/NotificationService.java b/src/main/java/de/thedevstack/conversationsplus/services/NotificationService.java
index b02b4d82..92b7cfa1 100644
--- a/src/main/java/de/thedevstack/conversationsplus/services/NotificationService.java
+++ b/src/main/java/de/thedevstack/conversationsplus/services/NotificationService.java
@@ -1,6 +1,5 @@
 package de.thedevstack.conversationsplus.services;
 
-import android.annotation.SuppressLint;
 import android.app.Notification;
 import android.app.NotificationManager;
 import android.app.PendingIntent;
@@ -9,7 +8,6 @@ import android.content.Intent;
 import android.graphics.Bitmap;
 import android.net.Uri;
 import android.os.Build;
-import android.os.PowerManager;
 import android.os.SystemClock;
 import android.support.v4.app.NotificationCompat;
 import android.support.v4.app.NotificationCompat.BigPictureStyle;
@@ -27,12 +25,11 @@ import java.util.Calendar;
 import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.List;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
 
 import de.thedevstack.conversationsplus.ConversationsPlusApplication;
 import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
 import de.thedevstack.conversationsplus.utils.ImageUtil;
+import de.thedevstack.conversationsplus.utils.MessageUtil;
 import de.tzur.conversations.Settings;
 import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.R;
@@ -67,9 +64,7 @@ public class NotificationService {
                 && !message.isRead()
                 && ConversationsPlusPreferences.showNotification()
                 && !message.getConversation().isMuted()
-                && (message.getConversation().getMode() == Conversation.MODE_SINGLE
-                    || ConversationsPlusPreferences.alwaysNotifyInConference()
-                    || wasHighlightedOrPrivate(message)
+                && (message.getConversation().alwaysNotify() || wasHighlightedOrPrivate(message)
         );
 	}
 
@@ -109,47 +104,47 @@ public class NotificationService {
 		}
 	}
 
-	@SuppressLint("NewApi")
-	@SuppressWarnings("deprecation")
-	private boolean isInteractive() {
-		final PowerManager pm = (PowerManager) mXmppConnectionService
-			.getSystemService(Context.POWER_SERVICE);
+	public void pushFromBacklog(final Message message) {
+		if (notify(message)) {
+			synchronized (notifications) {
+				pushToStack(message);
+			}
+		}
+	}
 
-		final boolean isScreenOn;
-		if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
-			isScreenOn = pm.isScreenOn();
-		} else {
-			isScreenOn = pm.isInteractive();
+	public void finishBacklog(boolean notify) {
+		synchronized (notifications) {
+			mXmppConnectionService.updateUnreadCountBadge();
+			updateNotification(notify);
 		}
+	}
 
-		return isScreenOn;
+	private void pushToStack(final Message message) {
+		final String conversationUuid = message.getConversationUuid();
+		if (notifications.containsKey(conversationUuid)) {
+			notifications.get(conversationUuid).add(message);
+		} else {
+			final ArrayList<Message> mList = new ArrayList<>();
+			mList.add(message);
+			notifications.put(conversationUuid, mList);
+		}
 	}
 
 	public void push(final Message message) {
 		if (!notify(message)) {
 			return;
 		}
-        mXmppConnectionService.updateUnreadCountBadge();
-
-		final boolean isScreenOn = isInteractive();
-
+		mXmppConnectionService.updateUnreadCountBadge();
+		final boolean isScreenOn = mXmppConnectionService.isInteractive();
 		if (this.mIsInForeground && isScreenOn && this.mOpenConversation == message.getConversation()) {
 			return;
 		}
-
 		synchronized (notifications) {
-			final String conversationUuid = message.getConversationUuid();
-			if (notifications.containsKey(conversationUuid)) {
-				notifications.get(conversationUuid).add(message);
-			} else {
-				final ArrayList<Message> mList = new ArrayList<>();
-				mList.add(message);
-				notifications.put(conversationUuid, mList);
-			}
+			pushToStack(message);
 			final Account account = message.getConversation().getAccount();
 			final boolean doNotify = (!(this.mIsInForeground && this.mOpenConversation == null) || !isScreenOn)
-				&& !account.inGracePeriod()
-				&& !this.inMiniGracePeriod(account);
+					&& !account.inGracePeriod()
+					&& !this.inMiniGracePeriod(account);
 			updateNotification(doNotify);
 			if (doNotify) {
 				notifyPebble(message);
@@ -172,10 +167,10 @@ public class NotificationService {
 	}
 
 	private void setNotificationColor(final Builder mBuilder) {
-		mBuilder.setColor(mXmppConnectionService.getResources().getColor(R.color.notification));
+		mBuilder.setColor(mXmppConnectionService.getResources().getColor(R.color.primary));
 	}
 
-	private void updateNotification(final boolean notify) {
+	public void updateNotification(final boolean notify) {
 		final NotificationManager notificationManager = (NotificationManager) ConversationsPlusApplication.getAppContext().getSystemService(Context.NOTIFICATION_SERVICE);
 
 		final String ringtone = ConversationsPlusPreferences.notificationRingtone();
@@ -230,8 +225,13 @@ public class NotificationService {
 			if (messages.size() > 0) {
 				conversation = messages.get(0).getConversation();
 				final String name = conversation.getName();
-				style.addLine(Html.fromHtml("<b>" + name + "</b> "
-							+ UIHelper.getMessagePreview(mXmppConnectionService,messages.get(0)).first));
+				if (Config.HIDE_MESSAGE_TEXT_IN_NOTIFICATION) {
+					int count = messages.size();
+					style.addLine(Html.fromHtml("<b>"+name+"</b>: "+mXmppConnectionService.getResources().getQuantityString(R.plurals.x_messages,count,count)));
+				} else {
+					style.addLine(Html.fromHtml("<b>" + name + "</b>: "
+							+ UIHelper.getMessagePreview(mXmppConnectionService, messages.get(0)).first));
+				}
 				names.append(name);
 				names.append(", ");
 			}
@@ -259,25 +259,32 @@ public class NotificationService {
 			final Conversation conversation = messages.get(0).getConversation();
 			mBuilder.setLargeIcon(AvatarService.getInstance().get(conversation, getPixel(64)));
 			mBuilder.setContentTitle(conversation.getName());
-			Message message;
-			if ((message = getImage(messages)) != null) {
-				modifyForImage(mBuilder, message, messages, notify);
+			if (Config.HIDE_MESSAGE_TEXT_IN_NOTIFICATION) {
+				int count = messages.size();
+				mBuilder.setContentText(mXmppConnectionService.getResources().getQuantityString(R.plurals.x_messages,count,count));
 			} else {
-				modifyForTextOnly(mBuilder, messages, notify);
-			}
-			if ((message = getFirstDownloadableMessage(messages)) != null) {
-				mBuilder.addAction(
-						Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP ?
-								R.drawable.ic_file_download_white_24dp : R.drawable.ic_action_download,
-						mXmppConnectionService.getResources().getString(R.string.download_x_file,
-							UIHelper.getFileDescriptionString(mXmppConnectionService, message)),
-						createDownloadIntent(message)
-						);
-			}
-			if ((message = getFirstLocationMessage(messages)) != null) {
-				mBuilder.addAction(R.drawable.ic_room_white_24dp,
-						mXmppConnectionService.getString(R.string.show_location),
-						createShowLocationIntent(message));
+				Message message;
+				if ((message = getImage(messages)) != null) {
+					modifyForImage(mBuilder, message, messages, notify);
+				} else if (conversation.getMode() == Conversation.MODE_MULTI) {
+					modifyForConference(mBuilder, conversation, messages, notify);
+				} else {
+					modifyForTextOnly(mBuilder, messages, notify);
+				}
+				if ((message = getFirstDownloadableMessage(messages)) != null) {
+					mBuilder.addAction(
+							Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP ?
+									R.drawable.ic_file_download_white_24dp : R.drawable.ic_action_download,
+							mXmppConnectionService.getResources().getString(R.string.download_x_file,
+									UIHelper.getFileDescriptionString(mXmppConnectionService, message)),
+							createDownloadIntent(message)
+					);
+				}
+				if ((message = getFirstLocationMessage(messages)) != null) {
+					mBuilder.addAction(R.drawable.ic_room_white_24dp,
+							mXmppConnectionService.getString(R.string.show_location),
+							createShowLocationIntent(message));
+				}
 			}
 			mBuilder.setContentIntent(createContentIntent(conversation));
 		}
@@ -285,7 +292,7 @@ public class NotificationService {
 	}
 
 	private void modifyForImage(final Builder builder, final Message message,
-			final ArrayList<Message> messages, final boolean notify) {
+								final ArrayList<Message> messages, final boolean notify) {
 		try {
 			final Bitmap bitmap = ImageUtil.getThumbnail(message, getPixel(288), false);
 			final ArrayList<Message> tmp = new ArrayList<>();
@@ -293,17 +300,17 @@ public class NotificationService {
 				if (msg.getType() == Message.TYPE_TEXT
 						&& msg.getTransferable() == null) {
 					tmp.add(msg);
-						}
+				}
 			}
 			final BigPictureStyle bigPictureStyle = new NotificationCompat.BigPictureStyle();
 			bigPictureStyle.bigPicture(bitmap);
 			if (tmp.size() > 0) {
 				bigPictureStyle.setSummaryText(getMergedBodies(tmp));
-				builder.setContentText(UIHelper.getMessagePreview(mXmppConnectionService,tmp.get(0)).first);
+				builder.setContentText(UIHelper.getMessagePreview(mXmppConnectionService, tmp.get(0)).first);
 			} else {
 				builder.setContentText(mXmppConnectionService.getString(
 						R.string.received_x_file,
-						UIHelper.getFileDescriptionString(mXmppConnectionService,message)));
+						UIHelper.getFileDescriptionString(mXmppConnectionService, message)));
 			}
 			builder.setStyle(bigPictureStyle);
 		} catch (final FileNotFoundException e) {
@@ -312,19 +319,40 @@ public class NotificationService {
 	}
 
 	private void modifyForTextOnly(final Builder builder,
-			final ArrayList<Message> messages, final boolean notify) {
+								   final ArrayList<Message> messages, final boolean notify) {
 		builder.setStyle(new NotificationCompat.BigTextStyle().bigText(getMergedBodies(messages)));
-		builder.setContentText(UIHelper.getMessagePreview(mXmppConnectionService,messages.get(0)).first);
+		builder.setContentText(UIHelper.getMessagePreview(mXmppConnectionService, messages.get(0)).first);
 		if (notify) {
-			builder.setTicker(UIHelper.getMessagePreview(mXmppConnectionService,messages.get(messages.size() - 1)).first);
+			builder.setTicker(UIHelper.getMessagePreview(mXmppConnectionService, messages.get(messages.size() - 1)).first);
+		}
+	}
+
+	private void modifyForConference(Builder builder, Conversation conversation, List<Message> messages, boolean notify) {
+		final Message first = messages.get(0);
+		final Message last = messages.get(messages.size() - 1);
+		final NotificationCompat.InboxStyle style = new NotificationCompat.InboxStyle();
+		style.setBigContentTitle(conversation.getName());
+
+		for(Message message : messages) {
+			if (message.hasMeCommand()) {
+				style.addLine(UIHelper.getMessagePreview(mXmppConnectionService,message).first);
+			} else {
+				style.addLine(Html.fromHtml("<b>" + UIHelper.getMessageDisplayName(message) + "</b>: " + UIHelper.getMessagePreview(mXmppConnectionService, message).first));
+			}
+		}
+		builder.setContentText((first.hasMeCommand() ? "" :UIHelper.getMessageDisplayName(first)+ ": ") +UIHelper.getMessagePreview(mXmppConnectionService, first).first);
+		builder.setStyle(style);
+		if (notify) {
+			builder.setTicker((last.hasMeCommand() ? "" : UIHelper.getMessageDisplayName(last) + ": ") + UIHelper.getMessagePreview(mXmppConnectionService,last).first);
 		}
 	}
 
 	private Message getImage(final Iterable<Message> messages) {
 		for (final Message message : messages) {
-			if (message.getType() == Message.TYPE_IMAGE
+			if (message.getType() != Message.TYPE_TEXT
 					&& message.getTransferable() == null
-					&& message.getEncryption() != Message.ENCRYPTION_PGP) {
+					&& message.getEncryption() != Message.ENCRYPTION_PGP
+					&& message.getFileParams().height > 0) {
 				return message;
 					}
 		}
@@ -342,7 +370,7 @@ public class NotificationService {
 	}
 
 	private Message getFirstLocationMessage(final Iterable<Message> messages) {
-		for(final Message message : messages) {
+		for (final Message message : messages) {
 			if (GeoHelper.isGeoUri(message.getBody())) {
 				return message;
 			}
@@ -353,7 +381,7 @@ public class NotificationService {
 	private CharSequence getMergedBodies(final ArrayList<Message> messages) {
 		final StringBuilder text = new StringBuilder();
 		for (int i = 0; i < messages.size(); ++i) {
-			text.append(UIHelper.getMessagePreview(mXmppConnectionService,messages.get(i)).first);
+			text.append(UIHelper.getMessagePreview(mXmppConnectionService, messages.get(i)).first);
 			if (i != messages.size() - 1) {
 				text.append("\n");
 			}
@@ -363,9 +391,9 @@ public class NotificationService {
 
 	private PendingIntent createShowLocationIntent(final Message message) {
 		Iterable<Intent> intents = GeoHelper.createGeoIntentsFromMessage(message);
-		for(Intent intent : intents) {
+		for (Intent intent : intents) {
 			if (intent.resolveActivity(mXmppConnectionService.getPackageManager()) != null) {
-				return PendingIntent.getActivity(mXmppConnectionService,18,intent,PendingIntent.FLAG_UPDATE_CURRENT);
+				return PendingIntent.getActivity(mXmppConnectionService, 18, intent, PendingIntent.FLAG_UPDATE_CURRENT);
 			}
 		}
 		return createOpenConversationsIntent();
@@ -373,7 +401,7 @@ public class NotificationService {
 
 	private PendingIntent createContentIntent(final String conversationUuid, final String downloadMessageUuid) {
 		final TaskStackBuilder stackBuilder = TaskStackBuilder
-			.create(mXmppConnectionService);
+				.create(mXmppConnectionService);
 		stackBuilder.addParentStack(ConversationActivity.class);
 
 		final Intent viewConversationIntent = new Intent(mXmppConnectionService,
@@ -425,30 +453,14 @@ public class NotificationService {
 	}
 
 	private PendingIntent createDisableAccountIntent(final Account account) {
-		final Intent intent = new Intent(mXmppConnectionService,XmppConnectionService.class);
+		final Intent intent = new Intent(mXmppConnectionService, XmppConnectionService.class);
 		intent.setAction(XmppConnectionService.ACTION_DISABLE_ACCOUNT);
-		intent.putExtra("account",account.getJid().toBareJid().toString());
-		return PendingIntent.getService(mXmppConnectionService,0,intent,PendingIntent.FLAG_UPDATE_CURRENT);
-	}
-
-	public boolean wasHighlightedOrPrivate(final Message message) {
-		final String nick = message.getConversation().getMucOptions().getActualNick();
-		final Pattern highlight = generateNickHighlightPattern(nick);
-		if (message.getBody() == null || nick == null) {
-			return false;
-		}
-		final Matcher m = highlight.matcher(message.getBody());
-		return (m.find() || message.getType() == Message.TYPE_PRIVATE);
+		intent.putExtra("account", account.getJid().toBareJid().toString());
+		return PendingIntent.getService(mXmppConnectionService, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
 	}
 
-	private static Pattern generateNickHighlightPattern(final String nick) {
-		// We expect a word boundary, i.e. space or start of string, followed by
-		// the
-		// nick (matched in case-insensitive manner), followed by optional
-		// punctuation (for example "bob: i disagree" or "how are you alice?"),
-		// followed by another word boundary.
-		return Pattern.compile("\\b" + Pattern.quote(nick) + "\\p{Punct}?\\b",
-				Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE);
+	private boolean wasHighlightedOrPrivate(final Message message) {
+		return MessageUtil.wasHighlightedOrPrivate(message);
 	}
 
 	public void setOpenConversation(final Conversation conversation) {
@@ -461,7 +473,7 @@ public class NotificationService {
 
 	private int getPixel(final int dp) {
 		final DisplayMetrics metrics = mXmppConnectionService.getResources()
-			.getDisplayMetrics();
+				.getDisplayMetrics();
 		return ((int) (dp * metrics.density));
 	}
 
@@ -471,7 +483,7 @@ public class NotificationService {
 
 	private boolean inMiniGracePeriod(final Account account) {
 		final int miniGrace = account.getStatus() == Account.State.ONLINE ? Config.MINI_GRACE_PERIOD
-			: Config.MINI_GRACE_PERIOD * 2;
+				: Config.MINI_GRACE_PERIOD * 2;
 		return SystemClock.elapsedRealtime() < (this.mLastNotification + miniGrace);
 	}
 
@@ -479,41 +491,57 @@ public class NotificationService {
 		final NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(mXmppConnectionService);
 
 		mBuilder.setContentTitle(mXmppConnectionService.getString(R.string.conversations_foreground_service));
-		mBuilder.setContentText(mXmppConnectionService.getString(R.string.touch_to_open_conversations));
+		if (Config.SHOW_CONNECTED_ACCOUNTS) {
+			List<Account> accounts = mXmppConnectionService.getAccounts();
+			int enabled = 0;
+			int connected = 0;
+			for (Account account : accounts) {
+				if (account.isOnlineAndConnected()) {
+					connected++;
+					enabled++;
+				} else if (!account.isOptionSet(Account.OPTION_DISABLED)) {
+					enabled++;
+				}
+			}
+			mBuilder.setContentText(mXmppConnectionService.getString(R.string.connected_accounts, connected, enabled));
+		} else {
+			mBuilder.setContentText(mXmppConnectionService.getString(R.string.touch_to_open_conversations));
+		}
 		mBuilder.setContentIntent(createOpenConversationsIntent());
 		mBuilder.setWhen(0);
-		mBuilder.setPriority(NotificationCompat.PRIORITY_MIN);
+		mBuilder.setPriority(Config.SHOW_CONNECTED_ACCOUNTS ? NotificationCompat.PRIORITY_DEFAULT : NotificationCompat.PRIORITY_MIN);
 		final int cancelIcon;
 		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
 			mBuilder.setCategory(Notification.CATEGORY_SERVICE);
-			mBuilder.setSmallIcon(R.drawable.ic_import_export_white_24dp);
 			cancelIcon = R.drawable.ic_cancel_white_24dp;
 		} else {
-			mBuilder.setSmallIcon(R.drawable.ic_stat_communication_import_export);
 			cancelIcon = R.drawable.ic_action_cancel;
 		}
+		mBuilder.setSmallIcon(R.drawable.ic_link_white_24dp);
 		mBuilder.addAction(cancelIcon,
 				mXmppConnectionService.getString(R.string.disable_foreground_service),
 				createDisableForeground());
-		setNotificationColor(mBuilder);
 		return mBuilder.build();
 	}
 
 	private PendingIntent createOpenConversationsIntent() {
-		return PendingIntent.getActivity(mXmppConnectionService, 0, new Intent(mXmppConnectionService,ConversationActivity.class),0);
+		return PendingIntent.getActivity(mXmppConnectionService, 0, new Intent(mXmppConnectionService, ConversationActivity.class), 0);
 	}
 
 	public void updateErrorNotification() {
-		final NotificationManager mNotificationManager = (NotificationManager) mXmppConnectionService.getSystemService(Context.NOTIFICATION_SERVICE);
+		final NotificationManager notificationManager = (NotificationManager) mXmppConnectionService.getSystemService(Context.NOTIFICATION_SERVICE);
 		final List<Account> errors = new ArrayList<>();
 		for (final Account account : mXmppConnectionService.getAccounts()) {
 			if (account.hasErrorStatus()) {
 				errors.add(account);
 			}
 		}
+		if (mXmppConnectionService.getPreferences().getBoolean("keep_foreground_service", false)) {
+			notificationManager.notify(FOREGROUND_NOTIFICATION_ID, createForegroundNotification());
+		}
 		final NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(mXmppConnectionService);
 		if (errors.size() == 0) {
-			mNotificationManager.cancel(ERROR_NOTIFICATION_ID);
+			notificationManager.cancel(ERROR_NOTIFICATION_ID);
 			return;
 		} else if (errors.size() == 1) {
 			mBuilder.setContentTitle(mXmppConnectionService.getString(R.string.problem_connecting_to_account));
@@ -540,12 +568,12 @@ public class NotificationService {
 		final TaskStackBuilder stackBuilder = TaskStackBuilder.create(mXmppConnectionService);
 		stackBuilder.addParentStack(ConversationActivity.class);
 
-		final Intent manageAccountsIntent = new Intent(mXmppConnectionService,ManageAccountActivity.class);
+		final Intent manageAccountsIntent = new Intent(mXmppConnectionService, ManageAccountActivity.class);
 		stackBuilder.addNextIntent(manageAccountsIntent);
 
-		final PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0,PendingIntent.FLAG_UPDATE_CURRENT);
+		final PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
 
 		mBuilder.setContentIntent(resultPendingIntent);
-		mNotificationManager.notify(ERROR_NOTIFICATION_ID, mBuilder.build());
+		notificationManager.notify(ERROR_NOTIFICATION_ID, mBuilder.build());
 	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/services/XmppConnectionService.java b/src/main/java/de/thedevstack/conversationsplus/services/XmppConnectionService.java
index bc982466..df5f72f5 100644
--- a/src/main/java/de/thedevstack/conversationsplus/services/XmppConnectionService.java
+++ b/src/main/java/de/thedevstack/conversationsplus/services/XmppConnectionService.java
@@ -6,11 +6,16 @@ import android.app.PendingIntent;
 import android.app.Service;
 import android.content.Context;
 import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.SharedPreferences;
 import android.database.ContentObserver;
+import android.graphics.Bitmap;
+import android.media.AudioManager;
 import android.net.ConnectivityManager;
 import android.net.NetworkInfo;
 import android.net.Uri;
 import android.os.Binder;
+import android.os.Build;
 import android.os.Bundle;
 import android.os.FileObserver;
 import android.os.IBinder;
@@ -18,7 +23,13 @@ import android.os.Looper;
 import android.os.PowerManager;
 import android.os.PowerManager.WakeLock;
 import android.os.SystemClock;
+import android.preference.PreferenceManager;
 import android.provider.ContactsContract;
+import android.security.KeyChain;
+import android.util.DisplayMetrics;
+import android.util.Log;
+import android.util.LruCache;
+import android.util.Pair;
 
 import net.java.otr4j.OtrException;
 import net.java.otr4j.session.Session;
@@ -26,24 +37,28 @@ import net.java.otr4j.session.SessionID;
 import net.java.otr4j.session.SessionImpl;
 import net.java.otr4j.session.SessionStatus;
 
+import org.openintents.openpgp.IOpenPgpService2;
 import org.openintents.openpgp.util.OpenPgpApi;
 import org.openintents.openpgp.util.OpenPgpServiceConnection;
 
 import java.math.BigInteger;
 import java.security.SecureRandom;
+import java.security.cert.CertificateException;
+import java.security.cert.X509Certificate;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Comparator;
+import java.util.HashMap;
 import java.util.Hashtable;
+import java.util.Iterator;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 import java.util.concurrent.CopyOnWriteArrayList;
 
 import de.duenndns.ssl.MemorizingTrustManager;
-
 import de.thedevstack.android.logcat.Logging;
 import de.thedevstack.conversationsplus.ConversationsPlusApplication;
 import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
@@ -57,16 +72,21 @@ import de.tzur.conversations.Settings;
 import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.R;
 import de.thedevstack.conversationsplus.crypto.PgpEngine;
+import de.thedevstack.conversationsplus.crypto.axolotl.AxolotlService;
+import de.thedevstack.conversationsplus.crypto.axolotl.XmppAxolotlMessage;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Blockable;
 import de.thedevstack.conversationsplus.entities.Bookmark;
 import de.thedevstack.conversationsplus.entities.Contact;
 import de.thedevstack.conversationsplus.entities.Conversation;
-import de.thedevstack.conversationsplus.entities.Transferable;
-import de.thedevstack.conversationsplus.entities.TransferablePlaceholder;
 import de.thedevstack.conversationsplus.entities.Message;
 import de.thedevstack.conversationsplus.entities.MucOptions;
 import de.thedevstack.conversationsplus.entities.MucOptions.OnRenameListener;
+import de.thedevstack.conversationsplus.entities.Presence;
+import de.thedevstack.conversationsplus.entities.Roster;
+import de.thedevstack.conversationsplus.entities.ServiceDiscoveryResult;
+import de.thedevstack.conversationsplus.entities.Transferable;
+import de.thedevstack.conversationsplus.entities.TransferablePlaceholder;
 import de.thedevstack.conversationsplus.generator.IqGenerator;
 import de.thedevstack.conversationsplus.generator.MessageGenerator;
 import de.thedevstack.conversationsplus.generator.PresenceGenerator;
@@ -87,6 +107,7 @@ import de.thedevstack.conversationsplus.xml.Element;
 import de.thedevstack.conversationsplus.xmpp.OnBindListener;
 import de.thedevstack.conversationsplus.xmpp.OnContactStatusChanged;
 import de.thedevstack.conversationsplus.xmpp.OnIqPacketReceived;
+import de.thedevstack.conversationsplus.xmpp.OnKeyStatusUpdated;
 import de.thedevstack.conversationsplus.xmpp.OnMessageAcknowledged;
 import de.thedevstack.conversationsplus.xmpp.OnMessagePacketReceived;
 import de.thedevstack.conversationsplus.xmpp.OnPresencePacketReceived;
@@ -110,9 +131,16 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 
 	public static final String ACTION_CLEAR_NOTIFICATION = "clear_notification";
 	public static final String ACTION_DISABLE_FOREGROUND = "disable_foreground";
-	private static final String ACTION_MERGE_PHONE_CONTACTS = "merge_phone_contacts";
 	public static final String ACTION_TRY_AGAIN = "try_again";
 	public static final String ACTION_DISABLE_ACCOUNT = "disable_account";
+	private static final String ACTION_MERGE_PHONE_CONTACTS = "merge_phone_contacts";
+	public static final String ACTION_GCM_TOKEN_REFRESH = "gcm_token_refresh";
+	public static final String ACTION_GCM_MESSAGE_RECEIVED = "gcm_message_received";
+	private final IBinder mBinder = new XmppConnectionBinder();
+	private final List<Conversation> conversations = new CopyOnWriteArrayList<>();
+	private final IqGenerator mIqGenerator = new IqGenerator();
+	private final List<String> mInProgressAvatarFetches = new ArrayList<>();
+	public DatabaseBackend databaseBackend;
 	private ContentObserver contactObserver = new ContentObserver(null) {
 		@Override
 		public void onChange(boolean selfChange) {
@@ -123,59 +151,29 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 			startService(intent);
 		}
 	};
-
-	private final IBinder mBinder = new XmppConnectionBinder();
-	private final List<Conversation> conversations = new CopyOnWriteArrayList<>();
-	private final FileObserver fileObserver = new FileObserver(
-			FileBackend.getConversationsImageDirectory()) {
-
-		@Override
-		public void onEvent(int event, String path) {
-			if (event == FileObserver.DELETE) {
-				markFileDeleted(path.split("\\.")[0]);
-			}
-		}
-	};
-	private final OnJinglePacketReceived jingleListener = new OnJinglePacketReceived() {
-
-		@Override
-		public void onJinglePacketReceived(Account account, JinglePacket packet) {
-			mJingleConnectionManager.deliverPacket(account, packet);
-		}
-	};
-	private final OnBindListener mOnBindListener = new OnBindListener() {
-
-		@Override
-		public void onBind(final Account account) {
-			account.getRoster().clearPresences();
-			account.pendingConferenceJoins.clear();
-			account.pendingConferenceLeaves.clear();
-			fetchRosterFromServer(account);
-			fetchBookmarks(account);
-			sendPresence(account);
-			connectMultiModeConversations(account);
-			updateConversationUi();
-		}
-	};
-	private final OnMessageAcknowledged mOnMessageAcknowledgedListener = new OnMessageAcknowledged() {
-
+	private MemorizingTrustManager mMemorizingTrustManager;
+	private NotificationService mNotificationService = new NotificationService(
+			this);
+	private OnMessagePacketReceived mMessageParser = new MessageParser(this);
+	private OnPresencePacketReceived mPresenceParser = new PresenceParser(this);
+	private IqParser mIqParser = new IqParser(this);
+	private OnIqPacketReceived mDefaultIqHandler = new OnIqPacketReceived() {
 		@Override
-		public void onMessageAcknowledged(Account account, String uuid) {
-			for (final Conversation conversation : getConversations()) {
-				if (conversation.getAccount() == account) {
-					Message message = conversation.findUnsentMessageWithUuid(uuid);
-					if (message != null) {
-						markMessage(message, Message.STATUS_SEND);
-						if (conversation.setLastMessageTransmitted(System.currentTimeMillis())) {
-							databaseBackend.updateConversation(conversation);
-						}
-					}
+		public void onIqPacketReceived(Account account, IqPacket packet) {
+			if (packet.getType() != IqPacket.TYPE.RESULT) {
+				Element error = packet.findChild("error");
+				String text = error != null ? error.findChildContent("text") : null;
+				if (text != null) {
+					Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": received iq error - " + text);
 				}
 			}
 		}
 	};
-	private final IqGenerator mIqGenerator = new IqGenerator();
-	public DatabaseBackend databaseBackend;
+	private MessageGenerator mMessageGenerator = new MessageGenerator();
+	private PresenceGenerator mPresenceGenerator = new PresenceGenerator();
+	private List<Account> accounts;
+	private JingleConnectionManager mJingleConnectionManager = new JingleConnectionManager(
+			this);
 	public OnContactStatusChanged onContactStatusChanged = new OnContactStatusChanged() {
 
 		@Override
@@ -202,84 +200,128 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 			}
 		}
 	};
-	private MemorizingTrustManager mMemorizingTrustManager;
-	private NotificationService mNotificationService = new NotificationService(
+	private HttpConnectionManager mHttpConnectionManager = new HttpConnectionManager(
 			this);
-	private OnMessagePacketReceived mMessageParser = new MessageParser(this);
-	private OnPresencePacketReceived mPresenceParser = new PresenceParser(this);
-	private IqParser mIqParser = new IqParser(this);
-	private OnIqPacketReceived mDefaultIqHandler = new OnIqPacketReceived() {
+	private MessageArchiveService mMessageArchiveService = new MessageArchiveService(this);
+	private PushManagementService mPushManagementService = new PushManagementService(this);
+	private OnConversationUpdate mOnConversationUpdate = null;
+	private final FileObserver fileObserver = new FileObserver(
+			FileBackend.getConversationsImageDirectory()) {
+
 		@Override
-		public void onIqPacketReceived(Account account, IqPacket packet) {
-			if (packet.getType() == IqPacket.TYPE.ERROR) {
-				Element error = packet.findChild("error");
-				String text = error != null ? error.findChildContent("text") : null;
-				if (text != null) {
-					Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": received iq error - "+text);
+		public void onEvent(int event, String path) {
+			if (event == FileObserver.DELETE) {
+				markFileDeleted(path.split("\\.")[0]);
+			}
+		}
+	};
+	private final OnJinglePacketReceived jingleListener = new OnJinglePacketReceived() {
+
+		@Override
+		public void onJinglePacketReceived(Account account, JinglePacket packet) {
+			mJingleConnectionManager.deliverPacket(account, packet);
+		}
+	};
+	private final OnMessageAcknowledged mOnMessageAcknowledgedListener = new OnMessageAcknowledged() {
+
+		@Override
+		public void onMessageAcknowledged(Account account, String uuid) {
+			for (final Conversation conversation : getConversations()) {
+				if (conversation.getAccount() == account) {
+					Message message = conversation.findUnsentMessageWithUuid(uuid);
+					if (message != null) {
+						markMessage(message, Message.STATUS_SEND);
+					}
 				}
 			}
 		}
 	};
-	private MessageGenerator mMessageGenerator = new MessageGenerator();
-	private PresenceGenerator mPresenceGenerator = new PresenceGenerator();
-	private List<Account> accounts;
-	private JingleConnectionManager mJingleConnectionManager = new JingleConnectionManager(
-			this);
-	private HttpConnectionManager mHttpConnectionManager = new HttpConnectionManager(
-			this);
-	private MessageArchiveService mMessageArchiveService = new MessageArchiveService(this);
-	private OnConversationUpdate mOnConversationUpdate = null;
 	private int convChangedListenerCount = 0;
 	private OnShowErrorToast mOnShowErrorToast = null;
 	private int showErrorToastListenerCount = 0;
 	private int unreadCount = -1;
 	private OnAccountUpdate mOnAccountUpdate = null;
+	private OnCaptchaRequested mOnCaptchaRequested = null;
+	private int accountChangedListenerCount = 0;
+	private int captchaRequestedListenerCount = 0;
+	private OnRosterUpdate mOnRosterUpdate = null;
+	private OnUpdateBlocklist mOnUpdateBlocklist = null;
+	private int updateBlocklistListenerCount = 0;
+	private int rosterChangedListenerCount = 0;
+	private OnMucRosterUpdate mOnMucRosterUpdate = null;
+	private int mucRosterChangedListenerCount = 0;
+	private OnKeyStatusUpdated mOnKeyStatusUpdated = null;
+	private int keyStatusUpdatedListenerCount = 0;
+	private SecureRandom mRandom;
+	private LruCache<Pair<String,String>,ServiceDiscoveryResult> discoCache = new LruCache<>(20);
+	private final OnBindListener mOnBindListener = new OnBindListener() {
+
+		@Override
+		public void onBind(final Account account) {
+			account.getRoster().clearPresences();
+			mJingleConnectionManager.cancelInTransmission();
+			fetchRosterFromServer(account);
+			fetchBookmarks(account);
+			sendPresence(account);
+			if (mPushManagementService.available(account)) {
+				mPushManagementService.registerPushTokenOnServer(account);
+			}
+			connectMultiModeConversations(account);
+			syncDirtyContacts(account);
+		}
+	};
 	private OnStatusChanged statusListener = new OnStatusChanged() {
 
 		@Override
-		public void onStatusChanged(Account account) {
+		public void onStatusChanged(final Account account) {
 			XmppConnection connection = account.getXmppConnection();
 			if (mOnAccountUpdate != null) {
 				mOnAccountUpdate.onAccountUpdate();
 			}
 			if (account.getStatus() == Account.State.ONLINE) {
-				for (Conversation conversation : account.pendingConferenceLeaves) {
-					leaveMuc(conversation);
-				}
-				for (Conversation conversation : account.pendingConferenceJoins) {
-					joinMuc(conversation);
-				}
 				mMessageArchiveService.executePendingQueries(account);
-				mJingleConnectionManager.cancelInTransmission();
-				List<Conversation> conversations = getConversations();
-				for (Conversation conversation : conversations) {
-					if (conversation.getAccount() == account) {
-						conversation.startOtrIfNeeded();
-						sendUnsentMessages(conversation);
-					}
-				}
 				if (connection != null && connection.getFeatures().csi()) {
 					if (checkListeners()) {
-						Logging.d(Config.LOGTAG, account.getJid().toBareJid()
-								+ " sending csi//inactive");
+						Logging.d(Config.LOGTAG, account.getJid().toBareJid() + " sending csi//inactive");
 						connection.sendInactive();
 					} else {
-						Logging.d(Config.LOGTAG, account.getJid().toBareJid()
-								+ " sending csi//active");
+						Logging.d(Config.LOGTAG, account.getJid().toBareJid() + " sending csi//active");
 						connection.sendActive();
 					}
 				}
-				syncDirtyContacts(account);
-				scheduleWakeUpCall(Config.PING_MAX_INTERVAL,account.getUuid().hashCode());
+				List<Conversation> conversations = getConversations();
+				for (Conversation conversation : conversations) {
+					if (conversation.getAccount() == account
+							&& !account.pendingConferenceJoins.contains(conversation)) {
+						if (!conversation.startOtrIfNeeded()) {
+							Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": couldn't start OTR with "+conversation.getContact().getJid()+" when needed");
+						}
+						sendUnsentMessages(conversation);
+					}
+				}
+				for (Conversation conversation : account.pendingConferenceLeaves) {
+					leaveMuc(conversation);
+				}
+				account.pendingConferenceLeaves.clear();
+				for (Conversation conversation : account.pendingConferenceJoins) {
+					joinMuc(conversation);
+				}
+				account.pendingConferenceJoins.clear();
+				scheduleWakeUpCall(Config.PING_MAX_INTERVAL, account.getUuid().hashCode());
 			} else if (account.getStatus() == Account.State.OFFLINE) {
 				resetSendingToWaiting(account);
-				if (!account.isOptionSet(Account.OPTION_DISABLED)) {
-					int timeToReconnect = mRandom.nextInt(50) + 10;
-					scheduleWakeUpCall(timeToReconnect,account.getUuid().hashCode());
+				final boolean disabled = account.isOptionSet(Account.OPTION_DISABLED);
+				final boolean pushMode = Config.CLOSE_TCP_WHEN_SWITCHING_TO_BACKGROUND
+						&& mPushManagementService.available(account)
+						&& checkListeners();
+				Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": push mode "+Boolean.toString(pushMode));
+				if (!disabled && !pushMode) {
+					int timeToReconnect = mRandom.nextInt(20) + 10;
+					scheduleWakeUpCall(timeToReconnect, account.getUuid().hashCode());
 				}
 			} else if (account.getStatus() == Account.State.REGISTRATION_SUCCESSFUL) {
 				databaseBackend.updateAccount(account);
-				reconnectAccount(account, true);
+				reconnectAccount(account, true, false);
 			} else if ((account.getStatus() != Account.State.CONNECTING)
 					&& (account.getStatus() != Account.State.NO_INTERNET)) {
 				if (connection != null) {
@@ -288,53 +330,49 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 							+ ": error connecting account. try again in "
 							+ next + "s for the "
 							+ (connection.getAttempt() + 1) + " time");
-					scheduleWakeUpCall(next,account.getUuid().hashCode());
+					scheduleWakeUpCall(next, account.getUuid().hashCode());
 				}
-					}
+			}
 			getNotificationService().updateErrorNotification();
 		}
 	};
-	private int accountChangedListenerCount = 0;
-	private OnRosterUpdate mOnRosterUpdate = null;
-	private OnUpdateBlocklist mOnUpdateBlocklist = null;
-	private int updateBlocklistListenerCount = 0;
-	private int rosterChangedListenerCount = 0;
-	private OnMucRosterUpdate mOnMucRosterUpdate = null;
-	private int mucRosterChangedListenerCount = 0;
-	private SecureRandom mRandom;
 	private OpenPgpServiceConnection pgpServiceConnection;
 	private PgpEngine mPgpEngine = null;
 	private WakeLock wakeLock;
 	private PowerManager pm;
+	private LruCache<String, Bitmap> mBitmapCache;
 	private Thread mPhoneContactMergerThread;
+	private EventReceiver mEventReceiver = new EventReceiver();
 
 	private boolean mRestoredFromDatabase = false;
+
 	public boolean areMessagesInitialized() {
 		return this.mRestoredFromDatabase;
 	}
 
 	public PgpEngine getPgpEngine() {
-		if (pgpServiceConnection.isBound()) {
+		if (!Config.supportOpenPgp()) {
+			return null;
+		} else if (pgpServiceConnection != null && pgpServiceConnection.isBound()) {
 			if (this.mPgpEngine == null) {
 				this.mPgpEngine = new PgpEngine(new OpenPgpApi(
-							getApplicationContext(),
-							pgpServiceConnection.getService()), this);
+						getApplicationContext(),
+						pgpServiceConnection.getService()), this);
 			}
 			return mPgpEngine;
 		} else {
 			return null;
 		}
-
 	}
 
 	public void attachLocationToConversation(final Conversation conversation,
 											 final Uri uri,
 											 final UiCallback<Message> callback) {
-		int encryption = conversation.getNextEncryption(ConversationsPlusPreferences.forceEncryption());
+		int encryption = conversation.getNextEncryption();
 		if (encryption == Message.ENCRYPTION_PGP) {
 			encryption = Message.ENCRYPTION_DECRYPTED;
 		}
-		Message message = new Message(conversation,uri.toString(),encryption);
+		Message message = new Message(conversation, uri.toString(), encryption);
 		if (conversation.getNextCounterpart() != null) {
 			message.setCounterpart(conversation.getNextCounterpart());
 		}
@@ -346,16 +384,13 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 	}
 
 	public void attachFileToConversation(final Conversation conversation,
-			final Uri uri,
-			final UiCallback<Message> callback) {
+										 final Uri uri,
+										 final UiCallback<Message> callback) {
 		final Message message;
-		boolean forceEncryption = ConversationsPlusPreferences.forceEncryption();
-		if (conversation.getNextEncryption(forceEncryption) == Message.ENCRYPTION_PGP) {
-			message = new Message(conversation, "",
-					Message.ENCRYPTION_DECRYPTED);
+		if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP) {
+			message = new Message(conversation, "", Message.ENCRYPTION_DECRYPTED);
 		} else {
-			message = new Message(conversation, "",
-					conversation.getNextEncryption(forceEncryption));
+			message = new Message(conversation, "", conversation.getNextEncryption());
 		}
 		message.setCounterpart(conversation.getNextCounterpart());
 		message.setType(Message.TYPE_FILE);
@@ -388,7 +423,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		}
 	}
 
-    public Conversation find(Bookmark bookmark) {
+	public Conversation find(Bookmark bookmark) {
 		return find(bookmark.getAccount(), bookmark.getJid());
 	}
 
@@ -399,6 +434,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 	@Override
 	public int onStartCommand(Intent intent, int flags, int startId) {
 		final String action = intent == null ? null : intent.getAction();
+		boolean interactive = false;
 		if (action != null) {
 			switch (action) {
 				case ConnectivityManager.CONNECTIVITY_ACTION:
@@ -408,9 +444,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 					break;
 				case ACTION_MERGE_PHONE_CONTACTS:
 					if (mRestoredFromDatabase) {
-						PhoneHelper.loadPhoneContacts(getApplicationContext(),
-								new CopyOnWriteArrayList<Bundle>(),
-								this);
+						loadPhoneContacts();
 					}
 					return START_STICKY;
 				case Intent.ACTION_SHUTDOWN:
@@ -425,19 +459,36 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 					break;
 				case ACTION_TRY_AGAIN:
 					resetAllAttemptCounts(false);
+					interactive = true;
 					break;
 				case ACTION_DISABLE_ACCOUNT:
 					try {
 						String jid = intent.getStringExtra("account");
 						Account account = jid == null ? null : findAccountByJid(Jid.fromString(jid));
 						if (account != null) {
-							account.setOption(Account.OPTION_DISABLED,true);
+							account.setOption(Account.OPTION_DISABLED, true);
 							updateAccount(account);
 						}
 					} catch (final InvalidJidException ignored) {
 						break;
 					}
 					break;
+				case AudioManager.RINGER_MODE_CHANGED_ACTION:
+					if (xaOnSilentMode()) {
+						refreshAllPresences();
+					}
+					break;
+				case Intent.ACTION_SCREEN_OFF:
+				case Intent.ACTION_SCREEN_ON:
+					if (awayWhenScreenOff()) {
+						refreshAllPresences();
+					}
+					break;
+				case ACTION_GCM_TOKEN_REFRESH:
+					refreshAllGcmTokens();
+					break;
+				case ACTION_GCM_MESSAGE_RECEIVED:
+					Log.d(Config.LOGTAG,"gcm push message arrived in service. extras="+intent.getExtras());
 			}
 		}
 		this.wakeLock.acquire();
@@ -460,36 +511,42 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 						long lastReceived = account.getXmppConnection().getLastPacketReceived();
 						long lastSent = account.getXmppConnection().getLastPingSent();
 						long pingInterval = "ui".equals(action) ? Config.PING_MIN_INTERVAL * 1000 : Config.PING_MAX_INTERVAL * 1000;
-						long msToNextPing = (Math.max(lastReceived,lastSent) + pingInterval) - SystemClock.elapsedRealtime();
+						long msToNextPing = (Math.max(lastReceived, lastSent) + pingInterval) - SystemClock.elapsedRealtime();
 						long pingTimeoutIn = (lastSent + Config.PING_TIMEOUT * 1000) - SystemClock.elapsedRealtime();
 						if (lastSent > lastReceived) {
 							if (pingTimeoutIn < 0) {
 								Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": ping timeout");
-								this.reconnectAccount(account, true);
+								this.reconnectAccount(account, true, interactive);
 							} else {
 								int secs = (int) (pingTimeoutIn / 1000);
-								this.scheduleWakeUpCall(secs,account.getUuid().hashCode());
+								this.scheduleWakeUpCall(secs, account.getUuid().hashCode());
 							}
 						} else if (msToNextPing <= 0) {
 							account.getXmppConnection().sendPing();
-							Logging.d(Config.LOGTAG, account.getJid().toBareJid()+" send ping");
-							this.scheduleWakeUpCall(Config.PING_TIMEOUT,account.getUuid().hashCode());
+							Logging.d(Config.LOGTAG, account.getJid().toBareJid() + " send ping");
+							this.scheduleWakeUpCall(Config.PING_TIMEOUT, account.getUuid().hashCode());
 						} else {
 							this.scheduleWakeUpCall((int) (msToNextPing / 1000), account.getUuid().hashCode());
 						}
 					} else if (account.getStatus() == Account.State.OFFLINE) {
-						reconnectAccount(account,true);
+						reconnectAccount(account, true, interactive);
 					} else if (account.getStatus() == Account.State.CONNECTING) {
-						long timeout = Config.CONNECT_TIMEOUT - ((SystemClock.elapsedRealtime() - account.getXmppConnection().getLastConnect()) / 1000);
+						long secondsSinceLastConnect = (SystemClock.elapsedRealtime() - account.getXmppConnection().getLastConnect()) / 1000;
+						long secondsSinceLastDisco = (SystemClock.elapsedRealtime() - account.getXmppConnection().getLastDiscoStarted()) / 1000;
+						long discoTimeout = Config.CONNECT_DISCO_TIMEOUT - secondsSinceLastDisco;
+						long timeout = Config.CONNECT_TIMEOUT - secondsSinceLastConnect;
 						if (timeout < 0) {
 							Logging.d(Config.LOGTAG, account.getJid() + ": time out during connect reconnecting");
-							reconnectAccount(account, true);
+							reconnectAccount(account, true, interactive);
+						} else if (discoTimeout < 0) {
+							account.getXmppConnection().sendDiscoTimeout();
+							scheduleWakeUpCall((int) Math.min(timeout,discoTimeout), account.getUuid().hashCode());
 						} else {
-							scheduleWakeUpCall((int) timeout,account.getUuid().hashCode());
+							scheduleWakeUpCall((int) Math.min(timeout,discoTimeout), account.getUuid().hashCode());
 						}
 					} else {
 						if (account.getXmppConnection().getTimeToNextAttempt() <= 0) {
-							reconnectAccount(account, true);
+							reconnectAccount(account, true, interactive);
 						}
 					}
 
@@ -499,10 +556,6 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 				}
 			}
 		}
-		/*PowerManager pm = (PowerManager) this.getSystemService(Context.POWER_SERVICE);
-			if (!pm.isScreenOn()) {
-			removeStaleListeners();
-			}*/
 		if (wakeLock.isHeld()) {
 			try {
 				wakeLock.release();
@@ -512,9 +565,46 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		return START_STICKY;
 	}
 
+	private boolean xaOnSilentMode() {
+		return getPreferences().getBoolean("xa_on_silent_mode", false);
+	}
+
+	private boolean awayWhenScreenOff() {
+		return getPreferences().getBoolean("away_when_screen_off", false);
+	}
+
+	private Presence.Status getTargetPresence() {
+		if (xaOnSilentMode() && isPhoneSilenced()) {
+			return Presence.Status.XA;
+		} else if (awayWhenScreenOff() && !isInteractive()) {
+			return Presence.Status.AWAY;
+		} else {
+			return Presence.Status.ONLINE;
+		}
+	}
+
+	@SuppressLint("NewApi")
+	@SuppressWarnings("deprecation")
+	public boolean isInteractive() {
+		final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
+
+		final boolean isScreenOn;
+		if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
+			isScreenOn = pm.isScreenOn();
+		} else {
+			isScreenOn = pm.isInteractive();
+		}
+		return isScreenOn;
+	}
+
+	private boolean isPhoneSilenced() {
+		AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
+		return audioManager.getRingerMode() == AudioManager.RINGER_MODE_SILENT;
+	}
+
 	private void resetAllAttemptCounts(boolean reallyAll) {
 		Logging.d(Config.LOGTAG, "resetting all attepmt counts");
-		for(Account account : accounts) {
+		for (Account account : accounts) {
 			if (account.hasErrorStatus() || reallyAll) {
 				final XmppConnection connection = account.getXmppConnection();
 				if (connection != null) {
@@ -526,7 +616,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 
 	public boolean hasInternetConnection() {
 		ConnectivityManager cm = (ConnectivityManager) getApplicationContext()
-			.getSystemService(Context.CONNECTIVITY_SERVICE);
+				.getSystemService(Context.CONNECTIVITY_SERVICE);
 		NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
 		return activeNetwork != null && activeNetwork.isConnected();
 	}
@@ -557,25 +647,80 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		PRNGFixes.apply();
 		this.mRandom = new SecureRandom();
 		updateMemorizingTrustmanager();
+		final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
+		final int cacheSize = maxMemory / 8;
+		this.mBitmapCache = new LruCache<String, Bitmap>(cacheSize) {
+			@Override
+			protected int sizeOf(final String key, final Bitmap bitmap) {
+				return bitmap.getByteCount() / 1024;
+			}
+		};
 
 		this.databaseBackend = DatabaseBackend.getInstance(getApplicationContext());
 		this.accounts = databaseBackend.getAccounts();
 
-		for (final Account account : this.accounts) {
-			account.initAccountServices(this);
-		}
 		restoreFromDatabase();
 
 		getContentResolver().registerContentObserver(ContactsContract.Contacts.CONTENT_URI, true, contactObserver);
 		this.fileObserver.startWatching();
-		this.pgpServiceConnection = new OpenPgpServiceConnection(getApplicationContext(), "org.sufficientlysecure.keychain");
-		this.pgpServiceConnection.bindToService();
+
+		if (Config.supportOpenPgp()) {
+			this.pgpServiceConnection = new OpenPgpServiceConnection(getApplicationContext(), "org.sufficientlysecure.keychain", new OpenPgpServiceConnection.OnBound() {
+				@Override
+				public void onBound(IOpenPgpService2 service) {
+					for (Account account : accounts) {
+						if (account.getPgpDecryptionService() != null) {
+							account.getPgpDecryptionService().onOpenPgpServiceBound();
+						}
+					}
+				}
+
+				@Override
+				public void onError(Exception e) {
+				}
+			});
+			this.pgpServiceConnection.bindToService();
+		}
 
 		this.pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
-		this.wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,"XmppConnectionService");
+		this.wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "XmppConnectionService");
 		toggleForegroundService();
 		updateUnreadCountBadge();
         UiUpdateHelper.initXmppConnectionService(this);
+		toggleScreenEventReceiver();
+	}
+
+	@Override
+	public void onTrimMemory(int level) {
+		super.onTrimMemory(level);
+		if (level >= TRIM_MEMORY_COMPLETE) {
+			Log.d(Config.LOGTAG, "clear cache due to low memory");
+			getBitmapCache().evictAll();
+		}
+	}
+
+	@Override
+	public void onDestroy() {
+		try {
+			unregisterReceiver(this.mEventReceiver);
+		} catch (IllegalArgumentException e) {
+			//ignored
+		}
+		super.onDestroy();
+	}
+
+	public void toggleScreenEventReceiver() {
+		if (awayWhenScreenOff()) {
+			final IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
+			filter.addAction(Intent.ACTION_SCREEN_OFF);
+			registerReceiver(this.mEventReceiver, filter);
+		} else {
+			try {
+				unregisterReceiver(this.mEventReceiver);
+			} catch (IllegalArgumentException e) {
+				//ignored
+			}
+		}
 	}
 
 	public void toggleForegroundService() {
@@ -598,19 +743,27 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		for (final Account account : accounts) {
 			databaseBackend.writeRoster(account.getRoster());
 			if (account.getXmppConnection() != null) {
-				disconnect(account, false);
+				new Thread(new Runnable() {
+					@Override
+					public void run() {
+						disconnect(account, false);
+					}
+				}).start();
+				cancelWakeUpCall(account.getUuid().hashCode());
 			}
 		}
-		Context context = getApplicationContext();
-		AlarmManager alarmManager = (AlarmManager) context
-				.getSystemService(Context.ALARM_SERVICE);
-		Intent intent = new Intent(context, EventReceiver.class);
-		alarmManager.cancel(PendingIntent.getBroadcast(context, 0, intent, 0));
 		Logging.d(Config.LOGTAG, "good bye");
 		stopSelf();
 	}
 
-	protected void scheduleWakeUpCall(int seconds, int requestCode) {
+	private void cancelWakeUpCall(int requestCode) {
+		final AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
+		final Intent intent = new Intent(this, EventReceiver.class);
+		intent.setAction("ping");
+		alarmManager.cancel(PendingIntent.getBroadcast(this, requestCode, intent, 0));
+	}
+
+	public void scheduleWakeUpCall(int seconds, int requestCode) {
 		final long timeToWake = SystemClock.elapsedRealtime() + (seconds < 0 ? 1 : seconds + 1) * 1000;
 
 		Context context = getApplicationContext();
@@ -633,6 +786,10 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		connection.setOnBindListener(this.mOnBindListener);
 		connection.setOnMessageAcknowledgeListener(this.mOnMessageAcknowledgedListener);
 		connection.addOnAdvancedStreamFeaturesAvailableListener(this.mMessageArchiveService);
+		AxolotlService axolotlService = account.getAxolotlService();
+		if (axolotlService != null) {
+			connection.addOnAdvancedStreamFeaturesAvailableListener(axolotlService);
+		}
 		return connection;
 	}
 
@@ -643,37 +800,41 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		}
 	}
 
-	private void sendFileMessage(final Message message) {
+	private void sendFileMessage(final Message message, final boolean delay) {
 		Logging.d(Config.LOGTAG, "send file message");
 		final Account account = message.getConversation().getAccount();
 		final XmppConnection connection = account.getXmppConnection();
 		if (connection != null && connection.getFeatures().httpUpload()) {
-			mHttpConnectionManager.createNewUploadConnection(message);
+			mHttpConnectionManager.createNewUploadConnection(message, delay);
 		} else {
 			mJingleConnectionManager.createNewConnection(message);
 		}
 	}
 
 	public void sendMessage(final Message message) {
-		sendMessage(message, false);
+		sendMessage(message, false, false);
 	}
 
-	private void sendMessage(final Message message, final boolean resend) {
+	private void sendMessage(final Message message, final boolean resend, final boolean delay) {
 		final Account account = message.getConversation().getAccount();
 		final Conversation conversation = message.getConversation();
 		account.deactivateGracePeriod();
 		MessagePacket packet = null;
-		boolean saveInDb = true;
+		final boolean addToConversation = (conversation.getMode() != Conversation.MODE_MULTI
+				|| account.getServerIdentity() != XmppConnection.Identity.SLACK)
+				&& !message.edited();
+		boolean saveInDb = addToConversation;
 		message.setStatus(Message.STATUS_WAITING);
 
 		if (!resend && message.getEncryption() != Message.ENCRYPTION_OTR) {
 			message.getConversation().endOtrIfNeeded();
-			message.getConversation().findUnsentMessagesWithOtrEncryption(new Conversation.OnMessageFound() {
-				@Override
-				public void onMessageFound(Message message) {
-					markMessage(message,Message.STATUS_SEND_FAILED);
-				}
-			});
+			message.getConversation().findUnsentMessagesWithEncryption(Message.ENCRYPTION_OTR,
+					new Conversation.OnMessageFound() {
+						@Override
+						public void onMessageFound(Message message) {
+							markMessage(message, Message.STATUS_SEND_FAILED);
+						}
+					});
 		}
 
 		if (account.isOnlineAndConnected()) {
@@ -681,24 +842,24 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 				case Message.ENCRYPTION_NONE:
 					if (message.needsUploading()) {
 						if (account.httpUploadAvailable() || message.fixCounterpart()) {
-							this.sendFileMessage(message);
+							this.sendFileMessage(message, delay);
 						} else {
 							break;
 						}
 					} else {
-						packet = mMessageGenerator.generateChat(message,resend);
+						packet = mMessageGenerator.generateChat(message);
 					}
 					break;
 				case Message.ENCRYPTION_PGP:
 				case Message.ENCRYPTION_DECRYPTED:
 					if (message.needsUploading()) {
 						if (account.httpUploadAvailable() || message.fixCounterpart()) {
-							this.sendFileMessage(message);
+							this.sendFileMessage(message, delay);
 						} else {
 							break;
 						}
 					} else {
-						packet = mMessageGenerator.generatePgpChat(message,resend);
+						packet = mMessageGenerator.generatePgpChat(message);
 					}
 					break;
 				case Message.ENCRYPTION_OTR:
@@ -712,16 +873,37 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 						if (message.needsUploading()) {
 							mJingleConnectionManager.createNewConnection(message);
 						} else {
-							packet = mMessageGenerator.generateOtrChat(message,resend);
+							packet = mMessageGenerator.generateOtrChat(message);
 						}
 					} else if (otrSession == null) {
 						if (message.fixCounterpart()) {
 							conversation.startOtrSession(message.getCounterpart().getResourcepart(), true);
 						} else {
+							Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": could not fix counterpart for OTR message to contact "+message.getContact().getJid());
 							break;
 						}
+					} else {
+						Logging.d(Config.LOGTAG,account.getJid().toBareJid()+" OTR session with "+message.getContact()+" is in wrong state: "+otrSession.getSessionStatus().toString());
+					}
+					break;
+				case Message.ENCRYPTION_AXOLOTL:
+					message.setAxolotlFingerprint(account.getAxolotlService().getOwnFingerprint());
+					if (message.needsUploading()) {
+						if (account.httpUploadAvailable() || message.fixCounterpart()) {
+							this.sendFileMessage(message, delay);
+						} else {
+							break;
+						}
+					} else {
+						XmppAxolotlMessage axolotlMessage = account.getAxolotlService().fetchAxolotlMessageFromCache(message);
+						if (axolotlMessage == null) {
+							account.getAxolotlService().preparePayloadMessage(message, delay);
+						} else {
+							packet = mMessageGenerator.generateAxolotlChat(message, axolotlMessage);
+						}
 					}
 					break;
+
 			}
 			if (packet != null) {
 				if (account.getXmppConnection().getFeatures().sm() || conversation.getMode() == Conversation.MODE_MULTI) {
@@ -731,7 +913,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 				}
 			}
 		} else {
-			switch(message.getEncryption()) {
+			switch (message.getEncryption()) {
 				case Message.ENCRYPTION_DECRYPTED:
 					if (!message.needsUploading()) {
 						String pgpBody = message.getEncryptedBody();
@@ -746,28 +928,41 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 					break;
 				case Message.ENCRYPTION_OTR:
 					if (!conversation.hasValidOtrSession() && message.getCounterpart() != null) {
+						Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": create otr session without starting for "+message.getContact().getJid());
 						conversation.startOtrSession(message.getCounterpart().getResourcepart(), false);
 					}
 					break;
+				case Message.ENCRYPTION_AXOLOTL:
+					message.setAxolotlFingerprint(account.getAxolotlService().getOwnFingerprint());
+					break;
 			}
 		}
 
 		if (resend) {
-			if (packet != null) {
+			if (packet != null && addToConversation) {
 				if (account.getXmppConnection().getFeatures().sm() || conversation.getMode() == Conversation.MODE_MULTI) {
-					markMessage(message,Message.STATUS_UNSEND);
+					markMessage(message, Message.STATUS_UNSEND);
 				} else {
-					markMessage(message,Message.STATUS_SEND);
+					markMessage(message, Message.STATUS_SEND);
 				}
 			}
 		} else {
-			conversation.add(message);
-			if (saveInDb && (message.getEncryption() == Message.ENCRYPTION_NONE || !ConversationsPlusPreferences.dontSaveEncrypted())) {
-				databaseBackend.createMessage(message);
+			if (addToConversation) {
+				conversation.add(message);
+			}
+			if (message.getEncryption() == Message.ENCRYPTION_NONE || saveEncryptedMessages()) {
+				if (saveInDb) {
+					databaseBackend.createMessage(message);
+				} else if (message.edited()) {
+					databaseBackend.updateMessage(message, message.getEditedId());
+				}
 			}
 			updateConversationUi();
 		}
 		if (packet != null) {
+			if (delay) {
+				mMessageGenerator.addDelay(packet, message.getTimeSent());
+			}
 			if (conversation.setOutgoingChatState(Config.DEFAULT_CHATSTATE)) {
 				if (ConversationsPlusPreferences.chatStates()) {
 					packet.addChild(ChatState.toElement(conversation.getOutgoingChatState()));
@@ -782,13 +977,13 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 
 			@Override
 			public void onMessageFound(Message message) {
-				resendMessage(message);
+				resendMessage(message, true);
 			}
 		});
 	}
 
-	public void resendMessage(final Message message) {
-		sendMessage(message, true);
+	public void resendMessage(final Message message, final boolean delay) {
+		sendMessage(message, true, delay);
 	}
 
 	public void fetchRosterFromServer(final Account account) {
@@ -811,34 +1006,42 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 
 			@Override
 			public void onIqPacketReceived(final Account account, final IqPacket packet) {
-				final Element query = packet.query();
-				final List<Bookmark> bookmarks = new CopyOnWriteArrayList<>();
-				final Element storage = query.findChild("storage",
-						"storage:bookmarks");
-				if (storage != null) {
-					for (final Element item : storage.getChildren()) {
-						if (item.getName().equals("conference")) {
-							final Bookmark bookmark = Bookmark.parse(item, account);
-							bookmarks.add(bookmark);
-							Conversation conversation = find(bookmark);
-							if (conversation != null) {
-								conversation.setBookmark(bookmark);
-							} else if (bookmark.autojoin() && bookmark.getJid() != null) {
-								conversation = findOrCreateConversation(
-										account, bookmark.getJid(), true);
-								conversation.setBookmark(bookmark);
-								joinMuc(conversation);
+				if (packet.getType() == IqPacket.TYPE.RESULT) {
+					final Element query = packet.query();
+					final HashMap<Jid, Bookmark> bookmarks = new HashMap<>();
+					final Element storage = query.findChild("storage", "storage:bookmarks");
+					final boolean autojoin = respectAutojoin();
+					if (storage != null) {
+						for (final Element item : storage.getChildren()) {
+							if (item.getName().equals("conference")) {
+								final Bookmark bookmark = Bookmark.parse(item, account);
+								Bookmark old = bookmarks.put(bookmark.getJid(), bookmark);
+								if (old != null && old.getBookmarkName() != null && bookmark.getBookmarkName() == null) {
+									bookmark.setBookmarkName(old.getBookmarkName());
+								}
+								Conversation conversation = find(bookmark);
+								if (conversation != null) {
+									conversation.setBookmark(bookmark);
+								} else if (bookmark.autojoin() && bookmark.getJid() != null && autojoin) {
+									conversation = findOrCreateConversation(
+											account, bookmark.getJid(), true);
+									conversation.setBookmark(bookmark);
+									joinMuc(conversation);
+								}
 							}
 						}
 					}
+					account.setBookmarks(new ArrayList<>(bookmarks.values()));
+				} else {
+					Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not fetch bookmarks");
 				}
-				account.setBookmarks(bookmarks);
 			}
 		};
 		sendIqPacket(account, iqPacket, callback);
 	}
 
 	public void pushBookmarks(Account account) {
+		Logging.d(Config.LOGTAG, account.getJid().toBareJid()+": pushing bookmarks");
 		IqPacket iqPacket = new IqPacket(IqPacket.TYPE.SET);
 		Element query = iqPacket.query("jabber:iq:private");
 		Element storage = query.addChild("storage", "storage:bookmarks");
@@ -855,7 +1058,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		mPhoneContactMergerThread = new Thread(new Runnable() {
 			@Override
 			public void run() {
-				Logging.d(Config.LOGTAG,"start merging phone contacts with roster");
+				Logging.d(Config.LOGTAG, "start merging phone contacts with roster");
 				for (Account account : accounts) {
 					List<Contact> withSystemAccounts = account.getRoster().getWithSystemAccounts();
 					for (Bundle phoneContact : phoneContacts) {
@@ -871,8 +1074,8 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 						}
 						final Contact contact = account.getRoster().getContact(jid);
 						String systemAccount = phoneContact.getInt("phoneid")
-							+ "#"
-							+ phoneContact.getString("lookup");
+								+ "#"
+								+ phoneContact.getString("lookup");
 						contact.setSystemAccount(systemAccount);
 						if (contact.setPhotoUri(phoneContact.getString("photouri"))) {
                             AvatarService.getInstance().clear(contact);
@@ -880,7 +1083,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 						contact.setSystemName(phoneContact.getString("displayname"));
 						withSystemAccounts.remove(contact);
 					}
-					for(Contact contact : withSystemAccounts) {
+					for (Contact contact : withSystemAccounts) {
 						contact.setSystemAccount(null);
 						contact.setSystemName(null);
 						if (contact.setPhotoUri(null)) {
@@ -906,23 +1109,29 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 				Account account = accountLookupTable.get(conversation.getAccountUuid());
 				conversation.setAccount(account);
 			}
-			Runnable runnable =new Runnable() {
+			Runnable runnable = new Runnable() {
 				@Override
 				public void run() {
-					Logging.d(Config.LOGTAG,"restoring roster");
-					for(Account account : accounts) {
+					Logging.d(Config.LOGTAG, "restoring roster");
+					for (Account account : accounts) {
 						databaseBackend.readRoster(account.getRoster());
+						account.initAccountServices(XmppConnectionService.this); //roster needs to be loaded at this stage
 					}
 					ImageUtil.evictBitmapCache();
 					Looper.prepare();
-					PhoneHelper.loadPhoneContacts(getApplicationContext(),
-							new CopyOnWriteArrayList<Bundle>(),
-							XmppConnectionService.this);
-					Logging.d(Config.LOGTAG,"restoring messages");
+					loadPhoneContacts();
+					Logging.d(Config.LOGTAG, "restoring messages");
 					for (Conversation conversation : conversations) {
 						conversation.addAll(0, databaseBackend.getMessages(conversation, Config.PAGE_SIZE));
 						checkDeletedFiles(conversation);
+						conversation.findUnreadMessages(new Conversation.OnMessageFound() {
+							@Override
+							public void onMessageFound(Message message) {
+								mNotificationService.pushFromBacklog(message);
+							}
+						});
 					}
+					mNotificationService.finishBacklog(false);
 					mRestoredFromDatabase = true;
 					Logging.d(Config.LOGTAG,"restored all messages");
 					updateConversationUi();
@@ -932,6 +1141,12 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		}
 	}
 
+	public void loadPhoneContacts() {
+		PhoneHelper.loadPhoneContacts(getApplicationContext(),
+				new CopyOnWriteArrayList<Bundle>(),
+				XmppConnectionService.this);
+	}
+
 	public List<Conversation> getConversations() {
 		return this.conversations;
 	}
@@ -943,6 +1158,10 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 			public void onMessageFound(Message message) {
 				if (!FileBackend.isFileAvailable(message)) {
 					message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_DELETED));
+					final int s = message.getStatus();
+					if (s == Message.STATUS_WAITING || s == Message.STATUS_OFFERED || s == Message.STATUS_UNSEND) {
+						markMessage(message, Message.STATUS_SEND_FAILED);
+					}
 				}
 			}
 		});
@@ -954,7 +1173,12 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 			if (message != null) {
 				if (!FileBackend.isFileAvailable(message)) {
 					message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_DELETED));
-					updateConversationUi();
+					final int s = message.getStatus();
+					if (s == Message.STATUS_WAITING || s == Message.STATUS_OFFERED || s == Message.STATUS_UNSEND) {
+						markMessage(message, Message.STATUS_SEND_FAILED);
+					} else {
+						updateConversationUi();
+					}
 				}
 				return;
 			}
@@ -994,12 +1218,15 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 	}
 
 	public void loadMoreMessages(final Conversation conversation, final long timestamp, final OnMoreMessagesLoaded callback) {
-		Logging.d(Config.LOGTAG, "load more messages for " + conversation.getName() + " prior to " + MessageGenerator.getTimestamp(timestamp));
-		if (XmppConnectionService.this.getMessageArchiveService().queryInProgress(conversation,callback)) {
+		if (XmppConnectionService.this.getMessageArchiveService().queryInProgress(conversation, callback)) {
             Logging.d("mam", "Query in progress");
 			return;
+		} else if (timestamp == 0) {
+            Logging.d("mam", "Query stopped due to timestamp");
+			return;
 		}
         //TODO Create a separate class for this runnable to store if messages are getting loaded or not. Not really a good idea to do this in the callback.
+		Logging.d(Config.LOGTAG, "load more messages for " + conversation.getName() + " prior to " + MessageGenerator.getTimestamp(timestamp));
 		Runnable runnable = new Runnable() {
 			@Override
 			public void run() {
@@ -1007,30 +1234,32 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
                     if (null != callback) {
                         callback.setLoadingInProgress(); // Tell the callback that the loading is in progress
                     }
-                    final Account account = conversation.getAccount();
-                    List<Message> messages = databaseBackend.getMessages(conversation, 50, timestamp);
+				final Account account = conversation.getAccount();
+				List<Message> messages = databaseBackend.getMessages(conversation, 50, timestamp);
                     Logging.d("mam", "runnable load more messages");
-                    if (messages.size() > 0) {
+				if (messages.size() > 0) {
                         Logging.d("mam", "At least one message");
-                        conversation.addAll(0, messages);
-                        checkDeletedFiles(conversation);
-                        callback.onMoreMessagesLoaded(messages.size(), conversation);
-                    } else if (conversation.hasMessagesLeftOnServer()
-                            && account.isOnlineAndConnected()
-                            && account.getXmppConnection().getFeatures().mam()) {
+					conversation.addAll(0, messages);
+					checkDeletedFiles(conversation);
+					callback.onMoreMessagesLoaded(messages.size(), conversation);
+				} else if (conversation.hasMessagesLeftOnServer()
+						&& account.isOnlineAndConnected()) {
                         Logging.d("mam", "mam activate, account online and connected and messages left on server");
-                        MessageArchiveService.Query query = getMessageArchiveService().query(conversation, 0, timestamp - 1);
-                        if (query != null) {
-                            query.setCallback(callback);
-                        }
-                        callback.informUser(R.string.fetching_history_from_server);
-                    } else {
+					if ((conversation.getMode() == Conversation.MODE_SINGLE && account.getXmppConnection().getFeatures().mam())
+							|| (conversation.getMode() == Conversation.MODE_MULTI && conversation.getMucOptions().mamSupport())) {
+						MessageArchiveService.Query query = getMessageArchiveService().query(conversation, 0, timestamp - 1);
+						if (query != null) {
+							query.setCallback(callback);
+						}
+						callback.informUser(R.string.fetching_history_from_server);
+					}
+				} else {
                         Logging.d("mam", ((!conversation.hasMessagesLeftOnServer()) ? "no" : "") + " more messages left on server, mam " + ((account.getXmppConnection().getFeatures().mam()) ? "" : "not") + " activated, account is " + ((account.isOnlineAndConnected()) ? "" : "not") + " online or connected)");
                         callback.onMoreMessagesLoaded(0, conversation);
                         callback.informUser(R.string.no_more_history_on_server);
                     }
+			}
                 }
-            }
 		};
         ConversationsPlusApplication.executeDatabaseOperation(runnable);
 	}
@@ -1128,7 +1357,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 			if (conversation.getMode() == Conversation.MODE_MULTI) {
 				if (conversation.getAccount().getStatus() == Account.State.ONLINE) {
 					Bookmark bookmark = conversation.getBookmark();
-					if (bookmark != null && bookmark.autojoin()) {
+					if (bookmark != null && bookmark.autojoin() && respectAutojoin()) {
 						bookmark.setAutojoin(false);
 						pushBookmarks(bookmark.getAccount());
 					}
@@ -1136,6 +1365,13 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 				leaveMuc(conversation);
 			} else {
 				conversation.endOtrIfNeeded();
+				if (conversation.getContact().getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)) {
+					Log.d(Config.LOGTAG, "Canceling presence request from " + conversation.getJid().toString());
+					sendPresencePacket(
+							conversation.getAccount(),
+							mPresenceGenerator.stopPresenceUpdatesTo(conversation.getContact())
+					);
+				}
 			}
 			this.databaseBackend.updateConversation(conversation);
 			this.conversations.remove(conversation);
@@ -1151,10 +1387,68 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		updateAccountUi();
 	}
 
+	public void createAccountFromKey(final String alias, final OnAccountCreated callback) {
+		new Thread(new Runnable() {
+			@Override
+			public void run() {
+				try {
+					X509Certificate[] chain = KeyChain.getCertificateChain(XmppConnectionService.this, alias);
+					Pair<Jid, String> info = CryptoHelper.extractJidAndName(chain[0]);
+					if (findAccountByJid(info.first) == null) {
+						Account account = new Account(info.first, "");
+						account.setPrivateKeyAlias(alias);
+						account.setOption(Account.OPTION_DISABLED, true);
+						account.setDisplayName(info.second);
+						createAccount(account);
+						callback.onAccountCreated(account);
+						if (Config.X509_VERIFICATION) {
+							try {
+								getMemorizingTrustManager().getNonInteractive().checkClientTrusted(chain, "RSA");
+							} catch (CertificateException e) {
+								callback.informUser(R.string.certificate_chain_is_not_trusted);
+							}
+						}
+					} else {
+						callback.informUser(R.string.account_already_exists);
+					}
+				} catch (Exception e) {
+					e.printStackTrace();
+					callback.informUser(R.string.unable_to_parse_certificate);
+				}
+			}
+		}).start();
+
+	}
+
+	public void updateKeyInAccount(final Account account, final String alias) {
+		Log.d(Config.LOGTAG, "update key in account " + alias);
+		try {
+			X509Certificate[] chain = KeyChain.getCertificateChain(XmppConnectionService.this, alias);
+			Pair<Jid, String> info = CryptoHelper.extractJidAndName(chain[0]);
+			if (account.getJid().toBareJid().equals(info.first)) {
+				account.setPrivateKeyAlias(alias);
+				account.setDisplayName(info.second);
+				databaseBackend.updateAccount(account);
+				if (Config.X509_VERIFICATION) {
+					try {
+						getMemorizingTrustManager().getNonInteractive().checkClientTrusted(chain, "RSA");
+					} catch (CertificateException e) {
+						showErrorToastInUi(R.string.certificate_chain_is_not_trusted);
+					}
+					account.getAxolotlService().regenerateKeys(true);
+				}
+			} else {
+				showErrorToastInUi(R.string.jid_does_not_match_certificate);
+			}
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+	}
+
 	public void updateAccount(final Account account) {
 		this.statusListener.onStatusChanged(account);
 		databaseBackend.updateAccount(account);
-		reconnectAccount(account, false);
+		reconnectAccountInBackground(account);
 		updateAccountUi();
 		getNotificationService().updateErrorNotification();
 	}
@@ -1190,7 +1484,13 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 			if (account.getXmppConnection() != null) {
 				this.disconnect(account, true);
 			}
-			databaseBackend.deleteAccount(account);
+			Runnable runnable = new Runnable() {
+				@Override
+				public void run() {
+					databaseBackend.deleteAccount(account);
+				}
+			};
+			ConversationsPlusApplication.executeDatabaseOperation(runnable);
 			this.accounts.remove(account);
 			updateAccountUi();
 			getNotificationService().updateErrorNotification();
@@ -1275,6 +1575,31 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		}
 	}
 
+	public void setOnCaptchaRequestedListener(OnCaptchaRequested listener) {
+		synchronized (this) {
+			if (checkListeners()) {
+				switchToForeground();
+			}
+			this.mOnCaptchaRequested = listener;
+			if (this.captchaRequestedListenerCount < 2) {
+				this.captchaRequestedListenerCount++;
+			}
+		}
+	}
+
+	public void removeOnCaptchaRequestedListener() {
+		synchronized (this) {
+			this.captchaRequestedListenerCount--;
+			if (this.captchaRequestedListenerCount <= 0) {
+				this.mOnCaptchaRequested = null;
+				this.captchaRequestedListenerCount = 0;
+				if (checkListeners()) {
+					switchToBackground();
+				}
+			}
+		}
+	}
+
 	public void setOnRosterUpdateListener(final OnRosterUpdate listener) {
 		synchronized (this) {
 			if (checkListeners()) {
@@ -1325,6 +1650,31 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		}
 	}
 
+	public void setOnKeyStatusUpdatedListener(final OnKeyStatusUpdated listener) {
+		synchronized (this) {
+			if (checkListeners()) {
+				switchToForeground();
+			}
+			this.mOnKeyStatusUpdated = listener;
+			if (this.keyStatusUpdatedListenerCount < 2) {
+				this.keyStatusUpdatedListenerCount++;
+			}
+		}
+	}
+
+	public void removeOnNewKeysAvailableListener() {
+		synchronized (this) {
+			this.keyStatusUpdatedListenerCount--;
+			if (this.keyStatusUpdatedListenerCount <= 0) {
+				this.keyStatusUpdatedListenerCount = 0;
+				this.mOnKeyStatusUpdated = null;
+				if (checkListeners()) {
+					switchToBackground();
+				}
+			}
+		}
+	}
+
 	public void setOnMucRosterUpdateListener(OnMucRosterUpdate listener) {
 		synchronized (this) {
 			if (checkListeners()) {
@@ -1354,11 +1704,16 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		return (this.mOnAccountUpdate == null
 				&& this.mOnConversationUpdate == null
 				&& this.mOnRosterUpdate == null
+				&& this.mOnCaptchaRequested == null
 				&& this.mOnUpdateBlocklist == null
-				&& this.mOnShowErrorToast == null);
+				&& this.mOnShowErrorToast == null
+				&& this.mOnKeyStatusUpdated == null);
 	}
 
 	private void switchToForeground() {
+		for (Conversation conversation : getConversations()) {
+			conversation.setIncomingChatState(ChatState.ACTIVE);
+		}
 		for (Account account : getAccounts()) {
 			if (account.getStatus() == Account.State.ONLINE) {
 				XmppConnection connection = account.getXmppConnection();
@@ -1374,14 +1729,17 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		for (Account account : getAccounts()) {
 			if (account.getStatus() == Account.State.ONLINE) {
 				XmppConnection connection = account.getXmppConnection();
-				if (connection != null && connection.getFeatures().csi()) {
-					connection.sendInactive();
+				if (connection != null) {
+					if (connection.getFeatures().csi()) {
+						connection.sendInactive();
+					}
+					if (Config.CLOSE_TCP_WHEN_SWITCHING_TO_BACKGROUND && mPushManagementService.available(account)) {
+						connection.waitForPush();
+						cancelWakeUpCall(account.getUuid().hashCode());
+					}
 				}
 			}
 		}
-		for(Conversation conversation : getConversations()) {
-			conversation.setIncomingChatState(ChatState.ACTIVE);
-		}
 		this.mNotificationService.setIsInForeground(false);
 		Logging.d(Config.LOGTAG, "app switched into background");
 	}
@@ -1389,47 +1747,80 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 	private void connectMultiModeConversations(Account account) {
 		List<Conversation> conversations = getConversations();
 		for (Conversation conversation : conversations) {
-			if ((conversation.getMode() == Conversation.MODE_MULTI)
-					&& (conversation.getAccount() == account)) {
-				conversation.resetMucOptions();
+			if (conversation.getMode() == Conversation.MODE_MULTI && conversation.getAccount() == account) {
 				joinMuc(conversation);
 			}
 		}
 	}
 
 	public void joinMuc(Conversation conversation) {
+		joinMuc(conversation, null);
+	}
+
+	private void joinMuc(Conversation conversation, final OnConferenceJoined onConferenceJoined) {
 		Account account = conversation.getAccount();
 		account.pendingConferenceJoins.remove(conversation);
 		account.pendingConferenceLeaves.remove(conversation);
 		if (account.getStatus() == Account.State.ONLINE) {
-			final String nick = conversation.getMucOptions().getProposedNick();
-			final Jid joinJid = conversation.getMucOptions().createJoinJid(nick);
-			if (joinJid == null) {
-				return; //safety net
-			}
-			Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": joining conversation " + joinJid.toString());
-			PresencePacket packet = new PresencePacket();
-			packet.setFrom(conversation.getAccount().getJid());
-			packet.setTo(joinJid);
-			Element x = packet.addChild("x", "http://jabber.org/protocol/muc");
-			if (conversation.getMucOptions().getPassword() != null) {
-				x.addChild("password").setContent(conversation.getMucOptions().getPassword());
-			}
-			x.addChild("history").setAttribute("since", PresenceGenerator.getTimestamp(conversation.getLastMessageTransmitted()));
-			String sig = account.getPgpSignature();
-			if (sig != null) {
-				packet.addChild("status").setContent("online");
-				packet.addChild("x", "jabber:x:signed").setContent(sig);
-			}
-			sendPresencePacket(account, packet);
-			fetchConferenceConfiguration(conversation);
-			if (!joinJid.equals(conversation.getJid())) {
-				conversation.setContactJid(joinJid);
-				databaseBackend.updateConversation(conversation);
-			}
+			conversation.resetMucOptions();
 			conversation.setHasMessagesLeftOnServer(false);
+			fetchConferenceConfiguration(conversation, new OnConferenceConfigurationFetched() {
+
+				private void join(Conversation conversation) {
+					Account account = conversation.getAccount();
+					final String nick = conversation.getMucOptions().getProposedNick();
+					final Jid joinJid = conversation.getMucOptions().createJoinJid(nick);
+					Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": joining conversation " + joinJid.toString());
+					PresencePacket packet = new PresencePacket();
+					packet.setFrom(conversation.getAccount().getJid());
+					packet.setTo(joinJid);
+					Element x = packet.addChild("x", "http://jabber.org/protocol/muc");
+					if (conversation.getMucOptions().getPassword() != null) {
+						x.addChild("password").setContent(conversation.getMucOptions().getPassword());
+					}
+
+					if (conversation.getMucOptions().mamSupport()) {
+						// Use MAM instead of the limited muc history to get history
+						x.addChild("history").setAttribute("maxchars", "0");
+					} else {
+						// Fallback to muc history
+						x.addChild("history").setAttribute("since", PresenceGenerator.getTimestamp(conversation.getLastMessageTransmitted()));
+					}
+					String sig = account.getPgpSignature();
+					if (sig != null) {
+						packet.addChild("x", "jabber:x:signed").setContent(sig);
+					}
+					sendPresencePacket(account, packet);
+					if (onConferenceJoined != null) {
+						onConferenceJoined.onConferenceJoined(conversation);
+					}
+					if (!joinJid.equals(conversation.getJid())) {
+						conversation.setContactJid(joinJid);
+						databaseBackend.updateConversation(conversation);
+					}
+					if (conversation.getMucOptions().mamSupport()) {
+						getMessageArchiveService().catchupMUC(conversation);
+					}
+					sendUnsentMessages(conversation);
+				}
+
+				@Override
+				public void onConferenceConfigurationFetched(Conversation conversation) {
+					join(conversation);
+				}
+
+				@Override
+				public void onFetchFailed(final Conversation conversation, Element error) {
+					join(conversation);
+					fetchConferenceConfiguration(conversation);
+				}
+			});
+			updateConversationUi();
 		} else {
 			account.pendingConferenceJoins.add(conversation);
+			conversation.resetMucOptions();
+			conversation.setHasMessagesLeftOnServer(false);
+			updateConversationUi();
 		}
 	}
 
@@ -1437,7 +1828,9 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		if (conversation.getMode() == Conversation.MODE_MULTI) {
 			conversation.getMucOptions().setPassword(password);
 			if (conversation.getBookmark() != null) {
-				conversation.getBookmark().setAutojoin(true);
+				if (respectAutojoin()) {
+					conversation.getBookmark().setAutojoin(true);
+				}
 				pushBookmarks(conversation.getAccount());
 			}
 			databaseBackend.updateConversation(conversation);
@@ -1495,10 +1888,14 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 	}
 
 	public void leaveMuc(Conversation conversation) {
+		leaveMuc(conversation, false);
+	}
+
+	private void leaveMuc(Conversation conversation, boolean now) {
 		Account account = conversation.getAccount();
 		account.pendingConferenceJoins.remove(conversation);
 		account.pendingConferenceLeaves.remove(conversation);
-		if (account.getStatus() == Account.State.ONLINE) {
+		if (account.getStatus() == Account.State.ONLINE || now) {
 			PresencePacket packet = new PresencePacket();
 			packet.setTo(conversation.getJid());
 			packet.setFrom(conversation.getAccount().getJid());
@@ -1546,34 +1943,37 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 				String name = new BigInteger(75, getRNG()).toString(32);
 				Jid jid = Jid.fromParts(name, server, null);
 				final Conversation conversation = findOrCreateConversation(account, jid, true);
-				joinMuc(conversation);
-				Bundle options = new Bundle();
-				options.putString("muc#roomconfig_persistentroom", "1");
-				options.putString("muc#roomconfig_membersonly", "1");
-				options.putString("muc#roomconfig_publicroom", "0");
-				options.putString("muc#roomconfig_whois", "anyone");
-				pushConferenceConfiguration(conversation, options, new OnConferenceOptionsPushed() {
+				joinMuc(conversation, new OnConferenceJoined() {
 					@Override
-					public void onPushSucceeded() {
-						for (Jid invite : jids) {
-							invite(conversation, invite);
-						}
-						if (account.countPresences() > 1) {
-							directInvite(conversation, account.getJid().toBareJid());
-						}
-						if (callback != null) {
-							callback.success(conversation);
-						}
-					}
+					public void onConferenceJoined(final Conversation conversation) {
+						Bundle options = new Bundle();
+						options.putString("muc#roomconfig_persistentroom", "1");
+						options.putString("muc#roomconfig_membersonly", "1");
+						options.putString("muc#roomconfig_publicroom", "0");
+						options.putString("muc#roomconfig_whois", "anyone");
+						pushConferenceConfiguration(conversation, options, new OnConferenceOptionsPushed() {
+							@Override
+							public void onPushSucceeded() {
+								for (Jid invite : jids) {
+									invite(conversation, invite);
+								}
+								if (account.countPresences() > 1) {
+									directInvite(conversation, account.getJid().toBareJid());
+								}
+								if (callback != null) {
+									callback.success(conversation);
+								}
+							}
 
-					@Override
-					public void onPushFailed() {
-						if (callback != null) {
-							callback.error(R.string.conference_creation_failed, conversation);
-						}
+							@Override
+							public void onPushFailed() {
+								if (callback != null) {
+									callback.error(R.string.conference_creation_failed, conversation);
+								}
+							}
+						});
 					}
 				});
-
 			} catch (InvalidJidException e) {
 				if (callback != null) {
 					callback.error(R.string.conference_creation_failed, null);
@@ -1587,15 +1987,20 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 	}
 
 	public void fetchConferenceConfiguration(final Conversation conversation) {
+		fetchConferenceConfiguration(conversation, null);
+	}
+
+	public void fetchConferenceConfiguration(final Conversation conversation, final OnConferenceConfigurationFetched callback) {
 		IqPacket request = new IqPacket(IqPacket.TYPE.GET);
 		request.setTo(conversation.getJid().toBareJid());
 		request.query("http://jabber.org/protocol/disco#info");
 		sendIqPacket(conversation.getAccount(), request, new OnIqPacketReceived() {
 			@Override
 			public void onIqPacketReceived(Account account, IqPacket packet) {
-				if (packet.getType() != IqPacket.TYPE.ERROR) {
+				if (packet.getType() == IqPacket.TYPE.RESULT) {
 					ArrayList<String> features = new ArrayList<>();
-					for (Element child : packet.query().getChildren()) {
+					Element query = packet.query();
+					for (Element child : query.getChildren()) {
 						if (child != null && child.getName().equals("feature")) {
 							String var = child.getAttribute("var");
 							if (var != null) {
@@ -1603,8 +2008,19 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 							}
 						}
 					}
+					Element form = query.findChild("x", "jabber:x:data");
+					if (form != null) {
+						conversation.getMucOptions().updateFormData(Data.parse(form));
+					}
 					conversation.getMucOptions().updateFeatures(features);
+					if (callback != null) {
+						callback.onConferenceConfigurationFetched(conversation);
+					}
 					updateConversationUi();
+				} else if (packet.getType() == IqPacket.TYPE.ERROR) {
+					if (callback != null) {
+						callback.onFetchFailed(conversation, packet.getError());
+					}
 				}
 			}
 		});
@@ -1617,11 +2033,11 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		sendIqPacket(conversation.getAccount(), request, new OnIqPacketReceived() {
 			@Override
 			public void onIqPacketReceived(Account account, IqPacket packet) {
-				if (packet.getType() != IqPacket.TYPE.ERROR) {
+				if (packet.getType() == IqPacket.TYPE.RESULT) {
 					Data data = Data.parse(packet.query().findChild("x", "jabber:x:data"));
 					for (Field field : data.getFields()) {
-						if (options.containsKey(field.getName())) {
-							field.setValue(options.getString(field.getName()));
+						if (options.containsKey(field.getFieldName())) {
+							field.setValue(options.getString(field.getFieldName()));
 						}
 					}
 					data.submit();
@@ -1631,12 +2047,10 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 					sendIqPacket(account, set, new OnIqPacketReceived() {
 						@Override
 						public void onIqPacketReceived(Account account, IqPacket packet) {
-							if (packet.getType() == IqPacket.TYPE.RESULT) {
-								if (callback != null) {
+							if (callback != null) {
+								if (packet.getType() == IqPacket.TYPE.RESULT) {
 									callback.onPushSucceeded();
-								}
-							} else {
-								if (callback != null) {
+								} else {
 									callback.onPushFailed();
 								}
 							}
@@ -1705,7 +2119,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		});
 	}
 
-	public void disconnect(Account account, boolean force) {
+	private void disconnect(Account account, boolean force) {
 		if ((account.getStatus() == Account.State.ONLINE)
 				|| (account.getStatus() == Account.State.DISABLED)) {
 			if (!force) {
@@ -1713,7 +2127,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 				for (Conversation conversation : conversations) {
 					if (conversation.getAccount() == account) {
 						if (conversation.getMode() == Conversation.MODE_MULTI) {
-							leaveMuc(conversation);
+							leaveMuc(conversation, true);
 						} else {
 							if (conversation.endOtrIfNeeded()) {
 								Logging.d(Config.LOGTAG, account.getJid().toBareJid()
@@ -1739,6 +2153,11 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		updateConversationUi();
 	}
 
+	public void updateMessage(Message message, String uuid) {
+		databaseBackend.updateMessage(message, uuid);
+		updateConversationUi();
+	}
+
 	protected void syncDirtyContacts(Account account) {
 		for (Contact contact : account.getRoster().getContacts()) {
 			if (contact.getOption(Contact.Options.DIRTY_PUSH)) {
@@ -1765,7 +2184,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 				account.getJid().toBareJid() + " otr session established with "
 						+ conversation.getJid() + "/"
 						+ otrSession.getSessionID().getUserID());
-		conversation.findUnsentMessagesWithOtrEncryption(new Conversation.OnMessageFound() {
+		conversation.findUnsentMessagesWithEncryption(Message.ENCRYPTION_OTR, new Conversation.OnMessageFound() {
 
 			@Override
 			public void onMessageFound(Message message) {
@@ -1778,8 +2197,9 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 				if (message.needsUploading()) {
 					mJingleConnectionManager.createNewConnection(message);
 				} else {
-					MessagePacket outPacket = mMessageGenerator.generateOtrChat(message, true);
+					MessagePacket outPacket = mMessageGenerator.generateOtrChat(message);
 					if (outPacket != null) {
+						mMessageGenerator.addDelay(outPacket, message.getTimeSent());
 						message.setStatus(Message.STATUS_SEND);
 						databaseBackend.updateMessage(message);
 						sendMessagePacket(account, outPacket);
@@ -1799,8 +2219,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 			MessagePacket packet = new MessagePacket();
 			packet.setType(MessagePacket.TYPE_CHAT);
 			packet.setFrom(account.getJid());
-			packet.addChild("private", "urn:xmpp:carbons:2");
-			packet.addChild("no-copy", "urn:xmpp:hints");
+			MessageGenerator.addMessageHints(packet);
 			packet.setAttribute("to", otrSession.getSessionID().getAccountID() + "/"
 					+ otrSession.getSessionID().getUserID());
 			try {
@@ -1858,24 +2277,39 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		this.databaseBackend.updateConversation(conversation);
 	}
 
-	public void reconnectAccount(final Account account, final boolean force) {
+	private void reconnectAccount(final Account account, final boolean force, final boolean interactive) {
 		synchronized (account) {
-			if (account.getXmppConnection() != null) {
+			XmppConnection connection = account.getXmppConnection();
+			if (connection != null) {
 				disconnect(account, force);
+			} else {
+				connection = createConnection(account);
+				account.setXmppConnection(connection);
 			}
 			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
-
-                AvatarService.getInstance().clearFetchInProgress(account);
-
-				if (account.getXmppConnection() == null) {
-					account.setXmppConnection(createConnection(account));
+				synchronized (this.mInProgressAvatarFetches) {
+					for (Iterator<String> iterator = this.mInProgressAvatarFetches.iterator(); iterator.hasNext(); ) {
+						final String KEY = iterator.next();
+						if (KEY.startsWith(account.getJid().toBareJid() + "_")) {
+							iterator.remove();
+						}
+					}
+				}
+				if (!force) {
+					try {
+						Logging.d(Config.LOGTAG, "wait for disconnect");
+						Thread.sleep(500); //sleep  wait for disconnect
+					} catch (InterruptedException e) {
+						//ignored
+					}
 				}
-				Thread thread = new Thread(account.getXmppConnection());
+				Thread thread = new Thread(connection);
+				connection.setInteractive(interactive);
 				thread.start();
-				scheduleWakeUpCall(Config.CONNECT_TIMEOUT, account.getUuid().hashCode());
+				scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
 			} else {
 				account.getRoster().clearPresences();
-				account.setXmppConnection(null);
+				connection.resetEverything();
 			}
 		}
 	}
@@ -1884,7 +2318,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		new Thread(new Runnable() {
 			@Override
 			public void run() {
-				reconnectAccount(account,false);
+				reconnectAccount(account, false, true);
 			}
 		}).start();
 	}
@@ -1920,7 +2354,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		}
 		for (Conversation conversation : getConversations()) {
 			if (conversation.getJid().toBareJid().equals(recipient) && conversation.getAccount() == account) {
-				final Message message = conversation.findSentMessageWithUuid(uuid);
+				final Message message = conversation.findSentMessageWithUuidOrRemoteId(uuid);
 				if (message != null) {
 					markMessage(message, status);
 				}
@@ -1930,8 +2364,7 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		return null;
 	}
 
-	public boolean markMessage(Conversation conversation, String uuid,
-							   int status) {
+	public boolean markMessage(Conversation conversation, String uuid, int status) {
 		if (uuid == null) {
 			return false;
 		} else {
@@ -1956,9 +2389,26 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		updateConversationUi();
 	}
 
+	public SharedPreferences getPreferences() {
+		return PreferenceManager
+				.getDefaultSharedPreferences(getApplicationContext());
+	}
+
+	public boolean saveEncryptedMessages() {
+		return !getPreferences().getBoolean("dont_save_encrypted", false);
+	}
+
+	private boolean respectAutojoin() {
+		return getPreferences().getBoolean("autojoin", true);
+	}
+
+	public boolean showExtendedConnectionOptions() {
+		return getPreferences().getBoolean("show_connection_options", false);
+	}
+
 	public int unreadCount() {
 		int count = 0;
-		for(Conversation conversation : getConversations()) {
+		for (Conversation conversation : getConversations()) {
 			count += conversation.unreadCount();
 		}
 		return count;
@@ -1989,6 +2439,20 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		}
 	}
 
+	public boolean displayCaptchaRequest(Account account, String id, Data data, Bitmap captcha) {
+		boolean rc = false;
+		if (mOnCaptchaRequested != null) {
+			DisplayMetrics metrics = getApplicationContext().getResources().getDisplayMetrics();
+			Bitmap scaled = Bitmap.createScaledBitmap(captcha, (int) (captcha.getWidth() * metrics.scaledDensity),
+					(int) (captcha.getHeight() * metrics.scaledDensity), false);
+
+			mOnCaptchaRequested.onCaptchaRequested(account, id, data, scaled);
+			rc = true;
+		}
+
+		return rc;
+	}
+
 	public void updateBlocklistUi(final OnUpdateBlocklist.Status status) {
 		if (mOnUpdateBlocklist != null) {
 			mOnUpdateBlocklist.OnUpdateBlocklist(status);
@@ -2001,6 +2465,12 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		}
 	}
 
+	public void keyStatusUpdated(AxolotlService.FetchStatus report) {
+		if (mOnKeyStatusUpdated != null) {
+			mOnKeyStatusUpdated.onKeyStatusUpdated(report);
+		}
+	}
+
 	public Account findAccountByJid(final Jid accountJid) {
 		for (Account account : this.accounts) {
 			if (account.getJid().toBareJid().equals(accountJid.toBareJid())) {
@@ -2019,10 +2489,24 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		return null;
 	}
 
-	public void markRead(final Conversation conversation) {
+	public boolean markRead(final Conversation conversation) {
 		mNotificationService.clear(conversation);
-		conversation.markRead();
-		updateUnreadCountBadge();
+		final List<Message> readMessages = conversation.markRead();
+		if (readMessages.size() > 0) {
+			Runnable runnable = new Runnable() {
+				@Override
+				public void run() {
+					for (Message message : readMessages) {
+						databaseBackend.updateMessage(message);
+					}
+				}
+			};
+			ConversationsPlusApplication.executeDatabaseOperation(runnable);
+			updateUnreadCountBadge();
+			return true;
+		} else {
+			return false;
+		}
 	}
 
 	public synchronized void updateUnreadCountBadge() {
@@ -2040,7 +2524,9 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 
 	public void sendReadMarker(final Conversation conversation) {
 		final Message markable = conversation.getLatestMarkableMessage();
-		this.markRead(conversation);
+		if (this.markRead(conversation)) {
+			updateConversationUi();
+		}
 		if (Settings.CONFIRM_MESSAGE_READ && markable != null && markable.getRemoteMsgId() != null) {
 			Logging.d(Config.LOGTAG, conversation.getAccount().getJid().toBareJid() + ": sending read marker to " + markable.getCounterpart().toString());
 			Account account = conversation.getAccount();
@@ -2048,7 +2534,6 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 			MessagePacket packet = mMessageGenerator.confirm(account, to, markable.getRemoteMsgId());
 			this.sendMessagePacket(conversation.getAccount(), packet);
 		}
-		updateConversationUi();
 	}
 
 	public SecureRandom getRNG() {
@@ -2077,6 +2562,10 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		return this.pm;
 	}
 
+	public LruCache<String, Bitmap> getBitmapCache() {
+		return this.mBitmapCache;
+	}
+
 	public void syncRosterToDisk(final Account account) {
 		Runnable runnable = new Runnable() {
 
@@ -2119,27 +2608,50 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		return mucServers;
 	}
 
+    @Deprecated
 	public void sendMessagePacket(Account account, MessagePacket packet) {
-		XmppConnection connection = account.getXmppConnection();
-		if (connection != null) {
-			connection.sendMessagePacket(packet);
-		}
+		XmppSendUtil.sendMessagePacket(account, packet);
 	}
 
+    @Deprecated
 	public void sendPresencePacket(Account account, PresencePacket packet) {
 		XmppSendUtil.sendPresencePacket(account, packet);
 	}
 
+	public void sendCreateAccountWithCaptchaPacket(Account account, String id, Data data) {
+		XmppConnection connection = account.getXmppConnection();
+		if (connection != null) {
+			connection.sendCaptchaRegistryRequest(id, data);
+		}
+	}
+
+    @Deprecated
 	public void sendIqPacket(final Account account, final IqPacket packet, final OnIqPacketReceived callback) {
 		XmppSendUtil.sendIqPacket(account, packet, callback);
 	}
 
 	public void sendPresence(final Account account) {
-		sendPresencePacket(account, mPresenceGenerator.sendPresence(account));
+		XmppSendUtil.sendPresencePacket(account, mPresenceGenerator.selfPresence(account, getTargetPresence()));
+	}
+
+	public void refreshAllPresences() {
+		for (Account account : getAccounts()) {
+			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
+				sendPresence(account);
+			}
+		}
+	}
+
+	private void refreshAllGcmTokens() {
+		for(Account account : getAccounts()) {
+			if (account.isOnlineAndConnected() && mPushManagementService.available(account)) {
+				mPushManagementService.registerPushTokenOnServer(account);
+			}
+		}
 	}
 
 	public void sendOfflinePresence(final Account account) {
-		sendPresencePacket(account, mPresenceGenerator.sendOfflinePresence(account));
+        XmppSendUtil.sendPresencePacket(account, mPresenceGenerator.sendOfflinePresence(account));
 	}
 
 	public MessageGenerator getMessageGenerator() {
@@ -2199,8 +2711,9 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 			}
 		}
 		for (final Message msg : messages) {
+			msg.setTime(System.currentTimeMillis());
 			markMessage(msg, Message.STATUS_WAITING);
-			this.resendMessage(msg);
+			this.resendMessage(msg, false);
 		}
 	}
 
@@ -2212,12 +2725,13 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
          * Therefore set this flag to true and try to get messages from server
          */
 		conversation.setHasMessagesLeftOnServer(true);
-		new Thread(new Runnable() {
+		Runnable runnable = new Runnable() {
 			@Override
 			public void run() {
 				databaseBackend.deleteMessagesInConversation(conversation);
 			}
-		}).start();
+		};
+		ConversationsPlusApplication.executeDatabaseOperation(runnable);
 	}
 
 	public void sendBlockRequest(final Blockable blockable) {
@@ -2251,10 +2765,116 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		}
 	}
 
+	public void publishDisplayName(Account account) {
+		String displayName = account.getDisplayName();
+		if (displayName != null && !displayName.isEmpty()) {
+			IqPacket publish = mIqGenerator.publishNick(displayName);
+			sendIqPacket(account, publish, new OnIqPacketReceived() {
+				@Override
+				public void onIqPacketReceived(Account account, IqPacket packet) {
+					if (packet.getType() == IqPacket.TYPE.ERROR) {
+						Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": could not publish nick");
+					}
+				}
+			});
+		}
+	}
+
+	private ServiceDiscoveryResult getCachedServiceDiscoveryResult(Pair<String,String> key) {
+		ServiceDiscoveryResult result = discoCache.get(key);
+		if (result != null) {
+			return result;
+		} else {
+			result = databaseBackend.findDiscoveryResult(key.first, key.second);
+			if (result != null) {
+				discoCache.put(key, result);
+			}
+			return result;
+		}
+	}
+
+	public void fetchCaps(Account account, final Jid jid, final Presence presence) {
+		final Pair<String,String> key = new Pair<>(presence.getHash(), presence.getVer());
+		ServiceDiscoveryResult disco = getCachedServiceDiscoveryResult(key);
+		if (disco != null) {
+			presence.setServiceDiscoveryResult(disco);
+		} else {
+			if (!account.inProgressDiscoFetches.contains(key)) {
+				account.inProgressDiscoFetches.add(key);
+				IqPacket request = new IqPacket(IqPacket.TYPE.GET);
+				request.setTo(jid);
+				request.query("http://jabber.org/protocol/disco#info");
+				Log.d(Config.LOGTAG,account.getJid().toBareJid()+": making disco request for "+key.second+" to "+jid);
+				sendIqPacket(account, request, new OnIqPacketReceived() {
+					@Override
+					public void onIqPacketReceived(Account account, IqPacket discoPacket) {
+						if (discoPacket.getType() == IqPacket.TYPE.RESULT) {
+							ServiceDiscoveryResult disco = new ServiceDiscoveryResult(discoPacket);
+							if (presence.getVer().equals(disco.getVer())) {
+								databaseBackend.insertDiscoveryResult(disco);
+								injectServiceDiscorveryResult(account.getRoster(), presence.getHash(), presence.getVer(), disco);
+							} else {
+								Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": mismatch in caps for contact " + jid + " " + presence.getVer() + " vs " + disco.getVer());
+							}
+						}
+						account.inProgressDiscoFetches.remove(key);
+					}
+				});
+			}
+		}
+	}
+
+	private void injectServiceDiscorveryResult(Roster roster, String hash, String ver, ServiceDiscoveryResult disco) {
+		for(Contact contact : roster.getContacts()) {
+			for(Presence presence : contact.getPresences().getPresences().values()) {
+				if (hash.equals(presence.getHash()) && ver.equals(presence.getVer())) {
+					presence.setServiceDiscoveryResult(disco);
+				}
+			}
+		}
+	}
+
+	public void fetchMamPreferences(Account account, final OnMamPreferencesFetched callback) {
+		IqPacket request = new IqPacket(IqPacket.TYPE.GET);
+		request.addChild("prefs","urn:xmpp:mam:0");
+		sendIqPacket(account, request, new OnIqPacketReceived() {
+			@Override
+			public void onIqPacketReceived(Account account, IqPacket packet) {
+				Element prefs = packet.findChild("prefs","urn:xmpp:mam:0");
+				if (packet.getType() == IqPacket.TYPE.RESULT && prefs != null) {
+					callback.onPreferencesFetched(prefs);
+				} else {
+					callback.onPreferencesFetchFailed();
+				}
+			}
+		});
+	}
+
+	public PushManagementService getPushManagementService() {
+		return mPushManagementService;
+	}
+
+	public interface OnMamPreferencesFetched {
+		void onPreferencesFetched(Element prefs);
+		void onPreferencesFetchFailed();
+	}
+
+	public void pushMamPreferences(Account account, Element prefs) {
+		IqPacket set = new IqPacket(IqPacket.TYPE.SET);
+		set.addChild(prefs);
+		sendIqPacket(account, set, null);
+	}
+
+	public interface OnAccountCreated {
+		void onAccountCreated(Account account);
+
+		void informUser(int r);
+	}
+
 	public interface OnMoreMessagesLoaded {
-		public void onMoreMessagesLoaded(int count, Conversation conversation);
+		void onMoreMessagesLoaded(int count, Conversation conversation);
 
-		public void informUser(int r);
+		void informUser(int r);
 
         void setLoadingInProgress();
 
@@ -2262,43 +2882,60 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 	}
 
 	public interface OnAccountPasswordChanged {
-		public void onPasswordChangeSucceeded();
+		void onPasswordChangeSucceeded();
 
-		public void onPasswordChangeFailed();
+		void onPasswordChangeFailed();
 	}
 
 	public interface OnAffiliationChanged {
-		public void onAffiliationChangedSuccessful(Jid jid);
+		void onAffiliationChangedSuccessful(Jid jid);
 
-		public void onAffiliationChangeFailed(Jid jid, int resId);
+		void onAffiliationChangeFailed(Jid jid, int resId);
 	}
 
 	public interface OnRoleChanged {
-		public void onRoleChangedSuccessful(String nick);
+		void onRoleChangedSuccessful(String nick);
 
-		public void onRoleChangeFailed(String nick, int resid);
+		void onRoleChangeFailed(String nick, int resid);
 	}
 
 	public interface OnConversationUpdate {
-		public void onConversationUpdate();
+		void onConversationUpdate();
 	}
 
 	public interface OnAccountUpdate {
-		public void onAccountUpdate();
+		void onAccountUpdate();
+	}
+
+	public interface OnCaptchaRequested {
+		void onCaptchaRequested(Account account,
+								String id,
+								Data data,
+								Bitmap captcha);
 	}
 
 	public interface OnRosterUpdate {
-		public void onRosterUpdate();
+		void onRosterUpdate();
 	}
 
 	public interface OnMucRosterUpdate {
-		public void onMucRosterUpdate();
+		void onMucRosterUpdate();
+	}
+
+	public interface OnConferenceConfigurationFetched {
+		void onConferenceConfigurationFetched(Conversation conversation);
+
+		void onFetchFailed(Conversation conversation, Element error);
+	}
+
+	public interface OnConferenceJoined {
+		void onConferenceJoined(Conversation conversation);
 	}
 
 	public interface OnConferenceOptionsPushed {
-		public void onPushSucceeded();
+		void onPushSucceeded();
 
-		public void onPushFailed();
+		void onPushFailed();
 	}
 
 	public interface OnShowErrorToast {
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/BlocklistActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/BlocklistActivity.java
index 4e6d7701..377d0e02 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/BlocklistActivity.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/BlocklistActivity.java
@@ -35,7 +35,7 @@ public class BlocklistActivity extends AbstractSearchableListItemActivity implem
 	@Override
 	public void onBackendConnected() {
 		for (final Account account : xmppConnectionService.getAccounts()) {
-			if (account.getJid().toString().equals(getIntent().getStringExtra("account"))) {
+			if (account.getJid().toString().equals(getIntent().getStringExtra(EXTRA_ACCOUNT))) {
 				this.account = account;
 				break;
 			}
@@ -55,16 +55,10 @@ public class BlocklistActivity extends AbstractSearchableListItemActivity implem
 			}
 			Collections.sort(getListItems());
 		}
-		runOnUiThread(new Runnable() {
-			@Override
-			public void run() {
-				getListItemAdapter().notifyDataSetChanged();
-			}
-		});
+		getListItemAdapter().notifyDataSetChanged();
 	}
 
-	@Override
-	public void OnUpdateBlocklist(final OnUpdateBlocklist.Status status) {
+	protected void refreshUiReal() {
 		final Editable editable = getSearchEditText().getText();
 		if (editable != null) {
 			filterContacts(editable.toString());
@@ -72,4 +66,9 @@ public class BlocklistActivity extends AbstractSearchableListItemActivity implem
 			filterContacts();
 		}
 	}
+
+	@Override
+	public void OnUpdateBlocklist(final OnUpdateBlocklist.Status status) {
+		refreshUi();
+	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/ChangePasswordActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/ChangePasswordActivity.java
index 9d6b50fc..1eb9fa05 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/ChangePasswordActivity.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/ChangePasswordActivity.java
@@ -9,8 +9,6 @@ import android.widget.Toast;
 import de.thedevstack.conversationsplus.R;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
-import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
-import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 
 public class ChangePasswordActivity extends XmppActivity implements XmppConnectionService.OnAccountPasswordChanged {
 
@@ -53,14 +51,7 @@ public class ChangePasswordActivity extends XmppActivity implements XmppConnecti
 
 	@Override
 	void onBackendConnected() {
-		try {
-			final String jid = getIntent() == null ? null : getIntent().getStringExtra("account");
-			if (jid != null) {
-				this.mAccount = xmppConnectionService.findAccountByJid(Jid.fromString(jid));
-			}
-		} catch (final InvalidJidException ignored) {
-
-		}
+		this.mAccount = extractAccount(getIntent());
 
 	}
 
@@ -106,4 +97,8 @@ public class ChangePasswordActivity extends XmppActivity implements XmppConnecti
 		});
 
 	}
+
+	public void refreshUiReal() {
+
+	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/ChooseContactActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/ChooseContactActivity.java
index d51d23e1..29860434 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/ChooseContactActivity.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/ChooseContactActivity.java
@@ -13,18 +13,22 @@ import android.widget.AbsListView.MultiChoiceModeListener;
 import android.widget.AdapterView;
 import android.widget.ListView;
 
-import java.util.Set;
-import java.util.HashSet;
+import java.util.ArrayList;
 import java.util.Collections;
+import java.util.HashSet;
 import java.util.List;
-import java.util.ArrayList;
+import java.util.Set;
 
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.R;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Contact;
 import de.thedevstack.conversationsplus.entities.ListItem;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 
 public class ChooseContactActivity extends AbstractSearchableListItemActivity {
+	private List<String> mActivatedAccounts = new ArrayList<String>();
+	private List<String> mKnownHosts;
 
 	private Set<Contact> selected;
 	private Set<String> filterContacts;
@@ -109,11 +113,11 @@ public class ChooseContactActivity extends AbstractSearchableListItemActivity {
 				final Intent data = new Intent();
 				final ListItem mListItem = getListItems().get(position);
 				data.putExtra("contact", mListItem.getJid().toString());
-				String account = request.getStringExtra("account");
+				String account = request.getStringExtra(EXTRA_ACCOUNT);
 				if (account == null && mListItem instanceof Contact) {
 					account = ((Contact) mListItem).getAccount().getJid().toBareJid().toString();
 				}
-				data.putExtra("account", account);
+				data.putExtra(EXTRA_ACCOUNT, account);
 				data.putExtra("conversation",
 						request.getStringExtra("conversation"));
 				data.putExtra("multiple", false);
@@ -124,6 +128,15 @@ public class ChooseContactActivity extends AbstractSearchableListItemActivity {
 
 	}
 
+	@Override
+	public boolean onCreateOptionsMenu(final Menu menu) {
+		super.onCreateOptionsMenu(menu);
+		final Intent i = getIntent();
+		boolean showEnterJid = i != null && i.getBooleanExtra("show_enter_jid", false);
+		menu.findItem(R.id.action_create_contact).setVisible(showEnterJid);
+		return true;
+	}
+
 	protected void filterContacts(final String needle) {
 		getListItems().clear();
 		for (final Account account : xmppConnectionService.getAccounts()) {
@@ -149,4 +162,62 @@ public class ChooseContactActivity extends AbstractSearchableListItemActivity {
 		return result.toArray(new String[result.size()]);
 	}
 
+
+	public void refreshUiReal() {
+		//nothing to do. This Activity doesn't implement any listeners
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(MenuItem item) {
+		switch (item.getItemId()) {
+			case R.id.action_create_contact:
+				showEnterJidDialog();
+				return true;
+		}
+		return super.onOptionsItemSelected(item);
+	}
+
+	protected void showEnterJidDialog() {
+		EnterJidDialog dialog = new EnterJidDialog(
+			this, mKnownHosts, mActivatedAccounts,
+			getString(R.string.enter_contact), getString(R.string.select),
+			null, getIntent().getStringExtra(EXTRA_ACCOUNT), true
+		);
+
+		dialog.setOnEnterJidDialogPositiveListener(new EnterJidDialog.OnEnterJidDialogPositiveListener() {
+			@Override
+			public boolean onEnterJidDialogPositive(Jid accountJid, Jid contactJid) throws EnterJidDialog.JidError {
+				final Intent request = getIntent();
+				final Intent data = new Intent();
+				data.putExtra("contact", contactJid.toString());
+				data.putExtra(EXTRA_ACCOUNT, accountJid.toString());
+				data.putExtra("conversation",
+						request.getStringExtra("conversation"));
+				data.putExtra("multiple", false);
+				setResult(RESULT_OK, data);
+				finish();
+
+				return true;
+			}
+		});
+
+		dialog.show();
+	}
+
+	@Override
+	void onBackendConnected() {
+		filterContacts();
+
+		this.mActivatedAccounts.clear();
+		for (Account account : xmppConnectionService.getAccounts()) {
+			if (account.getStatus() != Account.State.DISABLED) {
+				if (Config.DOMAIN_LOCK != null) {
+					this.mActivatedAccounts.add(account.getJid().getLocalpart());
+				} else {
+					this.mActivatedAccounts.add(account.getJid().toBareJid().toString());
+				}
+			}
+		}
+		this.mKnownHosts = xmppConnectionService.getKnownHosts();
+	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/ConferenceDetailsActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/ConferenceDetailsActivity.java
index 518041f2..c1b5ccc6 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/ConferenceDetailsActivity.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/ConferenceDetailsActivity.java
@@ -6,7 +6,6 @@ import android.app.PendingIntent;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.IntentSender.SendIntentException;
-import android.graphics.Bitmap;
 import android.os.Build;
 import android.os.Bundle;
 import android.view.ContextMenu;
@@ -19,6 +18,7 @@ import android.widget.Button;
 import android.widget.ImageButton;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
+import android.widget.TableLayout;
 import android.widget.TextView;
 import android.widget.Toast;
 
@@ -27,7 +27,9 @@ import org.openintents.openpgp.util.OpenPgpUtils;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
+import java.util.concurrent.atomic.AtomicInteger;
 
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.R;
 import de.thedevstack.conversationsplus.crypto.PgpEngine;
 import de.thedevstack.conversationsplus.entities.Account;
@@ -38,8 +40,8 @@ import de.thedevstack.conversationsplus.entities.MucOptions;
 import de.thedevstack.conversationsplus.entities.MucOptions.User;
 import de.thedevstack.conversationsplus.services.AvatarService;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
-import de.thedevstack.conversationsplus.services.XmppConnectionService.OnMucRosterUpdate;
 import de.thedevstack.conversationsplus.services.XmppConnectionService.OnConversationUpdate;
+import de.thedevstack.conversationsplus.services.XmppConnectionService.OnMucRosterUpdate;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 
 public class ConferenceDetailsActivity extends XmppActivity implements OnConversationUpdate, OnMucRosterUpdate, XmppConnectionService.OnAffiliationChanged, XmppConnectionService.OnRoleChanged, XmppConnectionService.OnConferenceOptionsPushed {
@@ -61,7 +63,11 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 	private LinearLayout membersView;
 	private LinearLayout mMoreDetails;
 	private TextView mConferenceType;
+	private TableLayout mConferenceInfoTable;
+	private TextView mConferenceInfoMam;
+	private TextView mNotifyStatusText;
 	private ImageButton mChangeConferenceSettingsButton;
+	private ImageButton mNotifyStatusButton;
 	private Button mInviteButton;
 	private String uuid = null;
 	private User mSelectedUser = null;
@@ -96,17 +102,76 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 
 		}
 	};
+
+	private OnClickListener mNotifyStatusClickListener = new OnClickListener() {
+		@Override
+		public void onClick(View v) {
+			AlertDialog.Builder builder = new AlertDialog.Builder(ConferenceDetailsActivity.this);
+			builder.setTitle(R.string.pref_notification_settings);
+			String[] choices = {
+					getString(R.string.notify_on_all_messages),
+					getString(R.string.notify_only_when_highlighted),
+					getString(R.string.notify_never)
+			};
+			final AtomicInteger choice;
+			if (mConversation.getLongAttribute(Conversation.ATTRIBUTE_MUTED_TILL,0) == Long.MAX_VALUE) {
+				choice = new AtomicInteger(2);
+			} else {
+				choice = new AtomicInteger(mConversation.alwaysNotify() ? 0 : 1);
+			}
+			builder.setSingleChoiceItems(choices, choice.get(), new DialogInterface.OnClickListener() {
+				@Override
+				public void onClick(DialogInterface dialog, int which) {
+					choice.set(which);
+				}
+			});
+			builder.setNegativeButton(R.string.cancel, null);
+			builder.setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
+				@Override
+				public void onClick(DialogInterface dialog, int which) {
+					if (choice.get() == 2) {
+						mConversation.setMutedTill(Long.MAX_VALUE);
+					} else {
+						mConversation.setMutedTill(0);
+						mConversation.setAttribute(Conversation.ATTRIBUTE_ALWAYS_NOTIFY,String.valueOf(choice.get() == 0));
+					}
+					xmppConnectionService.updateConversation(mConversation);
+					updateView();
+				}
+			});
+			builder.create().show();
+		}
+	};
+
 	private OnClickListener mChangeConferenceSettings = new OnClickListener() {
 		@Override
 		public void onClick(View v) {
 			final MucOptions mucOptions = mConversation.getMucOptions();
 			AlertDialog.Builder builder = new AlertDialog.Builder(ConferenceDetailsActivity.this);
 			builder.setTitle(R.string.conference_options);
-			String[] options = {getString(R.string.members_only),
-					getString(R.string.non_anonymous)};
-			final boolean[] values = new boolean[options.length];
-			values[0] = mucOptions.membersOnly();
-			values[1] = mucOptions.nonanonymous();
+			final String[] options;
+			final boolean[] values;
+			if (mAdvancedMode) {
+				options = new String[]{
+						getString(R.string.members_only),
+						getString(R.string.moderated),
+						getString(R.string.non_anonymous)
+				};
+				values = new boolean[]{
+						mucOptions.membersOnly(),
+						mucOptions.moderated(),
+						mucOptions.nonanonymous()
+				};
+			} else {
+				options = new String[]{
+						getString(R.string.members_only),
+						getString(R.string.non_anonymous)
+				};
+				values = new boolean[]{
+						mucOptions.membersOnly(),
+						mucOptions.nonanonymous()
+				};
+			}
 			builder.setMultiChoiceItems(options,values,new DialogInterface.OnMultiChoiceClickListener() {
 				@Override
 				public void onClick(DialogInterface dialog, int which, boolean isChecked) {
@@ -124,7 +189,12 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 					}
 					Bundle options = new Bundle();
 					options.putString("muc#roomconfig_membersonly", values[0] ? "1" : "0");
-					options.putString("muc#roomconfig_whois", values[1] ? "anyone" : "moderators");
+					if (values.length == 2) {
+						options.putString("muc#roomconfig_whois", values[1] ? "anyone" : "moderators");
+					} else if (values.length == 3) {
+						options.putString("muc#roomconfig_moderatedroom", values[1] ? "1" : "0");
+						options.putString("muc#roomconfig_whois", values[2] ? "anyone" : "moderators");
+					}
 					options.putString("muc#roomconfig_persistentroom", "1");
 					xmppConnectionService.pushConferenceConfiguration(mConversation,
 							options,
@@ -171,7 +241,6 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 		mMoreDetails.setVisibility(View.GONE);
 		mChangeConferenceSettingsButton = (ImageButton) findViewById(R.id.change_conference_button);
 		mChangeConferenceSettingsButton.setOnClickListener(this.mChangeConferenceSettings);
-		mConferenceType = (TextView) findViewById(R.id.muc_conference_type);
 		mInviteButton = (Button) findViewById(R.id.invite);
 		mInviteButton.setOnClickListener(inviteListener);
 		mConferenceType = (TextView) findViewById(R.id.muc_conference_type);
@@ -193,6 +262,13 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 						});
 			}
 		});
+		this.mAdvancedMode = getPreferences().getBoolean("advanced_muc_mode", false);
+		this.mConferenceInfoTable = (TableLayout) findViewById(R.id.muc_info_more);
+		mConferenceInfoTable.setVisibility(this.mAdvancedMode ? View.VISIBLE : View.GONE);
+		this.mConferenceInfoMam = (TextView) findViewById(R.id.muc_info_mam);
+		this.mNotifyStatusButton = (ImageButton) findViewById(R.id.notification_status_button);
+		this.mNotifyStatusButton.setOnClickListener(this.mNotifyStatusClickListener);
+		this.mNotifyStatusText = (TextView) findViewById(R.id.notification_status_text);
 	}
 
 	@Override
@@ -215,6 +291,8 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 			case R.id.action_advanced_mode:
 				this.mAdvancedMode = !menuItem.isChecked();
 				menuItem.setChecked(this.mAdvancedMode);
+				getPreferences().edit().putBoolean("advanced_muc_mode", mAdvancedMode).commit();
+				mConferenceInfoTable.setVisibility(this.mAdvancedMode ? View.VISIBLE : View.GONE);
 				invalidateOptionsMenu();
 				updateView();
 				break;
@@ -236,6 +314,7 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 		MenuItem menuItemSaveBookmark = menu.findItem(R.id.action_save_as_bookmark);
 		MenuItem menuItemDeleteBookmark = menu.findItem(R.id.action_delete_bookmark);
 		MenuItem menuItemAdvancedMode = menu.findItem(R.id.action_advanced_mode);
+		MenuItem menuItemChangeSubject = menu.findItem(R.id.action_edit_subject);
 		menuItemAdvancedMode.setChecked(mAdvancedMode);
 		if (mConversation == null) {
 			return true;
@@ -248,6 +327,7 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 			menuItemDeleteBookmark.setVisible(false);
 			menuItemSaveBookmark.setVisible(true);
 		}
+		menuItemChangeSubject.setVisible(mConversation.getMucOptions().canChangeSubject());
 		return true;
 	}
 
@@ -266,14 +346,17 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 			final User self = mConversation.getMucOptions().getSelf();
 			this.mSelectedUser = user;
 			String name;
+			final Contact contact = user.getContact();
+			if (contact != null) {
+				name = contact.getDisplayName();
+			} else if (user.getJid() != null){
+				name = user.getJid().toBareJid().toString();
+			} else {
+				name = user.getName();
+			}
+			menu.setHeaderTitle(name);
 			if (user.getJid() != null) {
-				final Contact contact = user.getContact();
-				if (contact != null) {
-					name = contact.getDisplayName();
-				} else {
-					name = user.getJid().toBareJid().toString();
-				}
-				menu.setHeaderTitle(name);
+				MenuItem showContactDetails = menu.findItem(R.id.action_contact_details);
 				MenuItem startConversation = menu.findItem(R.id.start_conversation);
 				MenuItem giveMembership = menu.findItem(R.id.give_membership);
 				MenuItem removeMembership = menu.findItem(R.id.remove_membership);
@@ -282,6 +365,9 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 				MenuItem removeFromRoom = menu.findItem(R.id.remove_from_room);
 				MenuItem banFromConference = menu.findItem(R.id.ban_from_conference);
 				startConversation.setVisible(true);
+				if (contact != null) {
+					showContactDetails.setVisible(true);
+				}
 				if (self.getAffiliation().ranks(MucOptions.Affiliation.ADMIN) &&
 						self.getAffiliation().outranks(user.getAffiliation())) {
 					if (mAdvancedMode) {
@@ -300,15 +386,24 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 						removeAdminPrivileges.setVisible(true);
 					}
 				}
+			} else {
+				MenuItem sendPrivateMessage = menu.findItem(R.id.send_private_message);
+				sendPrivateMessage.setVisible(true);
 			}
 
 		}
-		super.onCreateContextMenu(menu,v,menuInfo);
+		super.onCreateContextMenu(menu, v, menuInfo);
 	}
 
 	@Override
 	public boolean onContextItemSelected(MenuItem item) {
 		switch (item.getItemId()) {
+			case R.id.action_contact_details:
+				Contact contact = mSelectedUser.getContact();
+				if (contact != null) {
+					switchToContactDetails(contact);
+				}
+				return true;
 			case R.id.start_conversation:
 				startConversation(mSelectedUser);
 				return true;
@@ -331,6 +426,9 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 				xmppConnectionService.changeAffiliationInConference(mConversation,mSelectedUser.getJid(), MucOptions.Affiliation.OUTCAST,this);
 				xmppConnectionService.changeRoleInConference(mConversation,mSelectedUser.getName(), MucOptions.Role.NONE,this);
 				return true;
+			case R.id.send_private_message:
+				privateMsgInMuc(mConversation,mSelectedUser.getName());
+				return true;
 			default:
 				return super.onContextItemSelected(item);
 		}
@@ -369,7 +467,8 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 		if (!mConversation.getJid().isBareJid()) {
 			bookmark.setNick(mConversation.getJid().getResourcepart());
 		}
-		bookmark.setAutojoin(true);
+		bookmark.setBookmarkName(mConversation.getMucOptions().getSubject());
+		bookmark.setAutojoin(getPreferences().getBoolean("autojoin",true));
 		account.getBookmarks().add(bookmark);
 		xmppConnectionService.pushBookmarks(account);
 		mConversation.setBookmark(bookmark);
@@ -404,11 +503,20 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 	private void updateView() {
 		final MucOptions mucOptions = mConversation.getMucOptions();
 		final User self = mucOptions.getSelf();
-		mAccountJid.setText(getString(R.string.using_account, mConversation
-					.getAccount().getJid().toBareJid()));
+		String account;
+		if (Config.DOMAIN_LOCK != null) {
+			account = mConversation.getAccount().getJid().getLocalpart();
+		} else {
+			account = mConversation.getAccount().getJid().toBareJid().toString();
+		}
+		mAccountJid.setText(getString(R.string.using_account, account));
 		mYourPhoto.setImageBitmap(AvatarService.getInstance().get(mConversation.getAccount(), getPixel(48)));
 		setTitle(mConversation.getName());
-		mFullJid.setText(mConversation.getJid().toBareJid().toString());
+		if (Config.LOCK_DOMAINS_IN_CONVERSATIONS && mConversation.getJid().getDomainpart().equals(Config.CONFERENCE_DOMAIN_LOCK)) {
+			mFullJid.setText(mConversation.getJid().getLocalpart());
+		} else {
+			mFullJid.setText(mConversation.getJid().toBareJid().toString());
+		}
 		mYourNick.setText(mucOptions.getActualNick());
 		mRoleAffiliaton = (TextView) findViewById(R.id.muc_role);
 		if (mucOptions.online()) {
@@ -425,16 +533,36 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 			} else {
 				mConferenceType.setText(R.string.public_conference);
 			}
+			if (mucOptions.mamSupport()) {
+				mConferenceInfoMam.setText(R.string.server_info_available);
+			} else {
+				mConferenceInfoMam.setText(R.string.server_info_unavailable);
+			}
 			if (self.getAffiliation().ranks(MucOptions.Affiliation.OWNER)) {
 				mChangeConferenceSettingsButton.setVisibility(View.VISIBLE);
 			} else {
 				mChangeConferenceSettingsButton.setVisibility(View.GONE);
 			}
 		}
+
+		long mutedTill = mConversation.getLongAttribute(Conversation.ATTRIBUTE_MUTED_TILL,0);
+		if (mutedTill == Long.MAX_VALUE) {
+			mNotifyStatusText.setText(R.string.notify_never);
+			mNotifyStatusButton.setImageResource(R.drawable.ic_notifications_off_grey600_24dp);
+		} else if (System.currentTimeMillis() < mutedTill) {
+			mNotifyStatusText.setText(R.string.notify_paused);
+			mNotifyStatusButton.setImageResource(R.drawable.ic_notifications_paused_grey600_24dp);
+		} else if (mConversation.alwaysNotify()) {
+			mNotifyStatusButton.setImageResource(R.drawable.ic_notifications_grey600_24dp);
+			mNotifyStatusText.setText(R.string.notify_on_all_messages);
+		} else {
+			mNotifyStatusButton.setImageResource(R.drawable.ic_notifications_none_grey600_24dp);
+			mNotifyStatusText.setText(R.string.notify_only_when_highlighted);
+		}
+
 		LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
 		membersView.removeAllViews();
-		final ArrayList<User> users = new ArrayList<>();
-		users.addAll(mConversation.getMucOptions().getUsers());
+		final ArrayList<User> users = mucOptions.getUsers();
 		Collections.sort(users,new Comparator<User>() {
 			@Override
 			public int compare(User lhs, User rhs) {
@@ -466,20 +594,17 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 				});
 				tvKey.setText(OpenPgpUtils.convertKeyIdToHex(user.getPgpKeyId()));
 			}
-			Bitmap bm;
 			Contact contact = user.getContact();
 			if (contact != null) {
-				bm = AvatarService.getInstance().get(contact, getPixel(48));
 				tvDisplayName.setText(contact.getDisplayName());
 				tvStatus.setText(user.getName() + " \u2022 " + getStatus(user));
 			} else {
-				bm = AvatarService.getInstance().get(user.getName(), getPixel(48));
 				tvDisplayName.setText(user.getName());
 				tvStatus.setText(getStatus(user));
 
 			}
 			ImageView iv = (ImageView) view.findViewById(R.id.contact_photo);
-			iv.setImageBitmap(bm);
+			iv.setImageBitmap(AvatarService.getInstance().get(user, getPixel(48), false));
 			membersView.addView(view);
 			if (mConversation.getMucOptions().canInvite()) {
 				mInviteButton.setVisibility(View.VISIBLE);
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/ContactDetailsActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/ContactDetailsActivity.java
index a61d0b4b..aaa19fc5 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/ContactDetailsActivity.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/ContactDetailsActivity.java
@@ -25,29 +25,35 @@ import android.widget.ImageButton;
 import android.widget.LinearLayout;
 import android.widget.QuickContactBadge;
 import android.widget.TextView;
+import android.widget.Toast;
 
 import org.openintents.openpgp.util.OpenPgpUtils;
 
+import java.security.cert.X509Certificate;
 import java.util.List;
 
 import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
+import de.thedevstack.conversationsplus.ui.listeners.ShowResourcesListDialogListener;
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.R;
 import de.thedevstack.conversationsplus.crypto.PgpEngine;
+import de.thedevstack.conversationsplus.crypto.axolotl.AxolotlService;
+import de.thedevstack.conversationsplus.crypto.axolotl.XmppAxolotlSession;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Contact;
 import de.thedevstack.conversationsplus.entities.ListItem;
 import de.thedevstack.conversationsplus.services.AvatarService;
 import de.thedevstack.conversationsplus.services.XmppConnectionService.OnAccountUpdate;
 import de.thedevstack.conversationsplus.services.XmppConnectionService.OnRosterUpdate;
-import de.thedevstack.conversationsplus.ui.listeners.ShowResourcesListDialogListener;
 import de.thedevstack.conversationsplus.utils.CryptoHelper;
 import de.thedevstack.conversationsplus.utils.UIHelper;
+import de.thedevstack.conversationsplus.xmpp.OnKeyStatusUpdated;
 import de.thedevstack.conversationsplus.xmpp.OnUpdateBlocklist;
 import de.thedevstack.conversationsplus.xmpp.XmppConnection;
 import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 
-public class ContactDetailsActivity extends XmppActivity implements OnAccountUpdate, OnRosterUpdate, OnUpdateBlocklist {
+public class ContactDetailsActivity extends XmppActivity implements OnAccountUpdate, OnRosterUpdate, OnUpdateBlocklist, OnKeyStatusUpdated {
 	public static final String ACTION_VIEW_CONTACT = "view_contact";
 
 	private Contact contact;
@@ -109,6 +115,7 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 	private LinearLayout keys;
 	private LinearLayout tags;
 	private boolean showDynamicTags;
+	private String messageFingerprint;
 
 	private DialogInterface.OnClickListener addToPhonebook = new DialogInterface.OnClickListener() {
 
@@ -133,7 +140,7 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 						ContactDetailsActivity.this);
 				builder.setTitle(getString(R.string.action_add_phone_book));
 				builder.setMessage(getString(R.string.add_phone_book_text,
-						contact.getJid()));
+						contact.getDisplayJid()));
 				builder.setNegativeButton(getString(R.string.cancel), null);
 				builder.setPositiveButton(getString(R.string.add), addToPhonebook);
 				builder.create().show();
@@ -159,6 +166,11 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 	}
 
 	@Override
+	public void OnUpdateBlocklist(final Status status) {
+		refreshUi();
+	}
+
+	@Override
 	protected void refreshUiReal() {
 		invalidateOptionsMenu();
 		populateView();
@@ -178,7 +190,7 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 		super.onCreate(savedInstanceState);
 		if (getIntent().getAction().equals(ACTION_VIEW_CONTACT)) {
 			try {
-				this.accountJid = Jid.fromString(getIntent().getExtras().getString("account"));
+				this.accountJid = Jid.fromString(getIntent().getExtras().getString(EXTRA_ACCOUNT));
 			} catch (final InvalidJidException ignored) {
 			}
 			try {
@@ -186,6 +198,7 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 			} catch (final InvalidJidException ignored) {
 			}
 		}
+		this.messageFingerprint = getIntent().getStringExtra("fingerprint");
 		setContentView(R.layout.activity_contact_details);
 
 		contactJidTv = (TextView) findViewById(R.id.details_contactjid);
@@ -223,7 +236,7 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 				builder.setTitle(getString(R.string.action_delete_contact))
 					.setMessage(
 							getString(R.string.remove_contact_text,
-								contact.getJid()))
+								contact.getDisplayJid()))
 					.setPositiveButton(getString(R.string.delete),
 							removeFromRoster).create().show();
 				break;
@@ -345,13 +358,19 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 		}
 
 		if (contact.getPresences().size() > 1) {
-			contactJidTv.setText(contact.getJid() + " ("
+			contactJidTv.setText(contact.getDisplayJid() + " ("
 					+ contact.getPresences().size() + ")");
 		} else {
-			contactJidTv.setText(contact.getJid().toString());
+			contactJidTv.setText(contact.getDisplayJid());
+		}
+		String account;
+		if (Config.DOMAIN_LOCK != null) {
+			account = contact.getAccount().getJid().getLocalpart();
+		} else {
+			account = contact.getAccount().getJid().toBareJid().toString();
 		}
 		contactJidTv.setOnClickListener(new ShowResourcesListDialogListener(ContactDetailsActivity.this, contact));
-		accountJidTv.setText(getString(R.string.using_account, contact.getAccount().getJid().toBareJid()));
+		accountJidTv.setText(getString(R.string.using_account, account));
 		badge.setImageBitmap(AvatarService.getInstance().get(contact, getPixel(72)));
 		badge.setOnClickListener(this.onBadgeClick);
 
@@ -363,13 +382,13 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 			View view = inflater.inflate(R.layout.contact_key, keys, false);
 			TextView key = (TextView) view.findViewById(R.id.key);
 			TextView keyType = (TextView) view.findViewById(R.id.key_type);
-			ImageButton remove = (ImageButton) view
+			ImageButton removeButton = (ImageButton) view
 				.findViewById(R.id.button_remove);
-			remove.setVisibility(View.VISIBLE);
+			removeButton.setVisibility(View.VISIBLE);
 			keyType.setText("OTR Fingerprint");
 			key.setText(CryptoHelper.prettifyFingerprint(otrFingerprint));
 			keys.addView(view);
-			remove.setOnClickListener(new OnClickListener() {
+			removeButton.setOnClickListener(new OnClickListener() {
 
 				@Override
 				public void onClick(View v) {
@@ -377,6 +396,15 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 				}
 			});
 		}
+		for (final String fingerprint : contact.getAccount().getAxolotlService().getFingerprintsForContact(contact)) {
+			boolean highlight = fingerprint.equals(messageFingerprint);
+			hasKeys |= addFingerprintRow(keys, contact.getAccount(), fingerprint, highlight, new OnClickListener() {
+				@Override
+				public void onClick(View v) {
+					onOmemoKeyClicked(contact.getAccount(), fingerprint);
+				}
+			});
+		}
 		if (contact.getPgpKeyId() != 0) {
 			hasKeys = true;
 			View view = inflater.inflate(R.layout.contact_key, keys, false);
@@ -427,6 +455,40 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 		}
 	}
 
+	private void onOmemoKeyClicked(Account account, String fingerprint) {
+		final XmppAxolotlSession.Trust trust = account.getAxolotlService().getFingerprintTrust(fingerprint);
+		if (trust != null && trust == XmppAxolotlSession.Trust.TRUSTED_X509) {
+			X509Certificate x509Certificate = account.getAxolotlService().getFingerprintCertificate(fingerprint);
+			if (x509Certificate != null) {
+				showCertificateInformationDialog(CryptoHelper.extractCertificateInformation(x509Certificate));
+			} else {
+				Toast.makeText(this,R.string.certificate_not_found, Toast.LENGTH_SHORT).show();
+			}
+		}
+	}
+
+	private void showCertificateInformationDialog(Bundle bundle) {
+		View view = getLayoutInflater().inflate(R.layout.certificate_information, null);
+		final String not_available = getString(R.string.certicate_info_not_available);
+		TextView subject_cn = (TextView) view.findViewById(R.id.subject_cn);
+		TextView subject_o = (TextView) view.findViewById(R.id.subject_o);
+		TextView issuer_cn = (TextView) view.findViewById(R.id.issuer_cn);
+		TextView issuer_o = (TextView) view.findViewById(R.id.issuer_o);
+		TextView sha1 = (TextView) view.findViewById(R.id.sha1);
+
+		subject_cn.setText(bundle.getString("subject_cn", not_available));
+		subject_o.setText(bundle.getString("subject_o", not_available));
+		issuer_cn.setText(bundle.getString("issuer_cn", not_available));
+		issuer_o.setText(bundle.getString("issuer_o", not_available));
+		sha1.setText(bundle.getString("sha1", not_available));
+
+		AlertDialog.Builder builder = new AlertDialog.Builder(this);
+		builder.setTitle(R.string.certificate_information);
+		builder.setView(view);
+		builder.setPositiveButton(R.string.ok, null);
+		builder.create().show();
+	}
+
 	protected void confirmToDeleteFingerprint(final String fingerprint) {
 		AlertDialog.Builder builder = new AlertDialog.Builder(this);
 		builder.setTitle(R.string.delete_fingerprint);
@@ -461,14 +523,7 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 	}
 
 	@Override
-	public void OnUpdateBlocklist(final Status status) {
-		runOnUiThread(new Runnable() {
-
-			@Override
-			public void run() {
-				invalidateOptionsMenu();
-				populateView();
-			}
-		});
+	public void onKeyStatusUpdated(AxolotlService.FetchStatus report) {
+		refreshUi();
 	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/ConversationActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/ConversationActivity.java
index 94d1e2ea..1a4ccb8c 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/ConversationActivity.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/ConversationActivity.java
@@ -10,14 +10,21 @@ import android.content.DialogInterface;
 import android.content.DialogInterface.OnClickListener;
 import android.content.Intent;
 import android.content.IntentSender.SendIntentException;
+import android.content.pm.PackageManager;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
 import android.provider.MediaStore;
+import android.provider.Settings;
 import android.support.v4.widget.SlidingPaneLayout;
 import android.support.v4.widget.SlidingPaneLayout.PanelSlideListener;
+import android.util.Log;
+import android.util.Pair;
+import android.view.Gravity;
+import android.view.KeyEvent;
 import android.view.Menu;
 import android.view.MenuItem;
+import android.view.Surface;
 import android.view.View;
 import android.widget.AdapterView;
 import android.widget.AdapterView.OnItemClickListener;
@@ -29,22 +36,29 @@ import android.widget.Toast;
 
 import net.java.otr4j.session.SessionStatus;
 
-import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
-import de.thedevstack.conversationsplus.persistance.FileBackend;
-import de.thedevstack.conversationsplus.ui.dialogs.UserDecisionDialog;
-import de.thedevstack.conversationsplus.ui.listeners.ResizePictureUserDecisionListener;
-import de.timroes.android.listview.EnhancedListView;
+import org.openintents.openpgp.util.OpenPgpApi;
 
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
+import java.util.concurrent.atomic.AtomicBoolean;
 
+import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
+import de.thedevstack.conversationsplus.ui.dialogs.UserDecisionDialog;
+import de.thedevstack.conversationsplus.ui.listeners.ResizePictureUserDecisionListener;
+import de.timroes.android.listview.EnhancedListView;
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.crypto.axolotl.AxolotlService;
+import de.thedevstack.conversationsplus.crypto.axolotl.AxolotlServiceImpl;
+import de.thedevstack.conversationsplus.crypto.axolotl.XmppAxolotlSession;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Blockable;
 import de.thedevstack.conversationsplus.entities.Contact;
 import de.thedevstack.conversationsplus.entities.Conversation;
 import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.entities.Transferable;
+import de.thedevstack.conversationsplus.persistance.FileBackend;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
 import de.thedevstack.conversationsplus.services.XmppConnectionService.OnAccountUpdate;
 import de.thedevstack.conversationsplus.services.XmppConnectionService.OnConversationUpdate;
@@ -52,26 +66,33 @@ import de.thedevstack.conversationsplus.services.XmppConnectionService.OnRosterU
 import de.thedevstack.conversationsplus.ui.adapter.ConversationAdapter;
 import de.thedevstack.conversationsplus.utils.ExceptionHelper;
 import de.thedevstack.conversationsplus.xmpp.OnUpdateBlocklist;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 
 public class ConversationActivity extends XmppActivity
 	implements OnAccountUpdate, OnConversationUpdate, OnRosterUpdate, OnUpdateBlocklist, XmppConnectionService.OnShowErrorToast {
 
-	public static final String ACTION_DOWNLOAD = "de.thedevstack.conversationsplus.action.DOWNLOAD";
+	public static final String ACTION_DOWNLOAD = "eu.siacs.conversations.action.DOWNLOAD";
 
 	public static final String VIEW_CONVERSATION = "viewConversation";
 	public static final String CONVERSATION = "conversationUuid";
 	public static final String MESSAGE = "messageUuid";
 	public static final String TEXT = "text";
 	public static final String NICK = "nick";
+	public static final String PRIVATE_MESSAGE = "pm";
 
 	public static final int REQUEST_SEND_MESSAGE = 0x0201;
 	public static final int REQUEST_DECRYPT_PGP = 0x0202;
 	public static final int REQUEST_ENCRYPT_MESSAGE = 0x0207;
+	public static final int REQUEST_TRUST_KEYS_TEXT = 0x0208;
+	public static final int REQUEST_TRUST_KEYS_MENU = 0x0209;
+	public static final int REQUEST_START_DOWNLOAD = 0x0210;
 	public static final int ATTACHMENT_CHOICE_CHOOSE_IMAGE = 0x0301;
 	public static final int ATTACHMENT_CHOICE_TAKE_PHOTO = 0x0302;
 	public static final int ATTACHMENT_CHOICE_CHOOSE_FILE = 0x0303;
 	public static final int ATTACHMENT_CHOICE_RECORD_VOICE = 0x0304;
 	public static final int ATTACHMENT_CHOICE_LOCATION = 0x0305;
+	public static final int ATTACHMENT_CHOICE_INVALID = 0x0306;
 	private static final String STATE_OPEN_CONVERSATION = "state_open_conversation";
 	private static final String STATE_PANEL_OPEN = "state_panel_open";
 	private static final String STATE_PENDING_URI = "state_pending_uri";
@@ -81,6 +102,10 @@ public class ConversationActivity extends XmppActivity
 	final private List<Uri> mPendingImageUris = new ArrayList<>();
 	final private List<Uri> mPendingFileUris = new ArrayList<>();
 	private Uri mPendingGeoUri = null;
+	private boolean forbidProcessingPendings = false;
+	private Message mPendingDownloadableMessage = null;
+
+	private boolean conversationWasSelectedByKeyboard = false;
 
 	private View mContentView;
 
@@ -92,10 +117,9 @@ public class ConversationActivity extends XmppActivity
 
 	private ArrayAdapter<Conversation> listAdapter;
 
-	private Toast prepareFileToast;
-
 	private boolean mActivityPaused = false;
-	private boolean mRedirected = true;
+	private AtomicBoolean mRedirected = new AtomicBoolean(false);
+	private Pair<Integer, Intent> mPostponedActivityResult;
 
 	public Conversation getSelectedConversation() {
 		return this.mSelectedConversation;
@@ -131,8 +155,7 @@ public class ConversationActivity extends XmppActivity
 
 	public boolean isConversationsOverviewHideable() {
 		if (mContentView instanceof SlidingPaneLayout) {
-			SlidingPaneLayout mSlidingPaneLayout = (SlidingPaneLayout) mContentView;
-			return mSlidingPaneLayout.isSlideable();
+			return true;
 		} else {
 			return false;
 		}
@@ -180,10 +203,11 @@ public class ConversationActivity extends XmppActivity
 
 			@Override
 			public void onItemClick(AdapterView<?> arg0, View clickedView,
-					int position, long arg3) {
+									int position, long arg3) {
 				if (getSelectedConversation() != conversationList.get(position)) {
 					setSelectedConversation(conversationList.get(position));
 					ConversationActivity.this.mConversationFragment.reInit(getSelectedConversation());
+					conversationWasSelectedByKeyboard = false;
 				}
 				hideConversationsOverview();
 				openConversation();
@@ -192,64 +216,67 @@ public class ConversationActivity extends XmppActivity
 
 		listView.setDismissCallback(new EnhancedListView.OnDismissCallback() {
 
-            @Override
-            public EnhancedListView.Undoable onDismiss(final EnhancedListView enhancedListView, final int position) {
-
-                final int index = listView.getFirstVisiblePosition();
-                View v = listView.getChildAt(0);
-                final int top = (v == null) ? 0 : (v.getTop() - listView.getPaddingTop());
-
-                swipedConversation = listAdapter.getItem(position);
-                listAdapter.remove(swipedConversation);
-                swipedConversation.markRead();
-                xmppConnectionService.getNotificationService().clear(swipedConversation);
-
-                final boolean formerlySelected = (getSelectedConversation() == swipedConversation);
-                if (position == 0 && listAdapter.getCount() == 0) {
-                    endConversation(swipedConversation, false, true);
-                    return null;
-                } else if (formerlySelected) {
-                    setSelectedConversation(listAdapter.getItem(0));
-                    ConversationActivity.this.mConversationFragment
-                            .reInit(getSelectedConversation());
-                }
+			@Override
+			public EnhancedListView.Undoable onDismiss(final EnhancedListView enhancedListView, final int position) {
 
-                return new EnhancedListView.Undoable() {
+				final int index = listView.getFirstVisiblePosition();
+				View v = listView.getChildAt(0);
+				final int top = (v == null) ? 0 : (v.getTop() - listView.getPaddingTop());
 
-                    @Override
-                    public void undo() {
-                        listAdapter.insert(swipedConversation, position);
-                        if (formerlySelected) {
-                            setSelectedConversation(swipedConversation);
-                            ConversationActivity.this.mConversationFragment
-                                    .reInit(getSelectedConversation());
-                        }
-                        swipedConversation = null;
-                        listView.setSelectionFromTop(index + (listView.getChildCount() < position ? 1 : 0), top);
-                    }
+				try {
+					swipedConversation = listAdapter.getItem(position);
+				} catch (IndexOutOfBoundsException e) {
+					return null;
+				}
+				listAdapter.remove(swipedConversation);
+				xmppConnectionService.markRead(swipedConversation);
+
+				final boolean formerlySelected = (getSelectedConversation() == swipedConversation);
+				if (position == 0 && listAdapter.getCount() == 0) {
+					endConversation(swipedConversation, false, true);
+					return null;
+				} else if (formerlySelected) {
+					setSelectedConversation(listAdapter.getItem(0));
+					ConversationActivity.this.mConversationFragment
+							.reInit(getSelectedConversation());
+				}
 
-                    @Override
-                    public void discard() {
-                        if (!swipedConversation.isRead()
-                                && swipedConversation.getMode() == Conversation.MODE_SINGLE) {
-                            swipedConversation = null;
-                            return;
-                        }
-                        endConversation(swipedConversation, false, false);
-                        swipedConversation = null;
-                    }
+				return new EnhancedListView.Undoable() {
 
-                    @Override
-                    public String getTitle() {
-                        if (swipedConversation.getMode() == Conversation.MODE_MULTI) {
-                            return getResources().getString(R.string.title_undo_swipe_out_muc);
-                        } else {
-                            return getResources().getString(R.string.title_undo_swipe_out_conversation);
-                        }
-                    }
-                };
-            }
-        });
+					@Override
+					public void undo() {
+						listAdapter.insert(swipedConversation, position);
+						if (formerlySelected) {
+							setSelectedConversation(swipedConversation);
+							ConversationActivity.this.mConversationFragment
+									.reInit(getSelectedConversation());
+						}
+						swipedConversation = null;
+						listView.setSelectionFromTop(index + (listView.getChildCount() < position ? 1 : 0), top);
+					}
+
+					@Override
+					public void discard() {
+						if (!swipedConversation.isRead()
+								&& swipedConversation.getMode() == Conversation.MODE_SINGLE) {
+							swipedConversation = null;
+							return;
+						}
+						endConversation(swipedConversation, false, false);
+						swipedConversation = null;
+					}
+
+					@Override
+					public String getTitle() {
+						if (swipedConversation.getMode() == Conversation.MODE_MULTI) {
+							return getResources().getString(R.string.title_undo_swipe_out_muc);
+						} else {
+							return getResources().getString(R.string.title_undo_swipe_out_conversation);
+						}
+					}
+				};
+			}
+		});
 		listView.enableSwipeToDismiss();
         listView.setSwipeDirection(EnhancedListView.SwipeDirection.START);
 		listView.setSwipingLayout(R.id.swipeable_item);
@@ -277,7 +304,7 @@ public class ConversationActivity extends XmppActivity
 					hideKeyboard();
 					if (xmppConnectionServiceBound) {
 						xmppConnectionService.getNotificationService()
-							.setOpenConversation(null);
+								.setOpenConversation(null);
 					}
 					closeContextMenu();
 				}
@@ -301,12 +328,12 @@ public class ConversationActivity extends XmppActivity
 	public void switchToConversation(Conversation conversation) {
 		setSelectedConversation(conversation);
 		runOnUiThread(new Runnable() {
-            @Override
-            public void run() {
-                ConversationActivity.this.mConversationFragment.reInit(getSelectedConversation());
-                openConversation();
-            }
-        });
+			@Override
+			public void run() {
+				ConversationActivity.this.mConversationFragment.reInit(getSelectedConversation());
+				openConversation();
+			}
+		});
 	}
 
 	private void updateActionBarTitle() {
@@ -346,11 +373,7 @@ public class ConversationActivity extends XmppActivity
 
 	public void sendReadMarkerIfNecessary(final Conversation conversation) {
 		if (!mActivityPaused && conversation != null) {
-			if (!conversation.isRead()) {
-				xmppConnectionService.sendReadMarker(conversation);
-			} else {
-				xmppConnectionService.markRead(conversation);
-			}
+			xmppConnectionService.sendReadMarker(conversation);
 		}
 	}
 
@@ -381,7 +404,7 @@ public class ConversationActivity extends XmppActivity
 		} else {
 			menuAdd.setVisible(!isConversationsOverviewHideable());
 			if (this.getSelectedConversation() != null) {
-				if (this.getSelectedConversation().getNextEncryption(ConversationsPlusPreferences.forceEncryption()) != Message.ENCRYPTION_NONE) {
+				if (this.getSelectedConversation().getNextEncryption() != Message.ENCRYPTION_NONE) {
 					if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
 						menuSecure.setIcon(R.drawable.ic_lock_white_24dp);
 					} else {
@@ -390,10 +413,12 @@ public class ConversationActivity extends XmppActivity
 				}
 				if (this.getSelectedConversation().getMode() == Conversation.MODE_MULTI) {
 					menuContactDetails.setVisible(false);
-					menuAttach.setVisible(getSelectedConversation().getAccount().httpUploadAvailable());
+					menuAttach.setVisible(getSelectedConversation().getAccount().httpUploadAvailable() && getSelectedConversation().getMucOptions().participating());
 					menuInviteContact.setVisible(getSelectedConversation().getMucOptions().canInvite());
+					menuSecure.setVisible(Config.supportOpenPgp() && Config.multipleEncryptionChoices()); //only if pgp is supported we have a choice
 				} else {
 					menuMucDetails.setVisible(false);
+					menuSecure.setVisible(Config.multipleEncryptionChoices());
 				}
 				if (this.getSelectedConversation().isMuted()) {
 					menuMute.setVisible(false);
@@ -405,7 +430,7 @@ public class ConversationActivity extends XmppActivity
 		return true;
 	}
 
-	private void selectPresenceToAttachFile(final int attachmentChoice, final int encryption) {
+	protected void selectPresenceToAttachFile(final int attachmentChoice, final int encryption) {
 		final Conversation conversation = getSelectedConversation();
 		final Account account = conversation.getAccount();
 		final OnPresenceSelected callback = new OnPresenceSelected() {
@@ -419,7 +444,7 @@ public class ConversationActivity extends XmppActivity
 					case ATTACHMENT_CHOICE_CHOOSE_IMAGE:
 						intent.setAction(Intent.ACTION_GET_CONTENT);
 						if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
-							intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE,true);
+							intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
 						}
 						intent.setType("image/*");
 						chooser = true;
@@ -439,11 +464,11 @@ public class ConversationActivity extends XmppActivity
 						break;
 					case ATTACHMENT_CHOICE_RECORD_VOICE:
 						intent.setAction(MediaStore.Audio.Media.RECORD_SOUND_ACTION);
-						fallbackPackageId = "de.thedevstack.conversationsplus.voicerecorder";
+						fallbackPackageId = "eu.siacs.conversations.voicerecorder";
 						break;
 					case ATTACHMENT_CHOICE_LOCATION:
-						intent.setAction("de.thedevstack.conversationsplus.location.request");
-						fallbackPackageId = "de.thedevstack.conversationsplus.sharelocation";
+						intent.setAction("eu.siacs.conversations.location.request");
+						fallbackPackageId = "eu.siacs.conversations.sharelocation";
 						break;
 				}
 				if (intent.resolveActivity(getPackageManager()) != null) {
@@ -469,7 +494,7 @@ public class ConversationActivity extends XmppActivity
 
 	private Intent getInstallApkIntent(final String packageId) {
 		Intent intent = new Intent(Intent.ACTION_VIEW);
-		intent.setData(Uri.parse("market://details?id="+packageId));
+		intent.setData(Uri.parse("market://details?id=" + packageId));
 		if (intent.resolveActivity(getPackageManager()) != null) {
 			return intent;
 		} else {
@@ -479,6 +504,11 @@ public class ConversationActivity extends XmppActivity
 	}
 
 	public void attachFile(final int attachmentChoice) {
+		if (attachmentChoice != ATTACHMENT_CHOICE_LOCATION) {
+			if (!hasStoragePermission(attachmentChoice)) {
+				return;
+			}
+		}
 		switch (attachmentChoice) {
 			case ATTACHMENT_CHOICE_LOCATION:
 				ConversationsPlusPreferences.applyRecentlyUsedQuickAction("location");
@@ -494,23 +524,23 @@ public class ConversationActivity extends XmppActivity
 				break;
 		}
 		final Conversation conversation = getSelectedConversation();
-		final int encryption = conversation.getNextEncryption(ConversationsPlusPreferences.forceEncryption());
+		final int encryption = conversation.getNextEncryption();
+		final int mode = conversation.getMode();
 		if (encryption == Message.ENCRYPTION_PGP) {
 			if (hasPgp()) {
-				if (conversation.getContact().getPgpKeyId() != 0) {
+				if (mode == Conversation.MODE_SINGLE && conversation.getContact().getPgpKeyId() != 0) {
 					xmppConnectionService.getPgpEngine().hasKey(
 							conversation.getContact(),
 							new UiCallback<Contact>() {
 
 								@Override
-								public void userInputRequried(PendingIntent pi,
-										Contact contact) {
-									ConversationActivity.this.runIntent(pi,attachmentChoice);
+								public void userInputRequried(PendingIntent pi, Contact contact) {
+									ConversationActivity.this.runIntent(pi, attachmentChoice);
 								}
 
 								@Override
 								public void success(Contact contact) {
-									selectPresenceToAttachFile(attachmentChoice,encryption);
+									selectPresenceToAttachFile(attachmentChoice, encryption);
 								}
 
 								@Override
@@ -518,21 +548,31 @@ public class ConversationActivity extends XmppActivity
 									displayErrorDialog(error);
 								}
 							});
+				} else if (mode == Conversation.MODE_MULTI && conversation.getMucOptions().pgpKeysInUse()) {
+					if (!conversation.getMucOptions().everybodyHasKeys()) {
+						Toast warning = Toast
+								.makeText(this,
+										R.string.missing_public_keys,
+										Toast.LENGTH_LONG);
+						warning.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
+						warning.show();
+					}
+					selectPresenceToAttachFile(attachmentChoice, encryption);
 				} else {
 					final ConversationFragment fragment = (ConversationFragment) getFragmentManager()
-						.findFragmentByTag("conversation");
+							.findFragmentByTag("conversation");
 					if (fragment != null) {
 						fragment.showNoPGPKeyDialog(false,
 								new OnClickListener() {
 
 									@Override
 									public void onClick(DialogInterface dialog,
-											int which) {
+														int which) {
 										conversation
-											.setNextEncryption(Message.ENCRYPTION_NONE);
+												.setNextEncryption(Message.ENCRYPTION_NONE);
 										xmppConnectionService.databaseBackend
-											.updateConversation(conversation);
-										selectPresenceToAttachFile(attachmentChoice,Message.ENCRYPTION_NONE);
+												.updateConversation(conversation);
+										selectPresenceToAttachFile(attachmentChoice, Message.ENCRYPTION_NONE);
 									}
 								});
 					}
@@ -541,7 +581,40 @@ public class ConversationActivity extends XmppActivity
 				showInstallPgpDialog();
 			}
 		} else {
-			selectPresenceToAttachFile(attachmentChoice, encryption);
+			if (encryption != Message.ENCRYPTION_AXOLOTL || !trustKeysIfNeeded(REQUEST_TRUST_KEYS_MENU, attachmentChoice)) {
+				selectPresenceToAttachFile(attachmentChoice, encryption);
+			}
+		}
+	}
+
+	@Override
+	public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
+		if (grantResults.length > 0)
+			if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+				if (requestCode == REQUEST_START_DOWNLOAD) {
+					if (this.mPendingDownloadableMessage != null) {
+						startDownloadable(this.mPendingDownloadableMessage);
+					}
+				} else {
+					attachFile(requestCode);
+				}
+			} else {
+				Toast.makeText(this, R.string.no_storage_permission, Toast.LENGTH_SHORT).show();
+			}
+	}
+
+	public void startDownloadable(Message message) {
+		if (!hasStoragePermission(ConversationActivity.REQUEST_START_DOWNLOAD)) {
+			this.mPendingDownloadableMessage = message;
+			return;
+		}
+		Transferable transferable = message.getTransferable();
+		if (transferable != null) {
+			if (!transferable.start()) {
+				Toast.makeText(this, R.string.not_connected_try_again, Toast.LENGTH_SHORT).show();
+			}
+		} else if (message.treatAsDownloadable() != Message.Decision.NEVER) {
+			xmppConnectionService.getHttpConnectionManager().createNewDownloadConnection(message, true);
 		}
 	}
 
@@ -616,6 +689,12 @@ public class ConversationActivity extends XmppActivity
 				this.mConversationFragment.reInit(getSelectedConversation());
 			} else {
 				setSelectedConversation(null);
+				if (mRedirected.compareAndSet(false, true)) {
+					Intent intent = new Intent(this, StartConversationActivity.class);
+					intent.putExtra("init", true);
+					startActivity(intent);
+					finish();
+				}
 			}
 		}
 	}
@@ -627,23 +706,23 @@ public class ConversationActivity extends XmppActivity
 		View dialogView = getLayoutInflater().inflate(
 				R.layout.dialog_clear_history, null);
 		final CheckBox endConversationCheckBox = (CheckBox) dialogView
-			.findViewById(R.id.end_conversation_checkbox);
+				.findViewById(R.id.end_conversation_checkbox);
 		builder.setView(dialogView);
 		builder.setNegativeButton(getString(R.string.cancel), null);
 		builder.setPositiveButton(getString(R.string.delete_messages),
-                new OnClickListener() {
+				new OnClickListener() {
 
-                    @Override
-                    public void onClick(DialogInterface dialog, int which) {
-                        ConversationActivity.this.xmppConnectionService.clearConversationHistory(conversation);
-                        if (endConversationCheckBox.isChecked()) {
-                            endConversation(conversation);
-                        } else {
-                            updateConversationList();
-                            ConversationActivity.this.mConversationFragment.updateMessages();
-                        }
-                    }
-                });
+					@Override
+					public void onClick(DialogInterface dialog, int which) {
+						ConversationActivity.this.xmppConnectionService.clearConversationHistory(conversation);
+						if (endConversationCheckBox.isChecked()) {
+							endConversation(conversation);
+						} else {
+							updateConversationList();
+							ConversationActivity.this.mConversationFragment.updateMessages();
+						}
+					}
+				});
 		builder.create().show();
 	}
 
@@ -657,7 +736,7 @@ public class ConversationActivity extends XmppActivity
 		if (new Intent(MediaStore.Audio.Media.RECORD_SOUND_ACTION).resolveActivity(getPackageManager()) == null) {
 			attachFilePopup.getMenu().findItem(R.id.attach_record_voice).setVisible(false);
 		}
-		if (new Intent("de.thedevstack.conversationsplus.location.request").resolveActivity(getPackageManager()) == null) {
+		if (new Intent("eu.siacs.conversations.location.request").resolveActivity(getPackageManager()) == null) {
 			attachFilePopup.getMenu().findItem(R.id.attach_location).setVisible(false);
 		}
 		attachFilePopup.setOnMenuItemClickListener(new OnMenuItemClickListener() {
@@ -703,7 +782,7 @@ public class ConversationActivity extends XmppActivity
 				Intent intent = new Intent(ConversationActivity.this, VerifyOTRActivity.class);
 				intent.setAction(VerifyOTRActivity.ACTION_VERIFY_CONTACT);
 				intent.putExtra("contact", conversation.getContact().getJid().toBareJid().toString());
-				intent.putExtra("account", conversation.getAccount().getJid().toBareJid().toString());
+				intent.putExtra(EXTRA_ACCOUNT, conversation.getAccount().getJid().toBareJid().toString());
 				switch (menuItem.getItemId()) {
 					case R.id.scan_fingerprint:
 						intent.putExtra("mode", VerifyOTRActivity.MODE_SCAN_FINGERPRINT);
@@ -729,7 +808,7 @@ public class ConversationActivity extends XmppActivity
 		}
 		PopupMenu popup = new PopupMenu(this, menuItemView);
 		final ConversationFragment fragment = (ConversationFragment) getFragmentManager()
-			.findFragmentByTag("conversation");
+				.findFragmentByTag("conversation");
 		if (fragment != null) {
 			popup.setOnMenuItemClickListener(new OnMenuItemClickListener() {
 
@@ -746,16 +825,22 @@ public class ConversationActivity extends XmppActivity
 							break;
 						case R.id.encryption_choice_pgp:
 							if (hasPgp()) {
-								if (conversation.getAccount().getKeys().has("pgp_signature")) {
+								if (conversation.getAccount().getPgpSignature() != null) {
 									conversation.setNextEncryption(Message.ENCRYPTION_PGP);
 									item.setChecked(true);
 								} else {
-									announcePgp(conversation.getAccount(),conversation);
+									announcePgp(conversation.getAccount(), conversation);
 								}
 							} else {
 								showInstallPgpDialog();
 							}
 							break;
+						case R.id.encryption_choice_axolotl:
+							Log.d(Config.LOGTAG, AxolotlServiceImpl.getLogprefix(conversation.getAccount())
+									+ "Enabled axolotl for Contact " + conversation.getContact().getJid());
+							conversation.setNextEncryption(Message.ENCRYPTION_AXOLOTL);
+							item.setChecked(true);
+							break;
 						default:
 							conversation.setNextEncryption(Message.ENCRYPTION_NONE);
 							break;
@@ -763,6 +848,7 @@ public class ConversationActivity extends XmppActivity
 					xmppConnectionService.databaseBackend.updateConversation(conversation);
 					fragment.updateChatMsgHint();
 					invalidateOptionsMenu();
+					refreshUi();
 					return true;
 				}
 			});
@@ -770,15 +856,18 @@ public class ConversationActivity extends XmppActivity
 			MenuItem otr = popup.getMenu().findItem(R.id.encryption_choice_otr);
 			MenuItem none = popup.getMenu().findItem(R.id.encryption_choice_none);
 			MenuItem pgp = popup.getMenu().findItem(R.id.encryption_choice_pgp);
-			boolean forceEncryption = ConversationsPlusPreferences.forceEncryption();
+			MenuItem axolotl = popup.getMenu().findItem(R.id.encryption_choice_axolotl);
+			pgp.setVisible(Config.supportOpenPgp());
+			none.setVisible(Config.supportUnencrypted() || conversation.getMode() == Conversation.MODE_MULTI);
+			otr.setVisible(Config.supportOtr());
+			axolotl.setVisible(Config.supportOmemo());
 			if (conversation.getMode() == Conversation.MODE_MULTI) {
-				otr.setEnabled(false);
-			} else {
-				if (forceEncryption) {
-					none.setVisible(false);
-				}
+				otr.setVisible(false);
+				axolotl.setVisible(false);
+			} else if (!conversation.getAccount().getAxolotlService().isContactAxolotlCapable(conversation.getContact())) {
+				axolotl.setEnabled(false);
 			}
-			switch (conversation.getNextEncryption(forceEncryption)) {
+			switch (conversation.getNextEncryption()) {
 				case Message.ENCRYPTION_NONE:
 					none.setChecked(true);
 					break;
@@ -788,6 +877,9 @@ public class ConversationActivity extends XmppActivity
 				case Message.ENCRYPTION_PGP:
 					pgp.setChecked(true);
 					break;
+				case Message.ENCRYPTION_AXOLOTL:
+					axolotl.setChecked(true);
+					break;
 				default:
 					none.setChecked(true);
 					break;
@@ -799,27 +891,26 @@ public class ConversationActivity extends XmppActivity
 	protected void muteConversationDialog(final Conversation conversation) {
 		AlertDialog.Builder builder = new AlertDialog.Builder(this);
 		builder.setTitle(R.string.disable_notifications);
-		final int[] durations = getResources().getIntArray(
-				R.array.mute_options_durations);
+		final int[] durations = getResources().getIntArray(R.array.mute_options_durations);
 		builder.setItems(R.array.mute_options_descriptions,
-                new OnClickListener() {
+				new OnClickListener() {
 
-                    @Override
-                    public void onClick(final DialogInterface dialog, final int which) {
-                        final long till;
-                        if (durations[which] == -1) {
-                            till = Long.MAX_VALUE;
-                        } else {
-                            till = System.currentTimeMillis() + (durations[which] * 1000);
-                        }
-                        conversation.setMutedTill(till);
-                        ConversationActivity.this.xmppConnectionService.databaseBackend
-                                .updateConversation(conversation);
-                        updateConversationList();
-                        ConversationActivity.this.mConversationFragment.updateMessages();
-                        invalidateOptionsMenu();
-                    }
-                });
+					@Override
+					public void onClick(final DialogInterface dialog, final int which) {
+						final long till;
+						if (durations[which] == -1) {
+							till = Long.MAX_VALUE;
+						} else {
+							till = System.currentTimeMillis() + (durations[which] * 1000);
+						}
+						conversation.setMutedTill(till);
+						ConversationActivity.this.xmppConnectionService.databaseBackend
+								.updateConversation(conversation);
+						updateConversationList();
+						ConversationActivity.this.mConversationFragment.updateMessages();
+						invalidateOptionsMenu();
+					}
+				});
 		builder.create().show();
 	}
 
@@ -841,10 +932,119 @@ public class ConversationActivity extends XmppActivity
 	}
 
 	@Override
+	public boolean onKeyUp(int key, KeyEvent event) {
+		int rotation = getWindowManager().getDefaultDisplay().getRotation();
+		final int upKey;
+		final int downKey;
+		switch (rotation) {
+			case Surface.ROTATION_90:
+				upKey = KeyEvent.KEYCODE_DPAD_LEFT;
+				downKey = KeyEvent.KEYCODE_DPAD_RIGHT;
+				break;
+			case Surface.ROTATION_180:
+				upKey = KeyEvent.KEYCODE_DPAD_DOWN;
+				downKey = KeyEvent.KEYCODE_DPAD_UP;
+				break;
+			case Surface.ROTATION_270:
+				upKey = KeyEvent.KEYCODE_DPAD_RIGHT;
+				downKey = KeyEvent.KEYCODE_DPAD_LEFT;
+				break;
+			default:
+				upKey = KeyEvent.KEYCODE_DPAD_UP;
+				downKey = KeyEvent.KEYCODE_DPAD_DOWN;
+		}
+		final boolean modifier = event.isCtrlPressed() || event.isAltPressed();
+		if (modifier && key == KeyEvent.KEYCODE_TAB && isConversationsOverviewHideable()) {
+			toggleConversationsOverview();
+			return true;
+		} else if (modifier && key == downKey) {
+			if (isConversationsOverviewHideable() && !isConversationsOverviewVisable()) {
+				showConversationsOverview();
+				;
+			}
+			return selectDownConversation();
+		} else if (modifier && key == upKey) {
+			if (isConversationsOverviewHideable() && !isConversationsOverviewVisable()) {
+				showConversationsOverview();
+			}
+			return selectUpConversation();
+		} else if (modifier && key == KeyEvent.KEYCODE_1) {
+			return openConversationByIndex(0);
+		} else if (modifier && key == KeyEvent.KEYCODE_2) {
+			return openConversationByIndex(1);
+		} else if (modifier && key == KeyEvent.KEYCODE_3) {
+			return openConversationByIndex(2);
+		} else if (modifier && key == KeyEvent.KEYCODE_4) {
+			return openConversationByIndex(3);
+		} else if (modifier && key == KeyEvent.KEYCODE_5) {
+			return openConversationByIndex(4);
+		} else if (modifier && key == KeyEvent.KEYCODE_6) {
+			return openConversationByIndex(5);
+		} else if (modifier && key == KeyEvent.KEYCODE_7) {
+			return openConversationByIndex(6);
+		} else if (modifier && key == KeyEvent.KEYCODE_8) {
+			return openConversationByIndex(7);
+		} else if (modifier && key == KeyEvent.KEYCODE_9) {
+			return openConversationByIndex(8);
+		} else if (modifier && key == KeyEvent.KEYCODE_0) {
+			return openConversationByIndex(9);
+		} else {
+			return super.onKeyUp(key, event);
+		}
+	}
+
+	private void toggleConversationsOverview() {
+		if (isConversationsOverviewVisable()) {
+			hideConversationsOverview();
+			if (mConversationFragment != null) {
+				mConversationFragment.setFocusOnInputField();
+			}
+		} else {
+			showConversationsOverview();
+		}
+	}
+
+	private boolean selectUpConversation() {
+		if (this.mSelectedConversation != null) {
+			int index = this.conversationList.indexOf(this.mSelectedConversation);
+			if (index > 0) {
+				return openConversationByIndex(index - 1);
+			}
+		}
+		return false;
+	}
+
+	private boolean selectDownConversation() {
+		if (this.mSelectedConversation != null) {
+			int index = this.conversationList.indexOf(this.mSelectedConversation);
+			if (index != -1 && index < this.conversationList.size() - 1) {
+				return openConversationByIndex(index + 1);
+			}
+		}
+		return false;
+	}
+
+	private boolean openConversationByIndex(int index) {
+		try {
+			this.conversationWasSelectedByKeyboard = true;
+			setSelectedConversation(this.conversationList.get(index));
+			this.mConversationFragment.reInit(getSelectedConversation());
+			if (index > listView.getLastVisiblePosition() - 1 || index < listView.getFirstVisiblePosition() + 1) {
+				this.listView.setSelection(index);
+			}
+			openConversation();
+			return true;
+		} catch (IndexOutOfBoundsException e) {
+			return false;
+		}
+	}
+
+	@Override
 	protected void onNewIntent(final Intent intent) {
 		if (xmppConnectionServiceBound) {
 			if (intent != null && VIEW_CONVERSATION.equals(intent.getType())) {
 				handleViewConversationIntent(intent);
+				setIntent(new Intent());
 			}
 		} else {
 			setIntent(intent);
@@ -854,7 +1054,7 @@ public class ConversationActivity extends XmppActivity
 	@Override
 	public void onStart() {
 		super.onStart();
-		this.mRedirected = false;
+		this.mRedirected.set(false);
 		if (this.xmppConnectionServiceBound) {
 			this.onBackendConnected();
 		}
@@ -896,17 +1096,26 @@ public class ConversationActivity extends XmppActivity
 	public void onSaveInstanceState(final Bundle savedInstanceState) {
 		Conversation conversation = getSelectedConversation();
 		if (conversation != null) {
-			savedInstanceState.putString(STATE_OPEN_CONVERSATION,
-					conversation.getUuid());
+			savedInstanceState.putString(STATE_OPEN_CONVERSATION, conversation.getUuid());
+		} else {
+			savedInstanceState.remove(STATE_OPEN_CONVERSATION);
 		}
-		savedInstanceState.putBoolean(STATE_PANEL_OPEN,
-                isConversationsOverviewVisable());
+		savedInstanceState.putBoolean(STATE_PANEL_OPEN, isConversationsOverviewVisable());
 		if (this.mPendingImageUris.size() >= 1) {
 			savedInstanceState.putString(STATE_PENDING_URI, this.mPendingImageUris.get(0).toString());
+		} else {
+			savedInstanceState.remove(STATE_PENDING_URI);
 		}
 		super.onSaveInstanceState(savedInstanceState);
 	}
 
+	private void clearPending() {
+		mPendingImageUris.clear();
+		mPendingFileUris.clear();
+		mPendingGeoUri = null;
+		mPostponedActivityResult = null;
+	}
+
 	@Override
 	void onBackendConnected() {
 		this.xmppConnectionService.getNotificationService().setIsInForeground(true);
@@ -918,20 +1127,23 @@ public class ConversationActivity extends XmppActivity
 		}
 
 		if (xmppConnectionService.getAccounts().size() == 0) {
-			if (!mRedirected) {
-				this.mRedirected = true;
-				startActivity(new Intent(this, EditAccountActivity.class));
+			if (mRedirected.compareAndSet(false, true)) {
+				if (Config.X509_VERIFICATION) {
+					startActivity(new Intent(this, ManageAccountActivity.class));
+				} else {
+					startActivity(new Intent(this, EditAccountActivity.class));
+				}
 				finish();
 			}
 		} else if (conversationList.size() <= 0) {
-			if (!mRedirected) {
-				this.mRedirected = true;
+			if (mRedirected.compareAndSet(false, true)) {
 				Intent intent = new Intent(this, StartConversationActivity.class);
-				intent.putExtra("init",true);
+				intent.putExtra("init", true);
 				startActivity(intent);
 				finish();
 			}
 		} else if (getIntent() != null && VIEW_CONVERSATION.equals(getIntent().getType())) {
+			clearPending();
 			handleViewConversationIntent(getIntent());
 		} else if (selectConversationByUuid(mOpenConverstaion)) {
 			if (mPanelOpen) {
@@ -939,32 +1151,45 @@ public class ConversationActivity extends XmppActivity
 			} else {
 				if (isConversationsOverviewHideable()) {
 					openConversation();
+					updateActionBarTitle(true);
 				}
 			}
 			this.mConversationFragment.reInit(getSelectedConversation());
 			mOpenConverstaion = null;
 		} else if (getSelectedConversation() == null) {
 			showConversationsOverview();
-			mPendingImageUris.clear();
-			mPendingFileUris.clear();
-			mPendingGeoUri = null;
+			clearPending();
 			setSelectedConversation(conversationList.get(0));
 			this.mConversationFragment.reInit(getSelectedConversation());
+		} else {
+			this.mConversationFragment.messagesView.invalidateViews();
+			this.mConversationFragment.setupIme();
 		}
 
-		for(Iterator<Uri> i = mPendingImageUris.iterator(); i.hasNext(); i.remove()) {
-			attachImageToConversation(getSelectedConversation(),i.next());
+		if (this.mPostponedActivityResult != null) {
+			this.onActivityResult(mPostponedActivityResult.first, RESULT_OK, mPostponedActivityResult.second);
 		}
 
-		for(Iterator<Uri> i = mPendingFileUris.iterator(); i.hasNext(); i.remove()) {
-			attachFileToConversation(getSelectedConversation(),i.next());
+		if (!forbidProcessingPendings) {
+			for (Iterator<Uri> i = mPendingImageUris.iterator(); i.hasNext(); i.remove()) {
+				Uri foo = i.next();
+				attachImageToConversation(getSelectedConversation(), foo);
+			}
+
+			for (Iterator<Uri> i = mPendingFileUris.iterator(); i.hasNext(); i.remove()) {
+				attachFileToConversation(getSelectedConversation(), i.next());
+			}
+
+			if (mPendingGeoUri != null) {
+				attachLocationToConversation(getSelectedConversation(), mPendingGeoUri);
+				mPendingGeoUri = null;
+			}
 		}
+		forbidProcessingPendings = false;
 
-		if (mPendingGeoUri != null) {
-			attachLocationToConversation(getSelectedConversation(), mPendingGeoUri);
-			mPendingGeoUri = null;
+		if (!ExceptionHelper.checkForCrash(this, this.xmppConnectionService)) {
+			openBatteryOptimizationDialogIfNeeded();
 		}
-		ExceptionHelper.checkForCrash(this, this.xmppConnectionService);
 		setIntent(new Intent());
 	}
 
@@ -973,10 +1198,21 @@ public class ConversationActivity extends XmppActivity
 		final String downloadUuid = intent.getStringExtra(MESSAGE);
 		final String text = intent.getStringExtra(TEXT);
 		final String nick = intent.getStringExtra(NICK);
+		final boolean pm = intent.getBooleanExtra(PRIVATE_MESSAGE, false);
 		if (selectConversationByUuid(uuid)) {
 			this.mConversationFragment.reInit(getSelectedConversation());
 			if (nick != null) {
-				this.mConversationFragment.highlightInConference(nick);
+				if (pm) {
+					Jid jid = getSelectedConversation().getJid();
+					try {
+						Jid next = Jid.fromParts(jid.getLocalpart(), jid.getDomainpart(), nick);
+						this.mConversationFragment.privateMessageWith(next);
+					} catch (final InvalidJidException ignored) {
+						//do nothing
+					}
+				} else {
+					this.mConversationFragment.highlightInConference(nick);
+				}
 			} else {
 				this.mConversationFragment.appendText(text);
 			}
@@ -988,7 +1224,7 @@ public class ConversationActivity extends XmppActivity
 			if (downloadUuid != null) {
 				final Message message = mSelectedConversation.findMessageWithFileAndUuid(downloadUuid);
 				if (message != null) {
-					mConversationFragment.messageListAdapter.startDownloadable(message);
+					startDownloadable(message);
 				}
 			}
 		}
@@ -1016,10 +1252,13 @@ public class ConversationActivity extends XmppActivity
 	@SuppressLint("NewApi")
 	private static List<Uri> extractUriFromIntent(final Intent intent) {
 		List<Uri> uris = new ArrayList<>();
+		if (intent == null) {
+			return uris;
+		}
 		Uri uri = intent.getData();
 		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2 && uri == null) {
 			ClipData clipData = intent.getClipData();
-			for(int i = 0; i < clipData.getItemCount(); ++i) {
+			for (int i = 0; i < clipData.getItemCount(); ++i) {
 				uris.add(clipData.getItemAt(i).getUri());
 			}
 		} else {
@@ -1029,26 +1268,46 @@ public class ConversationActivity extends XmppActivity
 	}
 
 	@Override
-	protected void onActivityResult(int requestCode, int resultCode,
-			final Intent data) {
+	protected void onActivityResult(int requestCode, int resultCode, final Intent data) {
 		super.onActivityResult(requestCode, resultCode, data);
 		if (resultCode == RESULT_OK) {
 			if (requestCode == REQUEST_DECRYPT_PGP) {
-				mConversationFragment.hideSnackbar();
-				mConversationFragment.updateMessages();
+				mConversationFragment.onActivityResult(requestCode, resultCode, data);
+			} else if (requestCode == REQUEST_CHOOSE_PGP_ID) {
+				// the user chose OpenPGP for encryption and selected his key in the PGP provider
+				if (xmppConnectionServiceBound) {
+					if (data.getExtras().containsKey(OpenPgpApi.EXTRA_SIGN_KEY_ID)) {
+						// associate selected PGP keyId with the account
+						mSelectedConversation.getAccount().setPgpSignId(data.getExtras().getLong(OpenPgpApi.EXTRA_SIGN_KEY_ID));
+						// we need to announce the key as described in XEP-027
+						announcePgp(mSelectedConversation.getAccount(), null);
+					} else {
+						choosePgpSignId(mSelectedConversation.getAccount());
+					}
+					this.mPostponedActivityResult = null;
+				} else {
+					this.mPostponedActivityResult = new Pair<>(requestCode, data);
+				}
+			} else if (requestCode == REQUEST_ANNOUNCE_PGP) {
+				if (xmppConnectionServiceBound) {
+					announcePgp(mSelectedConversation.getAccount(), mSelectedConversation);
+					this.mPostponedActivityResult = null;
+				} else {
+					this.mPostponedActivityResult = new Pair<>(requestCode, data);
+				}
 			} else if (requestCode == ATTACHMENT_CHOICE_CHOOSE_IMAGE) {
 				mPendingImageUris.clear();
 				mPendingImageUris.addAll(extractUriFromIntent(data));
 				if (xmppConnectionServiceBound) {
-					for(Iterator<Uri> i = mPendingImageUris.iterator(); i.hasNext(); i.remove()) {
-						attachImageToConversation(getSelectedConversation(),i.next());
+					for (Iterator<Uri> i = mPendingImageUris.iterator(); i.hasNext(); i.remove()) {
+						attachImageToConversation(getSelectedConversation(), i.next());
 					}
 				}
 			} else if (requestCode == ATTACHMENT_CHOICE_CHOOSE_FILE || requestCode == ATTACHMENT_CHOICE_RECORD_VOICE) {
 				mPendingFileUris.clear();
 				mPendingFileUris.addAll(extractUriFromIntent(data));
 				if (xmppConnectionServiceBound) {
-					for(Iterator<Uri> i = mPendingFileUris.iterator(); i.hasNext(); i.remove()) {
+					for (Iterator<Uri> i = mPendingFileUris.iterator(); i.hasNext(); i.remove()) {
 						attachFileToConversation(getSelectedConversation(), i.next());
 					}
 				}
@@ -1066,66 +1325,109 @@ public class ConversationActivity extends XmppActivity
 					mPendingImageUris.clear();
 				}
 			} else if (requestCode == ATTACHMENT_CHOICE_LOCATION) {
-				double latitude = data.getDoubleExtra("latitude",0);
-				double longitude = data.getDoubleExtra("longitude",0);
-				this.mPendingGeoUri = Uri.parse("geo:"+String.valueOf(latitude)+","+String.valueOf(longitude));
+				double latitude = data.getDoubleExtra("latitude", 0);
+				double longitude = data.getDoubleExtra("longitude", 0);
+				this.mPendingGeoUri = Uri.parse("geo:" + String.valueOf(latitude) + "," + String.valueOf(longitude));
 				if (xmppConnectionServiceBound) {
 					attachLocationToConversation(getSelectedConversation(), mPendingGeoUri);
 					this.mPendingGeoUri = null;
 				}
+			} else if (requestCode == REQUEST_TRUST_KEYS_TEXT || requestCode == REQUEST_TRUST_KEYS_MENU) {
+				this.forbidProcessingPendings = !xmppConnectionServiceBound;
+				if (xmppConnectionServiceBound) {
+					mConversationFragment.onActivityResult(requestCode, resultCode, data);
+					this.mPostponedActivityResult = null;
+				} else {
+					this.mPostponedActivityResult = new Pair<>(requestCode, data);
+				}
+
 			}
 		} else {
-			mPendingImageUris.clear();
-			mPendingFileUris.clear();
+            mPendingImageUris.clear();
+            mPendingFileUris.clear();
+            if (requestCode == ConversationActivity.REQUEST_DECRYPT_PGP) {
+                mConversationFragment.onActivityResult(requestCode, resultCode, data);
+            }
+            if (requestCode == REQUEST_BATTERY_OP) {
+                setNeverAskForBatteryOptimizationsAgain();
+            }
 		}
 	}
 
+    private void setNeverAskForBatteryOptimizationsAgain() {
+        getPreferences().edit().putBoolean("show_battery_optimization", false).commit();
+    }
+
+    private void openBatteryOptimizationDialogIfNeeded() {
+        if (showBatteryOptimizationWarning() && getPreferences().getBoolean("show_battery_optimization", true)) {
+            AlertDialog.Builder builder = new AlertDialog.Builder(this);
+            builder.setTitle(R.string.battery_optimizations_enabled);
+            builder.setMessage(R.string.battery_optimizations_enabled_dialog);
+            builder.setPositiveButton(R.string.next, new OnClickListener() {
+                @Override
+                public void onClick(DialogInterface dialog, int which) {
+                    Intent intent = new Intent(Settings.ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS);
+                    Uri uri = Uri.parse("package:" + getPackageName());
+                    intent.setData(uri);
+                    startActivityForResult(intent, REQUEST_BATTERY_OP);
+                }
+            });
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
+                builder.setOnDismissListener(new DialogInterface.OnDismissListener() {
+                    @Override
+                    public void onDismiss(DialogInterface dialog) {
+                        setNeverAskForBatteryOptimizationsAgain();
+                    }
+                });
+            }
+            builder.create().show();
+        }
+    }
+
 	private void attachLocationToConversation(Conversation conversation, Uri uri) {
-		if (conversation == null) {
-			return;
-		}
 		xmppConnectionService.attachLocationToConversation(conversation, uri, new UiCallback<Message>() {
 
-            @Override
-            public void success(Message message) {
-                xmppConnectionService.sendMessage(message);
-            }
+			@Override
+			public void success(Message message) {
+				xmppConnectionService.sendMessage(message);
+			}
 
-            @Override
-            public void error(int errorCode, Message object) {
+			@Override
+			public void error(int errorCode, Message object) {
 
-            }
+			}
 
-            @Override
-            public void userInputRequried(PendingIntent pi, Message object) {
+			@Override
+			public void userInputRequried(PendingIntent pi, Message object) {
 
-            }
-        });
+			}
+		});
 	}
 
 	private void attachFileToConversation(Conversation conversation, Uri uri) {
 		if (conversation == null) {
 			return;
 		}
-		prepareFileToast = Toast.makeText(getApplicationContext(),getText(R.string.preparing_file), Toast.LENGTH_LONG);
+		final Toast prepareFileToast = Toast.makeText(getApplicationContext(),getText(R.string.preparing_file), Toast.LENGTH_LONG);
 		prepareFileToast.show();
 		xmppConnectionService.attachFileToConversation(conversation, uri, new UiCallback<Message>() {
-            @Override
-            public void success(Message message) {
-                hidePrepareFileToast();
-                xmppConnectionService.sendMessage(message);
-            }
+			@Override
+			public void success(Message message) {
+				hidePrepareFileToast(prepareFileToast);
+				xmppConnectionService.sendMessage(message);
+			}
 
-            @Override
-            public void error(int errorCode, Message message) {
-                displayErrorDialog(errorCode);
-            }
+			@Override
+			public void error(int errorCode, Message message) {
+				hidePrepareFileToast(prepareFileToast);
+				displayErrorDialog(errorCode);
+			}
 
-            @Override
-            public void userInputRequried(PendingIntent pi, Message message) {
+			@Override
+			public void userInputRequried(PendingIntent pi, Message message) {
 
-            }
-        });
+			}
+		});
 	}
 
 	private void attachImageToConversation(Conversation conversation, Uri uri) {
@@ -1137,7 +1439,7 @@ public class ConversationActivity extends XmppActivity
         userDecisionDialog.decide(ConversationsPlusPreferences.resizePicture());
 	}
 
-	private void hidePrepareFileToast() {
+	private void hidePrepareFileToast(final Toast prepareFileToast) {
 		if (prepareFileToast != null) {
 			runOnUiThread(new Runnable() {
 
@@ -1176,7 +1478,7 @@ public class ConversationActivity extends XmppActivity
 
 					@Override
 					public void userInputRequried(PendingIntent pi,
-							Message message) {
+												  Message message) {
 						ConversationActivity.this.runIntent(pi,
 								ConversationActivity.REQUEST_SEND_MESSAGE);
 					}
@@ -1194,26 +1496,38 @@ public class ConversationActivity extends XmppActivity
 				});
 	}
 
+	protected boolean trustKeysIfNeeded(int requestCode) {
+		return trustKeysIfNeeded(requestCode, ATTACHMENT_CHOICE_INVALID);
+	}
+
+	protected boolean trustKeysIfNeeded(int requestCode, int attachmentChoice) {
+		AxolotlService axolotlService = mSelectedConversation.getAccount().getAxolotlService();
+		Contact contact = mSelectedConversation.getContact();
+		boolean hasUndecidedOwn = !axolotlService.getKeysWithTrust(XmppAxolotlSession.Trust.UNDECIDED).isEmpty();
+		boolean hasUndecidedContact = !axolotlService.getKeysWithTrust(XmppAxolotlSession.Trust.UNDECIDED,contact).isEmpty();
+		boolean hasPendingKeys = !axolotlService.findDevicesWithoutSession(mSelectedConversation).isEmpty();
+		boolean hasNoTrustedKeys = axolotlService.getNumTrustedKeys(mSelectedConversation.getContact()) == 0;
+		if(hasUndecidedOwn || hasUndecidedContact || hasPendingKeys || hasNoTrustedKeys) {
+			axolotlService.createSessionsIfNeeded(mSelectedConversation);
+			Intent intent = new Intent(getApplicationContext(), TrustKeysActivity.class);
+			intent.putExtra("contact", mSelectedConversation.getContact().getJid().toBareJid().toString());
+			intent.putExtra(EXTRA_ACCOUNT, mSelectedConversation.getAccount().getJid().toBareJid().toString());
+			intent.putExtra("choice", attachmentChoice);
+			intent.putExtra("has_no_trusted", hasNoTrustedKeys);
+			startActivityForResult(intent, requestCode);
+			return true;
+		} else {
+			return false;
+		}
+	}
+
 	@Override
 	protected void refreshUiReal() {
 		updateConversationList();
-		if (xmppConnectionService != null && xmppConnectionService.getAccounts().size() == 0) {
-			if (!mRedirected) {
-				this.mRedirected = true;
-				startActivity(new Intent(this, EditAccountActivity.class));
-				finish();
-			}
-		} else if (conversationList.size() == 0) {
-			if (!mRedirected) {
-				this.mRedirected = true;
-				Intent intent = new Intent(this, StartConversationActivity.class);
-				intent.putExtra("init",true);
-				startActivity(intent);
-				finish();
-			}
-		} else {
+		if (conversationList.size() > 0) {
 			ConversationActivity.this.mConversationFragment.updateMessages();
 			updateActionBarTitle();
+			invalidateOptionsMenu();
 		}
 	}
 
@@ -1235,12 +1549,6 @@ public class ConversationActivity extends XmppActivity
 	@Override
 	public void OnUpdateBlocklist(Status status) {
 		this.refreshUi();
-		runOnUiThread(new Runnable() {
-			@Override
-			public void run() {
-				invalidateOptionsMenu();
-			}
-		});
 	}
 
 	public void unblockConversation(final Blockable conversation) {
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/ConversationFragment.java b/src/main/java/de/thedevstack/conversationsplus/ui/ConversationFragment.java
index 3ee79412..2828e27e 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/ConversationFragment.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/ConversationFragment.java
@@ -1,5 +1,6 @@
 package de.thedevstack.conversationsplus.ui;
 
+import android.app.Activity;
 import android.app.AlertDialog;
 import android.app.Fragment;
 import android.app.PendingIntent;
@@ -7,9 +8,9 @@ import android.content.ActivityNotFoundException;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
-import android.content.IntentSender;
 import android.content.IntentSender.SendIntentException;
 import android.os.Bundle;
+import android.support.annotation.Nullable;
 import android.text.InputType;
 import android.view.ContextMenu;
 import android.view.ContextMenu.ContextMenuInfo;
@@ -38,32 +39,31 @@ import com.orangegangsters.github.swipyrefreshlayout.library.SwipyRefreshLayout;
 import net.java.otr4j.session.SessionStatus;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
-import java.util.NoSuchElementException;
-import java.util.concurrent.ConcurrentLinkedQueue;
 
 import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
-import de.thedevstack.conversationsplus.persistance.FileBackend;
 import de.thedevstack.conversationsplus.ui.dialogs.MessageDetailsDialog;
-import de.thedevstack.conversationsplus.ui.listeners.ConversationSwipeRefreshListener;
 import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.R;
-import de.thedevstack.conversationsplus.crypto.PgpEngine;
+import de.thedevstack.conversationsplus.crypto.axolotl.AxolotlService;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Contact;
 import de.thedevstack.conversationsplus.entities.Conversation;
-import de.thedevstack.conversationsplus.entities.Transferable;
 import de.thedevstack.conversationsplus.entities.DownloadableFile;
-import de.thedevstack.conversationsplus.entities.TransferablePlaceholder;
 import de.thedevstack.conversationsplus.entities.Message;
 import de.thedevstack.conversationsplus.entities.MucOptions;
-import de.thedevstack.conversationsplus.entities.Presences;
+import de.thedevstack.conversationsplus.entities.Presence;
+import de.thedevstack.conversationsplus.entities.Transferable;
+import de.thedevstack.conversationsplus.entities.TransferablePlaceholder;
+import de.thedevstack.conversationsplus.persistance.FileBackend;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
 import de.thedevstack.conversationsplus.ui.XmppActivity.OnPresenceSelected;
 import de.thedevstack.conversationsplus.ui.XmppActivity.OnValueEdited;
 import de.thedevstack.conversationsplus.ui.adapter.MessageAdapter;
 import de.thedevstack.conversationsplus.ui.adapter.MessageAdapter.OnContactPictureClicked;
 import de.thedevstack.conversationsplus.ui.adapter.MessageAdapter.OnContactPictureLongClicked;
+import de.thedevstack.conversationsplus.ui.listeners.ConversationSwipeRefreshListener;
 import de.thedevstack.conversationsplus.utils.GeoHelper;
 import de.thedevstack.conversationsplus.utils.UIHelper;
 import de.thedevstack.conversationsplus.xmpp.chatstate.ChatState;
@@ -110,7 +110,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 	};
 	protected ListView messagesView;
     protected SwipyRefreshLayout swipeLayout;
-    final protected List<Message> messageList = new ArrayList<>();
+	final protected List<Message> messageList = new ArrayList<>();
 	protected MessageAdapter messageListAdapter;
 	private EditMessage mEditMessage;
 	private ImageButton mSendButton;
@@ -120,21 +120,49 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 	private RelativeLayout snackbar;
 	private TextView snackbarMessage;
 	private TextView snackbarAction;
-	private IntentSender askForPassphraseIntent = null;
+	private boolean messagesLoaded = true;
+	private Toast messageLoaderToast;
+	private final int KEYCHAIN_UNLOCK_NOT_REQUIRED = 0;
+	private final int KEYCHAIN_UNLOCK_REQUIRED = 1;
+	private final int KEYCHAIN_UNLOCK_PENDING = 2;
+	private int keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
 	protected OnClickListener clickToDecryptListener = new OnClickListener() {
 
 		@Override
 		public void onClick(View v) {
-			if (activity.hasPgp() && askForPassphraseIntent != null) {
-				try {
-					getActivity().startIntentSenderForResult(
-							askForPassphraseIntent,
-							ConversationActivity.REQUEST_DECRYPT_PGP, null, 0,
-							0, 0);
-					askForPassphraseIntent = null;
-				} catch (SendIntentException e) {
-					//
+			if (keychainUnlock == KEYCHAIN_UNLOCK_REQUIRED
+					&& activity.hasPgp() && !conversation.getAccount().getPgpDecryptionService().isRunning()) {
+				keychainUnlock = KEYCHAIN_UNLOCK_PENDING;
+				updateSnackBar(conversation);
+				Message message = getLastPgpDecryptableMessage();
+				if (message != null) {
+					activity.xmppConnectionService.getPgpEngine().decrypt(message, new UiCallback<Message>() {
+						@Override
+						public void success(Message object) {
+							conversation.getAccount().getPgpDecryptionService().onKeychainUnlocked();
+							keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
+						}
+
+						@Override
+						public void error(int errorCode, Message object) {
+							keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
+						}
+
+						@Override
+						public void userInputRequried(PendingIntent pi, Message object) {
+							try {
+								activity.startIntentSenderForResult(pi.getIntentSender(),
+										ConversationActivity.REQUEST_DECRYPT_PGP, null, 0, 0, 0);
+							} catch (SendIntentException e) {
+								keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
+								updatePgpMessages();
+							}
+						}
+					});
 				}
+			} else {
+				keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
+				updatePgpMessages();
 			}
 		}
 	};
@@ -145,8 +173,6 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 			activity.verifyOtrSessionDialog(conversation, v);
 		}
 	};
-	private ConcurrentLinkedQueue<Message> mEncryptedMessages = new ConcurrentLinkedQueue<>();
-	private boolean mDecryptJobRunning = false;
 	private OnEditorActionListener mEditorActionListener = new OnEditorActionListener() {
 
 		@Override
@@ -154,7 +180,9 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 			if (actionId == EditorInfo.IME_ACTION_SEND) {
 				InputMethodManager imm = (InputMethodManager) v.getContext()
 						.getSystemService(Context.INPUT_METHOD_SERVICE);
-				imm.hideSoftInputFromWindow(v.getWindowToken(), 0);
+				if (imm.isFullscreenMode()) {
+					imm.hideSoftInputFromWindow(v.getWindowToken(), 0);
+				}
 				sendMessage();
 				return true;
 			} else {
@@ -210,43 +238,64 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 	private ConversationActivity activity;
 	private Message selectedMessage;
 
+	public void setMessagesLoaded() {
+		this.messagesLoaded = true;
+	}
+
 	private void sendMessage() {
 		final String body = mEditMessage.getText().toString();
 		if (body.length() == 0 || this.conversation == null) {
 			return;
 		}
-		boolean forceEncryption = ConversationsPlusPreferences.forceEncryption();
-		Message message = new Message(conversation, body, conversation.getNextEncryption(forceEncryption));
+		Message message = new Message(conversation, body, conversation.getNextEncryption());
 		if (conversation.getMode() == Conversation.MODE_MULTI) {
 			if (conversation.getNextCounterpart() != null) {
 				message.setCounterpart(conversation.getNextCounterpart());
 				message.setType(Message.TYPE_PRIVATE);
 			}
 		}
-		if (conversation.getNextEncryption(forceEncryption) == Message.ENCRYPTION_OTR) {
-            sendOtrMessage(message);
-		} else if (conversation.getNextEncryption(forceEncryption) == Message.ENCRYPTION_PGP) {
-			sendPgpMessage(message);
-		} else {
-			sendPlainTextMessage(message);
+		switch (conversation.getNextEncryption()) {
+			case Message.ENCRYPTION_OTR:
+				sendOtrMessage(message);
+				break;
+			case Message.ENCRYPTION_PGP:
+				sendPgpMessage(message);
+				break;
+			case Message.ENCRYPTION_AXOLOTL:
+				if(!activity.trustKeysIfNeeded(ConversationActivity.REQUEST_TRUST_KEYS_TEXT)) {
+					sendAxolotlMessage(message);
+				}
+				break;
+			default:
+				sendPlainTextMessage(message);
 		}
 	}
 
 	public void updateChatMsgHint() {
-		if (conversation.getMode() == Conversation.MODE_MULTI
-				&& conversation.getNextCounterpart() != null) {
+		final boolean multi = conversation.getMode() == Conversation.MODE_MULTI;
+		if (multi && conversation.getNextCounterpart() != null) {
 			this.mEditMessage.setHint(getString(
-                    R.string.send_private_message_to,
-                    conversation.getNextCounterpart().getResourcepart()));
+					R.string.send_private_message_to,
+					conversation.getNextCounterpart().getResourcepart()));
+		} else if (multi && !conversation.getMucOptions().participating()) {
+			this.mEditMessage.setHint(R.string.you_are_not_participating);
 		} else {
-			switch (conversation.getNextEncryption(ConversationsPlusPreferences.forceEncryption())) {
+			switch (conversation.getNextEncryption()) {
 				case Message.ENCRYPTION_NONE:
 					mEditMessage
-							.setHint(getString(R.string.send_plain_text_message));
+							.setHint(getString(R.string.send_unencrypted_message));
 					break;
 				case Message.ENCRYPTION_OTR:
 					mEditMessage.setHint(getString(R.string.send_otr_message));
 					break;
+				case Message.ENCRYPTION_AXOLOTL:
+					AxolotlService axolotlService = conversation.getAccount().getAxolotlService();
+					if (axolotlService != null && axolotlService.trustedSessionVerified(conversation)) {
+						mEditMessage.setHint(getString(R.string.send_omemo_x509_message));
+					} else {
+						mEditMessage.setHint(getString(R.string.send_omemo_message));
+					}
+					break;
 				case Message.ENCRYPTION_PGP:
 					mEditMessage.setHint(getString(R.string.send_pgp_message));
 					break;
@@ -257,21 +306,26 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		}
 	}
 
-	private void setupIme() {
-		if (ConversationsPlusPreferences.displayEnterKey()) {
+	public void setupIme() {
+		if (activity == null) {
+			return;
+		} else if (activity.usingEnterKey() && ConversationsPlusPreferences.enterIsSend()) {
+			mEditMessage.setInputType(mEditMessage.getInputType() & (~InputType.TYPE_TEXT_FLAG_MULTI_LINE));
+			mEditMessage.setInputType(mEditMessage.getInputType() & (~InputType.TYPE_TEXT_VARIATION_SHORT_MESSAGE));
+		} else if (activity.usingEnterKey()) {
+			mEditMessage.setInputType(mEditMessage.getInputType() | InputType.TYPE_TEXT_FLAG_MULTI_LINE);
 			mEditMessage.setInputType(mEditMessage.getInputType() & (~InputType.TYPE_TEXT_VARIATION_SHORT_MESSAGE));
 		} else {
+			mEditMessage.setInputType(mEditMessage.getInputType() | InputType.TYPE_TEXT_FLAG_MULTI_LINE);
 			mEditMessage.setInputType(mEditMessage.getInputType() | InputType.TYPE_TEXT_VARIATION_SHORT_MESSAGE);
 		}
 	}
 
 	@Override
-	public View onCreateView(final LayoutInflater inflater,
-							 ViewGroup container, Bundle savedInstanceState) {
+	public View onCreateView(final LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
 		final View view = inflater.inflate(R.layout.fragment_conversation, container, false);
 		view.setOnClickListener(null);
 		mEditMessage = (EditMessage) view.findViewById(R.id.textinput);
-		setupIme();
 		mEditMessage.setOnClickListener(new OnClickListener() {
 
 			@Override
@@ -401,19 +455,20 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 				if (message.getStatus() <= Message.STATUS_RECEIVED) {
 					if (message.getConversation().getMode() == Conversation.MODE_MULTI) {
 						if (message.getCounterpart() != null) {
-							if (!message.getCounterpart().isBareJid()) {
-								highlightInConference(message.getCounterpart().getResourcepart());
-							} else {
-								highlightInConference(message.getCounterpart().toString());
+							String user = message.getCounterpart().isBareJid() ? message.getCounterpart().toString() : message.getCounterpart().getResourcepart();
+							if (!message.getConversation().getMucOptions().isUserInRoom(user)) {
+								Toast.makeText(activity,activity.getString(R.string.user_has_left_conference,user),Toast.LENGTH_SHORT).show();
 							}
+							highlightInConference(user);
 						}
 					} else {
-						activity.switchToContactDetails(message.getContact());
+						activity.switchToContactDetails(message.getContact(), message.getAxolotlFingerprint());
 					}
 				} else {
 					Account account = message.getConversation().getAccount();
 					Intent intent = new Intent(activity, EditAccountActivity.class);
 					intent.putExtra("jid", account.getJid().toBareJid().toString());
+					intent.putExtra("fingerprint", message.getAxolotlFingerprint());
 					startActivity(intent);
 				}
 			}
@@ -426,7 +481,14 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 						if (message.getStatus() <= Message.STATUS_RECEIVED) {
 							if (message.getConversation().getMode() == Conversation.MODE_MULTI) {
 								if (message.getCounterpart() != null) {
-									privateMessageWith(message.getCounterpart());
+									String user = message.getCounterpart().getResourcepart();
+									if (user != null) {
+										if (message.getConversation().getMucOptions().isUserInRoom(user)) {
+											privateMessageWith(message.getCounterpart());
+										} else {
+											Toast.makeText(activity, activity.getString(R.string.user_has_left_conference, user), Toast.LENGTH_SHORT).show();
+										}
+									}
 								}
 							}
 						} else {
@@ -448,8 +510,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 	}
 
 	@Override
-	public void onCreateContextMenu(ContextMenu menu, View v,
-									ContextMenuInfo menuInfo) {
+	public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
 		synchronized (this.messageList) {
 			super.onCreateContextMenu(menu, v, menuInfo);
 			AdapterView.AdapterContextMenuInfo acmi = (AdapterContextMenuInfo) menuInfo;
@@ -464,6 +525,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 			activity.getMenuInflater().inflate(R.menu.message_context, menu);
 			menu.setHeaderTitle(R.string.message_options);
 			MenuItem copyText = menu.findItem(R.id.copy_text);
+			MenuItem retryDecryption = menu.findItem(R.id.retry_decryption);
 			MenuItem shareWith = menu.findItem(R.id.share_with);
 			MenuItem sendAgain = menu.findItem(R.id.send_again);
 			MenuItem copyUrl = menu.findItem(R.id.copy_url);
@@ -475,6 +537,11 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 					&& m.treatAsDownloadable() != Message.Decision.MUST) {
 				copyText.setVisible(true);
 			}
+
+			if (m.getEncryption() == Message.ENCRYPTION_DECRYPTION_FAILED) {
+				retryDecryption.setVisible(true);
+			}
+
 			if ((m.getType() != Message.TYPE_TEXT
 					&& m.getType() != Message.TYPE_PRIVATE
 					&& m.getTransferable() == null)
@@ -489,7 +556,8 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 					|| m.treatAsDownloadable() == Message.Decision.MUST) {
 				copyUrl.setVisible(true);
 			}
-			if (m.getType() == Message.TYPE_TEXT && m.getTransferable() == null && m.treatAsDownloadable() != Message.Decision.NEVER) {
+			if ((m.getType() == Message.TYPE_TEXT && m.getTransferable() == null && m.treatAsDownloadable() != Message.Decision.NEVER)
+					|| (m.isFileOrImage() && m.getTransferable() instanceof TransferablePlaceholder && m.hasFileOnRemoteHost())){
 				downloadFile.setVisible(true);
 				downloadFile.setTitle(activity.getString(R.string.download_x_file,UIHelper.getFileDescriptionString(activity, m)));
 			}
@@ -504,9 +572,9 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 	@Override
 	public boolean onContextItemSelected(MenuItem item) {
 		switch (item.getItemId()) {
-			case R.id.msg_ctx_mnu_details:
+            case R.id.msg_ctx_mnu_details:
                 new MessageDetailsDialog(getActivity(), selectedMessage).show();
-				return true;
+                return true;
 			case R.id.share_with:
 				shareWith(selectedMessage);
 				return true;
@@ -525,6 +593,9 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 			case R.id.cancel_transmission:
 				cancelTransmission(selectedMessage);
 				return true;
+			case R.id.retry_decryption:
+				retryDecryption(selectedMessage);
+				return true;
 			default:
 				return super.onContextItemSelected(item);
 		}
@@ -537,11 +608,12 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 			shareIntent.putExtra(Intent.EXTRA_TEXT, message.getBody());
 			shareIntent.setType("text/plain");
 		} else {
-			shareIntent.putExtra(Intent.EXTRA_STREAM, FileBackend.getJingleFileUri(message));
+			shareIntent.putExtra(Intent.EXTRA_STREAM,
+					FileBackend.getJingleFileUri(message));
 			shareIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
 			String mime = message.getMimeType();
 			if (mime == null) {
-				mime = "image/webp";
+				mime = "*/*";
 			}
 			shareIntent.setType(mime);
 		}
@@ -594,7 +666,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 
 	private void downloadFile(Message message) {
 		activity.xmppConnectionService.getHttpConnectionManager()
-				.createNewDownloadConnection(message);
+				.createNewDownloadConnection(message,true);
 	}
 
 	private void cancelTransmission(Message message) {
@@ -606,6 +678,12 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		}
 	}
 
+	private void retryDecryption(Message message) {
+		message.setEncryption(Message.ENCRYPTION_PGP);
+		activity.xmppConnectionService.updateConversationUi();
+		conversation.getAccount().getPgpDecryptionService().add(message);
+	}
+
 	protected void privateMessageWith(final Jid counterpart) {
 		this.mEditMessage.setText("");
 		this.conversation.setNextCounterpart(counterpart);
@@ -629,7 +707,6 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 
 	@Override
 	public void onStop() {
-		mDecryptJobRunning = false;
 		super.onStop();
 		if (this.conversation != null) {
 			final String msg = mEditMessage.getText().toString();
@@ -650,9 +727,8 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		if (conversation == null) {
 			return;
 		}
-
 		this.activity = (ConversationActivity) getActivity();
-
+		setupIme();
 		if (this.conversation != null) {
 			final String msg = mEditMessage.getText().toString();
 			this.conversation.setNextMessage(msg);
@@ -662,19 +738,18 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 			this.conversation.trim();
 		}
 
-		this.askForPassphraseIntent = null;
+		this.keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
 		this.conversation = conversation;
-		this.mDecryptJobRunning = false;
-		this.mEncryptedMessages.clear();
-		if (this.conversation.getMode() == Conversation.MODE_MULTI) {
-			this.conversation.setNextCounterpart(null);
-		}
+		boolean canWrite = this.conversation.getMode() == Conversation.MODE_SINGLE || this.conversation.getMucOptions().participating();
+		this.mEditMessage.setEnabled(canWrite);
+		this.mSendButton.setEnabled(canWrite);
 		this.mEditMessage.setKeyboardListener(null);
 		this.mEditMessage.setText("");
 		this.mEditMessage.append(this.conversation.getNextMessage());
 		this.mEditMessage.setKeyboardListener(this);
 		this.messagesView.setAdapter(messageListAdapter);
 		updateMessages();
+		this.messagesLoaded = true;
 		int size = this.messageList.size();
 		if (size > 0) {
 			messagesView.setSelection(size - 1);
@@ -711,21 +786,13 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		}
 	};
 
-	private OnClickListener mUnmuteClickListener = new OnClickListener() {
-
-		@Override
-		public void onClick(final View v) {
-			activity.unmuteConversation(conversation);
-		}
-	};
-
 	private OnClickListener mAnswerSmpClickListener = new OnClickListener() {
 		@Override
 		public void onClick(View view) {
 			Intent intent = new Intent(activity, VerifyOTRActivity.class);
 			intent.setAction(VerifyOTRActivity.ACTION_VERIFY_CONTACT);
 			intent.putExtra("contact", conversation.getContact().getJid().toBareJid().toString());
-			intent.putExtra("account", conversation.getAccount().getJid().toBareJid().toString());
+			intent.putExtra(VerifyOTRActivity.EXTRA_ACCOUNT, conversation.getAccount().getJid().toBareJid().toString());
 			intent.putExtra("mode", VerifyOTRActivity.MODE_ANSWER_QUESTION);
 			startActivity(intent);
 		}
@@ -743,28 +810,34 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 				&& !conversation.getMucOptions().online()
 				&& account.getStatus() == Account.State.ONLINE) {
 			switch (conversation.getMucOptions().getError()) {
-				case MucOptions.ERROR_NICK_IN_USE:
+				case NICK_IN_USE:
 					showSnackbar(R.string.nick_in_use, R.string.edit, clickToMuc);
 					break;
-				case MucOptions.ERROR_UNKNOWN:
-					showSnackbar(R.string.conference_not_found, R.string.leave, leaveMuc);
+				case NO_RESPONSE:
+					showSnackbar(R.string.joining_conference, 0, null);
 					break;
-				case MucOptions.ERROR_PASSWORD_REQUIRED:
+				case PASSWORD_REQUIRED:
 					showSnackbar(R.string.conference_requires_password, R.string.enter_password, enterPassword);
 					break;
-				case MucOptions.ERROR_BANNED:
+				case BANNED:
 					showSnackbar(R.string.conference_banned, R.string.leave, leaveMuc);
 					break;
-				case MucOptions.ERROR_MEMBERS_ONLY:
+				case MEMBERS_ONLY:
 					showSnackbar(R.string.conference_members_only, R.string.leave, leaveMuc);
 					break;
-				case MucOptions.KICKED_FROM_ROOM:
+				case KICKED:
 					showSnackbar(R.string.conference_kicked, R.string.join, joinMuc);
 					break;
+				case UNKNOWN:
+					showSnackbar(R.string.conference_unknown_error, R.string.join, joinMuc);
+					break;
+				case SHUTDOWN:
+					showSnackbar(R.string.conference_shutdown, R.string.join, joinMuc);
+					break;
 				default:
 					break;
 			}
-		} else if (askForPassphraseIntent != null) {
+		} else if (keychainUnlock == KEYCHAIN_UNLOCK_REQUIRED) {
 			showSnackbar(R.string.openpgp_messages_found, R.string.decrypt, clickToDecryptListener);
 		} else if (mode == Conversation.MODE_SINGLE
 				&& conversation.smpRequested()) {
@@ -774,8 +847,6 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 				&& (conversation.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED)
 				&& (!conversation.isOtrFingerprintVerified())) {
 			showSnackbar(R.string.unknown_otr_fingerprint, R.string.verify, clickToVerify);
-		} else if (conversation.isMuted()) {
-			showSnackbar(R.string.notifications_disabled, R.string.enable, this.mUnmuteClickListener);
 		} else {
 			hideSnackbar();
 		}
@@ -788,19 +859,9 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 			}
 			final ConversationActivity activity = (ConversationActivity) getActivity();
 			if (this.conversation != null) {
-				updateSnackBar(this.conversation);
 				conversation.populateWithMessages(ConversationFragment.this.messageList);
-				for (final Message message : this.messageList) {
-					if (message.getEncryption() == Message.ENCRYPTION_PGP
-							&& (message.getStatus() == Message.STATUS_RECEIVED || message
-							.getStatus() >= Message.STATUS_SEND)
-							&& message.getTransferable() == null) {
-						if (!mEncryptedMessages.contains(message)) {
-							mEncryptedMessages.add(message);
-						}
-					}
-				}
-				decryptNext();
+				updatePgpMessages();
+				updateSnackBar(conversation);
 				updateStatusMessages();
 				this.messageListAdapter.notifyDataSetChanged();
 				updateChatMsgHint();
@@ -812,46 +873,27 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		}
 	}
 
-	private void decryptNext() {
-		Message next = this.mEncryptedMessages.peek();
-		PgpEngine engine = activity.xmppConnectionService.getPgpEngine();
-
-		if (next != null && engine != null && !mDecryptJobRunning) {
-			mDecryptJobRunning = true;
-			engine.decrypt(next, new UiCallback<Message>() {
-
-				@Override
-				public void userInputRequried(PendingIntent pi, Message message) {
-					mDecryptJobRunning = false;
-					askForPassphraseIntent = pi.getIntentSender();
-					updateSnackBar(conversation);
-				}
-
-				@Override
-				public void success(Message message) {
-					mDecryptJobRunning = false;
-					try {
-						mEncryptedMessages.remove();
-					} catch (final NoSuchElementException ignored) {
-
-					}
-					askForPassphraseIntent = null;
-					activity.xmppConnectionService.updateMessage(message);
-				}
-
-				@Override
-				public void error(int error, Message message) {
-					message.setEncryption(Message.ENCRYPTION_DECRYPTION_FAILED);
-					mDecryptJobRunning = false;
-					try {
-						mEncryptedMessages.remove();
-					} catch (final NoSuchElementException ignored) {
+	public void updatePgpMessages() {
+		if (keychainUnlock != KEYCHAIN_UNLOCK_PENDING) {
+			if (getLastPgpDecryptableMessage() != null
+					&& !conversation.getAccount().getPgpDecryptionService().isRunning()) {
+				keychainUnlock = KEYCHAIN_UNLOCK_REQUIRED;
+			} else {
+				keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
+			}
+		}
+	}
 
-					}
-					activity.xmppConnectionService.updateConversationUi();
-				}
-			});
+	@Nullable
+	private Message getLastPgpDecryptableMessage() {
+		for (final Message message : this.messageList) {
+			if (message.getEncryption() == Message.ENCRYPTION_PGP
+					&& (message.getStatus() == Message.STATUS_RECEIVED || message.getStatus() >= Message.STATUS_SEND)
+					&& message.getTransferable() == null) {
+				return message;
+			}
 		}
+		return null;
 	}
 
 	private void messageSent() {
@@ -861,84 +903,88 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		updateChatMsgHint();
 	}
 
+	public void setFocusOnInputField() {
+		mEditMessage.requestFocus();
+	}
+
 	enum SendButtonAction {TEXT, TAKE_PHOTO, SEND_LOCATION, RECORD_VOICE, CANCEL, CHOOSE_PICTURE}
 
-	private int getSendButtonImageResource(SendButtonAction action, int status) {
+	private int getSendButtonImageResource(SendButtonAction action, Presence.Status status) {
 		switch (action) {
 			case TEXT:
 				switch (status) {
-					case Presences.CHAT:
-					case Presences.ONLINE:
+					case CHAT:
+					case ONLINE:
 						return R.drawable.ic_send_text_online;
-					case Presences.AWAY:
+					case AWAY:
 						return R.drawable.ic_send_text_away;
-					case Presences.XA:
-					case Presences.DND:
+					case XA:
+					case DND:
 						return R.drawable.ic_send_text_dnd;
 					default:
 						return R.drawable.ic_send_text_offline;
 				}
 			case TAKE_PHOTO:
 				switch (status) {
-					case Presences.CHAT:
-					case Presences.ONLINE:
+					case CHAT:
+					case ONLINE:
 						return R.drawable.ic_send_photo_online;
-					case Presences.AWAY:
+					case AWAY:
 						return R.drawable.ic_send_photo_away;
-					case Presences.XA:
-					case Presences.DND:
+					case XA:
+					case DND:
 						return R.drawable.ic_send_photo_dnd;
 					default:
 						return R.drawable.ic_send_photo_offline;
 				}
 			case RECORD_VOICE:
 				switch (status) {
-					case Presences.CHAT:
-					case Presences.ONLINE:
+					case CHAT:
+					case ONLINE:
 						return R.drawable.ic_send_voice_online;
-					case Presences.AWAY:
+					case AWAY:
 						return R.drawable.ic_send_voice_away;
-					case Presences.XA:
-					case Presences.DND:
+					case XA:
+					case DND:
 						return R.drawable.ic_send_voice_dnd;
 					default:
 						return R.drawable.ic_send_voice_offline;
 				}
 			case SEND_LOCATION:
 				switch (status) {
-					case Presences.CHAT:
-					case Presences.ONLINE:
+					case CHAT:
+					case ONLINE:
 						return R.drawable.ic_send_location_online;
-					case Presences.AWAY:
+					case AWAY:
 						return R.drawable.ic_send_location_away;
-					case Presences.XA:
-					case Presences.DND:
+					case XA:
+					case DND:
 						return R.drawable.ic_send_location_dnd;
 					default:
 						return R.drawable.ic_send_location_offline;
 				}
 			case CANCEL:
 				switch (status) {
-					case Presences.CHAT:
-					case Presences.ONLINE:
+					case CHAT:
+					case ONLINE:
 						return R.drawable.ic_send_cancel_online;
-					case Presences.AWAY:
+					case AWAY:
 						return R.drawable.ic_send_cancel_away;
-					case Presences.XA:
-					case Presences.DND:
+					case XA:
+					case DND:
 						return R.drawable.ic_send_cancel_dnd;
 					default:
 						return R.drawable.ic_send_cancel_offline;
 				}
 			case CHOOSE_PICTURE:
 				switch (status) {
-					case Presences.CHAT:
-					case Presences.ONLINE:
+					case CHAT:
+					case ONLINE:
 						return R.drawable.ic_send_picture_online;
-					case Presences.AWAY:
+					case AWAY:
 						return R.drawable.ic_send_picture_away;
-					case Presences.XA:
-					case Presences.DND:
+					case XA:
+					case DND:
 						return R.drawable.ic_send_picture_dnd;
 					default:
 						return R.drawable.ic_send_picture_offline;
@@ -950,8 +996,9 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 	public void updateSendButton() {
 		final Conversation c = this.conversation;
 		final SendButtonAction action;
-		final int status;
-		final boolean empty = this.mEditMessage == null || this.mEditMessage.getText().length() == 0;
+		final Presence.Status status;
+		final String text = this.mEditMessage == null ? "" : this.mEditMessage.getText().toString();
+		final boolean empty = text.length() == 0;
 		final boolean conference = c.getMode() == Conversation.MODE_MULTI;
 		if (conference && !c.getAccount().httpUploadAvailable()) {
 			if (empty && c.getNextCounterpart() != null) {
@@ -997,10 +1044,10 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 			if (c.getMode() == Conversation.MODE_SINGLE) {
 				status = c.getContact().getMostAvailableStatus();
 			} else {
-				status = c.getMucOptions().online() ? Presences.ONLINE : Presences.OFFLINE;
+				status = c.getMucOptions().online() ? Presence.Status.ONLINE : Presence.Status.OFFLINE;
 			}
 		} else {
-			status = Presences.OFFLINE;
+			status = Presence.Status.OFFLINE;
 		}
 		this.mSendButton.setTag(action);
 		this.mSendButton.setImageResource(getSendButtonImageResource(action, status));
@@ -1031,14 +1078,15 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		}
 	}
 
-	protected void showSnackbar(final int message, final int action,
-								final OnClickListener clickListener) {
+	protected void showSnackbar(final int message, final int action, final OnClickListener clickListener) {
 		snackbar.setVisibility(View.VISIBLE);
 		snackbar.setOnClickListener(null);
 		snackbarMessage.setText(message);
 		snackbarMessage.setOnClickListener(null);
-		snackbarAction.setVisibility(View.VISIBLE);
-		snackbarAction.setText(action);
+		snackbarAction.setVisibility(clickListener == null ? View.GONE : View.VISIBLE);
+		if (action != 0) {
+			snackbarAction.setText(action);
+		}
 		snackbarAction.setOnClickListener(clickListener);
 	}
 
@@ -1056,81 +1104,85 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		final ConversationActivity activity = (ConversationActivity) getActivity();
 		final XmppConnectionService xmppService = activity.xmppConnectionService;
 		final Contact contact = message.getConversation().getContact();
-		if (activity.hasPgp()) {
-			if (conversation.getMode() == Conversation.MODE_SINGLE) {
-				if (contact.getPgpKeyId() != 0) {
-					xmppService.getPgpEngine().hasKey(contact,
-							new UiCallback<Contact>() {
-
-								@Override
-								public void userInputRequried(PendingIntent pi,
-															  Contact contact) {
-									activity.runIntent(
-											pi,
-											ConversationActivity.REQUEST_ENCRYPT_MESSAGE);
-								}
-
-								@Override
-								public void success(Contact contact) {
-									messageSent();
-									activity.encryptTextMessage(message);
-								}
+		if (!activity.hasPgp()) {
+			activity.showInstallPgpDialog();
+			return;
+		}
+		if (conversation.getAccount().getPgpSignature() == null) {
+			activity.announcePgp(conversation.getAccount(), conversation);
+			return;
+		}
+		if (conversation.getMode() == Conversation.MODE_SINGLE) {
+			if (contact.getPgpKeyId() != 0) {
+				xmppService.getPgpEngine().hasKey(contact,
+						new UiCallback<Contact>() {
+
+							@Override
+							public void userInputRequried(PendingIntent pi,
+														  Contact contact) {
+								activity.runIntent(
+										pi,
+										ConversationActivity.REQUEST_ENCRYPT_MESSAGE);
+							}
 
-								@Override
-								public void error(int error, Contact contact) {
+							@Override
+							public void success(Contact contact) {
+								messageSent();
+								activity.encryptTextMessage(message);
+							}
 
-								}
-							});
+							@Override
+							public void error(int error, Contact contact) {
+								System.out.println();
+							}
+						});
 
-				} else {
-					showNoPGPKeyDialog(false,
-							new DialogInterface.OnClickListener() {
-
-								@Override
-								public void onClick(DialogInterface dialog,
-													int which) {
-									conversation
-											.setNextEncryption(Message.ENCRYPTION_NONE);
-									xmppService.databaseBackend
-											.updateConversation(conversation);
-									message.setEncryption(Message.ENCRYPTION_NONE);
-									xmppService.sendMessage(message);
-									messageSent();
-								}
-							});
-				}
 			} else {
-				if (conversation.getMucOptions().pgpKeysInUse()) {
-					if (!conversation.getMucOptions().everybodyHasKeys()) {
-						Toast warning = Toast
-								.makeText(getActivity(),
-										R.string.missing_public_keys,
-										Toast.LENGTH_LONG);
-						warning.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
-						warning.show();
-					}
-					activity.encryptTextMessage(message);
-					messageSent();
-				} else {
-					showNoPGPKeyDialog(true,
-							new DialogInterface.OnClickListener() {
-
-								@Override
-								public void onClick(DialogInterface dialog,
-													int which) {
-									conversation
-											.setNextEncryption(Message.ENCRYPTION_NONE);
-									message.setEncryption(Message.ENCRYPTION_NONE);
-									xmppService.databaseBackend
-											.updateConversation(conversation);
-									xmppService.sendMessage(message);
-									messageSent();
-								}
-							});
-				}
+				showNoPGPKeyDialog(false,
+						new DialogInterface.OnClickListener() {
+
+							@Override
+							public void onClick(DialogInterface dialog,
+												int which) {
+								conversation
+										.setNextEncryption(Message.ENCRYPTION_NONE);
+								xmppService.databaseBackend
+										.updateConversation(conversation);
+								message.setEncryption(Message.ENCRYPTION_NONE);
+								xmppService.sendMessage(message);
+								messageSent();
+							}
+						});
 			}
 		} else {
-			activity.showInstallPgpDialog();
+			if (conversation.getMucOptions().pgpKeysInUse()) {
+				if (!conversation.getMucOptions().everybodyHasKeys()) {
+					Toast warning = Toast
+							.makeText(getActivity(),
+									R.string.missing_public_keys,
+									Toast.LENGTH_LONG);
+					warning.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
+					warning.show();
+				}
+				activity.encryptTextMessage(message);
+				messageSent();
+			} else {
+				showNoPGPKeyDialog(true,
+						new DialogInterface.OnClickListener() {
+
+							@Override
+							public void onClick(DialogInterface dialog,
+												int which) {
+								conversation
+										.setNextEncryption(Message.ENCRYPTION_NONE);
+								message.setEncryption(Message.ENCRYPTION_NONE);
+								xmppService.databaseBackend
+										.updateConversation(conversation);
+								xmppService.sendMessage(message);
+								messageSent();
+							}
+						});
+			}
 		}
 	}
 
@@ -1151,19 +1203,26 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		builder.create().show();
 	}
 
+	protected void sendAxolotlMessage(final Message message) {
+		final ConversationActivity activity = (ConversationActivity) getActivity();
+		final XmppConnectionService xmppService = activity.xmppConnectionService;
+		xmppService.sendMessage(message);
+		messageSent();
+	}
+
 	protected void sendOtrMessage(final Message message) {
 		final ConversationActivity activity = (ConversationActivity) getActivity();
 		final XmppConnectionService xmppService = activity.xmppConnectionService;
 		activity.selectPresence(message.getConversation(),
-                new OnPresenceSelected() {
+				new OnPresenceSelected() {
 
-                    @Override
-                    public void onPresenceSelected() {
-                        message.setCounterpart(conversation.getNextCounterpart());
-                        xmppService.sendMessage(message);
-                        messageSent();
-                    }
-                });
+					@Override
+					public void onPresenceSelected() {
+						message.setCounterpart(conversation.getNextCounterpart());
+						xmppService.sendMessage(message);
+						messageSent();
+					}
+				});
 	}
 
 	public void appendText(String text) {
@@ -1193,6 +1252,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		if (status == Account.State.ONLINE && conversation.setOutgoingChatState(ChatState.COMPOSING)) {
 			activity.xmppConnectionService.sendChatState(conversation);
 		}
+		activity.hideConversationsOverview();
 		updateSendButton();
 	}
 
@@ -1213,6 +1273,72 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		updateSendButton();
 	}
 
+	private int completionIndex = 0;
+	private int lastCompletionLength = 0;
+	private String incomplete;
+	private int lastCompletionCursor;
+	private boolean firstWord = false;
+
+	@Override
+	public boolean onTabPressed(boolean repeated) {
+		if (conversation == null || conversation.getMode() == Conversation.MODE_SINGLE) {
+			return false;
+		}
+		if (repeated) {
+			completionIndex++;
+		} else {
+			lastCompletionLength = 0;
+			completionIndex = 0;
+			final String content = mEditMessage.getText().toString();
+			lastCompletionCursor = mEditMessage.getSelectionEnd();
+			int start = lastCompletionCursor > 0 ? content.lastIndexOf(" ",lastCompletionCursor-1) + 1 : 0;
+			firstWord = start == 0;
+			incomplete = content.substring(start,lastCompletionCursor);
+		}
+		List<String> completions = new ArrayList<>();
+		for(MucOptions.User user : conversation.getMucOptions().getUsers()) {
+			if (user.getName().startsWith(incomplete)) {
+				completions.add(user.getName()+(firstWord ? ": " : " "));
+			}
+		}
+		Collections.sort(completions);
+		if (completions.size() > completionIndex) {
+			String completion = completions.get(completionIndex).substring(incomplete.length());
+			mEditMessage.getEditableText().delete(lastCompletionCursor,lastCompletionCursor + lastCompletionLength);
+			mEditMessage.getEditableText().insert(lastCompletionCursor, completion);
+			lastCompletionLength = completion.length();
+		} else {
+			completionIndex = -1;
+			mEditMessage.getEditableText().delete(lastCompletionCursor,lastCompletionCursor + lastCompletionLength);
+			lastCompletionLength = 0;
+		}
+		return true;
+	}
+
+	@Override
+	public void onActivityResult(int requestCode, int resultCode,
+	                                final Intent data) {
+		if (resultCode == Activity.RESULT_OK) {
+			if (requestCode == ConversationActivity.REQUEST_DECRYPT_PGP) {
+				activity.getSelectedConversation().getAccount().getPgpDecryptionService().onKeychainUnlocked();
+				keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
+				updatePgpMessages();
+			} else if (requestCode == ConversationActivity.REQUEST_TRUST_KEYS_TEXT) {
+				final String body = mEditMessage.getText().toString();
+				Message message = new Message(conversation, body, conversation.getNextEncryption());
+				sendAxolotlMessage(message);
+			} else if (requestCode == ConversationActivity.REQUEST_TRUST_KEYS_MENU) {
+				int choice = data.getIntExtra("choice", ConversationActivity.ATTACHMENT_CHOICE_INVALID);
+				activity.selectPresenceToAttachFile(choice, conversation.getNextEncryption());
+			}
+		} else {
+			if (requestCode == ConversationActivity.REQUEST_DECRYPT_PGP) {
+				keychainUnlock = KEYCHAIN_UNLOCK_NOT_REQUIRED;
+				updatePgpMessages();
+			}
+		}
+	}
+
     private void changeEmojiKeyboardIcon(ImageView iconToBeChanged, int drawableResourceId){
         iconToBeChanged.setImageResource(drawableResourceId);
     }
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/EditAccountActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/EditAccountActivity.java
index 601ddedc..7da2e889 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/EditAccountActivity.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/EditAccountActivity.java
@@ -1,8 +1,17 @@
 package de.thedevstack.conversationsplus.ui;
 
+import android.app.AlertDialog;
+import android.app.AlertDialog.Builder;
 import android.app.PendingIntent;
+import android.content.DialogInterface;
 import android.content.Intent;
+import android.content.SharedPreferences;
+import android.graphics.Bitmap;
+import android.net.Uri;
 import android.os.Bundle;
+import android.provider.Settings;
+import android.security.KeyChain;
+import android.security.KeyChainAliasCallback;
 import android.text.Editable;
 import android.text.TextWatcher;
 import android.view.Menu;
@@ -20,23 +29,38 @@ import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.RelativeLayout;
 import android.widget.TableLayout;
+import android.widget.TableRow;
 import android.widget.TextView;
 import android.widget.Toast;
 
+import java.util.Arrays;
+import java.util.List;
+import java.util.Set;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import de.thedevstack.conversationsplus.ui.listeners.ShowResourcesListDialogListener;
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.crypto.axolotl.AxolotlService;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.services.AvatarService;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
 import de.thedevstack.conversationsplus.services.XmppConnectionService.OnAccountUpdate;
+import de.thedevstack.conversationsplus.services.XmppConnectionService.OnCaptchaRequested;
 import de.thedevstack.conversationsplus.ui.adapter.KnownHostsAdapter;
-import de.thedevstack.conversationsplus.ui.listeners.ShowResourcesListDialogListener;
 import de.thedevstack.conversationsplus.utils.CryptoHelper;
 import de.thedevstack.conversationsplus.utils.UIHelper;
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.OnKeyStatusUpdated;
+import de.thedevstack.conversationsplus.xmpp.XmppConnection;
 import de.thedevstack.conversationsplus.xmpp.XmppConnection.Features;
+import de.thedevstack.conversationsplus.xmpp.forms.Data;
 import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 import de.thedevstack.conversationsplus.xmpp.pep.Avatar;
 
-public class EditAccountActivity extends XmppActivity implements OnAccountUpdate{
+public class EditAccountActivity extends XmppActivity implements OnAccountUpdate,
+		OnKeyStatusUpdated, OnCaptchaRequested, KeyChainAliasCallback, XmppConnectionService.OnShowErrorToast, XmppConnectionService.OnMamPreferencesFetched {
 
 	private AutoCompleteTextView mAccountJid;
 	private EditText mPassword;
@@ -44,9 +68,11 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 	private CheckBox mRegisterNew;
 	private Button mCancelButton;
 	private Button mSaveButton;
+	private Button mDisableBatterOptimizations;
 	private TableLayout mMoreTable;
 
 	private LinearLayout mStats;
+	private RelativeLayout mBatteryOptimizations;
 	private TextView mServerInfoSm;
 	private TextView mServerInfoRosterVersion;
 	private TextView mServerInfoCarbons;
@@ -54,14 +80,30 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 	private TextView mServerInfoCSI;
 	private TextView mServerInfoBlocking;
 	private TextView mServerInfoPep;
+	private TextView mServerInfoHttpUpload;
+	private TextView mServerInfoPush;
 	private TextView mSessionEst;
 	private TextView mOtrFingerprint;
+	private TextView mAxolotlFingerprint;
+	private TextView mAccountJidLabel;
 	private ImageView mAvatar;
 	private RelativeLayout mOtrFingerprintBox;
+	private RelativeLayout mAxolotlFingerprintBox;
 	private ImageButton mOtrFingerprintToClipboardButton;
+	private ImageButton mAxolotlFingerprintToClipboardButton;
+	private ImageButton mRegenerateAxolotlKeyButton;
+	private LinearLayout keys;
+	private LinearLayout keysCard;
+	private LinearLayout mNamePort;
+	private EditText mHostname;
+	private EditText mPort;
+	private AlertDialog mCaptchaDialog = null;
 
 	private Jid jidToEdit;
+	private boolean mInitMode = false;
+	private boolean mShowOptions = false;
 	private Account mAccount;
+	private String messageFingerprint;
 
 	private boolean mFetchingAvatar = false;
 
@@ -69,22 +111,67 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 
 		@Override
 		public void onClick(final View v) {
+			if (mInitMode && mAccount != null) {
+				mAccount.setOption(Account.OPTION_DISABLED, false);
+			}
 			if (mAccount != null && mAccount.getStatus() == Account.State.DISABLED && !accountInfoEdited()) {
 				mAccount.setOption(Account.OPTION_DISABLED, false);
 				xmppConnectionService.updateAccount(mAccount);
 				return;
 			}
-			final boolean registerNewAccount = mRegisterNew.isChecked();
+			final boolean registerNewAccount = mRegisterNew.isChecked() && !Config.DISALLOW_REGISTRATION_IN_UI;
+			if (Config.DOMAIN_LOCK != null && mAccountJid.getText().toString().contains("@")) {
+				mAccountJid.setError(getString(R.string.invalid_username));
+				mAccountJid.requestFocus();
+				return;
+			}
 			final Jid jid;
 			try {
-				jid = Jid.fromString(mAccountJid.getText().toString());
+				if (Config.DOMAIN_LOCK != null) {
+					jid = Jid.fromParts(mAccountJid.getText().toString(), Config.DOMAIN_LOCK, null);
+				} else {
+					jid = Jid.fromString(mAccountJid.getText().toString());
+				}
 			} catch (final InvalidJidException e) {
-				mAccountJid.setError(getString(R.string.invalid_jid));
+				if (Config.DOMAIN_LOCK != null) {
+					mAccountJid.setError(getString(R.string.invalid_username));
+				} else {
+					mAccountJid.setError(getString(R.string.invalid_jid));
+				}
 				mAccountJid.requestFocus();
 				return;
 			}
+			String hostname = null;
+			int numericPort = 5222;
+			if (mShowOptions) {
+				hostname = mHostname.getText().toString();
+				final String port = mPort.getText().toString();
+				if (hostname.contains(" ")) {
+					mHostname.setError(getString(R.string.not_valid_hostname));
+					mHostname.requestFocus();
+					return;
+				}
+				try {
+					numericPort = Integer.parseInt(port);
+					if (numericPort < 0 || numericPort > 65535) {
+						mPort.setError(getString(R.string.not_a_valid_port));
+						mPort.requestFocus();
+						return;
+					}
+
+				} catch (NumberFormatException e) {
+					mPort.setError(getString(R.string.not_a_valid_port));
+					mPort.requestFocus();
+					return;
+				}
+			}
+
 			if (jid.isDomainJid()) {
-				mAccountJid.setError(getString(R.string.invalid_jid));
+				if (Config.DOMAIN_LOCK != null) {
+					mAccountJid.setError(getString(R.string.invalid_username));
+				} else {
+					mAccountJid.setError(getString(R.string.invalid_jid));
+				}
 				mAccountJid.requestFocus();
 				return;
 			}
@@ -98,34 +185,33 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 				}
 			}
 			if (mAccount != null) {
-				try {
-					mAccount.setUsername(jid.hasLocalpart() ? jid.getLocalpart() : "");
-					mAccount.setServer(jid.getDomainpart());
-				} catch (final InvalidJidException ignored) {
-					return;
-				}
+				mAccount.setJid(jid);
+				mAccount.setPort(numericPort);
+				mAccount.setHostname(hostname);
 				mAccountJid.setError(null);
 				mPasswordConfirm.setError(null);
 				mAccount.setPassword(password);
 				mAccount.setOption(Account.OPTION_REGISTER, registerNewAccount);
 				xmppConnectionService.updateAccount(mAccount);
 			} else {
-				try {
-					if (xmppConnectionService.findAccountByJid(Jid.fromString(mAccountJid.getText().toString())) != null) {
-						mAccountJid.setError(getString(R.string.account_already_exists));
-						mAccountJid.requestFocus();
-						return;
-					}
-				} catch (final InvalidJidException e) {
+				if (xmppConnectionService.findAccountByJid(jid) != null) {
+					mAccountJid.setError(getString(R.string.account_already_exists));
+					mAccountJid.requestFocus();
 					return;
 				}
 				mAccount = new Account(jid.toBareJid(), password);
+				mAccount.setPort(numericPort);
+				mAccount.setHostname(hostname);
 				mAccount.setOption(Account.OPTION_USETLS, true);
 				mAccount.setOption(Account.OPTION_USECOMPRESSION, true);
 				mAccount.setOption(Account.OPTION_REGISTER, registerNewAccount);
 				xmppConnectionService.createAccount(mAccount);
 			}
-			if (jidToEdit != null && !mAccount.isOptionSet(Account.OPTION_DISABLED)) {
+			mHostname.setError(null);
+			mPort.setError(null);
+			if (!mAccount.isOptionSet(Account.OPTION_DISABLED)
+					&& !registerNewAccount
+					&& !mInitMode) {
 				finish();
 			} else {
 				updateSaveButton();
@@ -141,35 +227,35 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 			finish();
 		}
 	};
+	private Toast mFetchingMamPrefsToast;
+	private TableRow mPushRow;
+
+	public void refreshUiReal() {
+		invalidateOptionsMenu();
+		if (mAccount != null
+				&& mAccount.getStatus() != Account.State.ONLINE
+				&& mFetchingAvatar) {
+			startActivity(new Intent(getApplicationContext(),
+					ManageAccountActivity.class));
+			finish();
+		} else if (mInitMode && mAccount != null && mAccount.getStatus() == Account.State.ONLINE) {
+			if (!mFetchingAvatar) {
+				mFetchingAvatar = true;
+				AvatarService.getInstance().checkForAvatar(mAccount, mAvatarFetchCallback);
+			}
+		} else {
+			updateSaveButton();
+		}
+		if (mAccount != null) {
+			updateAccountInformation(false);
+		}
+	}
+
 	@Override
 	public void onAccountUpdate() {
-		runOnUiThread(new Runnable() {
-
-			@Override
-			public void run() {
-				invalidateOptionsMenu();
-				if (mAccount != null
-						&& mAccount.getStatus() != Account.State.ONLINE
-						&& mFetchingAvatar) {
-					startActivity(new Intent(getApplicationContext(),
-								ManageAccountActivity.class));
-					finish();
-				} else if (jidToEdit == null && mAccount != null
-						&& mAccount.getStatus() == Account.State.ONLINE) {
-					if (!mFetchingAvatar) {
-						mFetchingAvatar = true;
-						AvatarService.getInstance().checkForAvatar(mAccount,
-								mAvatarFetchCallback);
-					}
-				} else {
-					updateSaveButton();
-				}
-				if (mAccount != null) {
-					updateAccountInformation(false);
-				}
-			}
-		});
+		refreshUi();
 	}
+
 	private final UiCallback<Avatar> mAvatarFetchCallback = new UiCallback<Avatar>() {
 
 		@Override
@@ -208,9 +294,8 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 		@Override
 		public void onClick(final View view) {
 			if (mAccount != null) {
-				final Intent intent = new Intent(getApplicationContext(),
-						PublishProfilePictureActivity.class);
-				intent.putExtra("account", mAccount.getJid().toBareJid().toString());
+				final Intent intent = new Intent(getApplicationContext(), PublishProfilePictureActivity.class);
+				intent.putExtra(EXTRA_ACCOUNT, mAccount.getJid().toBareJid().toString());
 				startActivity(intent);
 			}
 		}
@@ -222,16 +307,15 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 			@Override
 			public void run() {
 				final Intent intent;
-				if (avatar != null) {
-					intent = new Intent(getApplicationContext(),
-							StartConversationActivity.class);
+				final XmppConnection connection = mAccount.getXmppConnection();
+				if (avatar != null || (connection != null && !connection.getFeatures().pep())) {
+					intent = new Intent(getApplicationContext(), StartConversationActivity.class);
 					if (xmppConnectionService != null && xmppConnectionService.getAccounts().size() == 1) {
 						intent.putExtra("init", true);
 					}
 				} else {
-					intent = new Intent(getApplicationContext(),
-							PublishProfilePictureActivity.class);
-					intent.putExtra("account", mAccount.getJid().toBareJid().toString());
+					intent = new Intent(getApplicationContext(), PublishProfilePictureActivity.class);
+					intent.putExtra(EXTRA_ACCOUNT, mAccount.getJid().toBareJid().toString());
 					intent.putExtra("setup", true);
 				}
 				startActivity(intent);
@@ -240,8 +324,16 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 		});
 	}
 
+	@Override
+	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+		super.onActivityResult(requestCode, resultCode, data);
+		if (requestCode == REQUEST_BATTERY_OP) {
+			updateAccountInformation(mAccount == null);
+		}
+	}
+
 	protected void updateSaveButton() {
-		if (accountInfoEdited() && jidToEdit != null) {
+		if (accountInfoEdited() && !mInitMode) {
 			this.mSaveButton.setText(R.string.save);
 			this.mSaveButton.setEnabled(true);
 			this.mSaveButton.setTextColor(getPrimaryTextColor());
@@ -249,14 +341,14 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 			this.mSaveButton.setEnabled(false);
 			this.mSaveButton.setTextColor(getSecondaryTextColor());
 			this.mSaveButton.setText(R.string.account_status_connecting);
-		} else if (mAccount != null && mAccount.getStatus() == Account.State.DISABLED) {
+		} else if (mAccount != null && mAccount.getStatus() == Account.State.DISABLED && !mInitMode) {
 			this.mSaveButton.setEnabled(true);
 			this.mSaveButton.setTextColor(getPrimaryTextColor());
 			this.mSaveButton.setText(R.string.enable);
 		} else {
 			this.mSaveButton.setEnabled(true);
 			this.mSaveButton.setTextColor(getPrimaryTextColor());
-			if (jidToEdit != null) {
+			if (!mInitMode) {
 				if (mAccount != null && mAccount.isOnlineAndConnected()) {
 					this.mSaveButton.setText(R.string.save);
 					if (!accountInfoEdited()) {
@@ -273,15 +365,24 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 	}
 
 	protected boolean accountInfoEdited() {
-		return this.mAccount != null && (!this.mAccount.getJid().toBareJid().toString().equals(
-					this.mAccountJid.getText().toString())
-			|| !this.mAccount.getPassword().equals(
-						this.mPassword.getText().toString()));
+		if (this.mAccount == null) {
+			return false;
+		}
+		final String unmodified;
+		if (Config.DOMAIN_LOCK != null) {
+			unmodified = this.mAccount.getJid().getLocalpart();
+		} else {
+			unmodified = this.mAccount.getJid().toBareJid().toString();
+		}
+		return !unmodified.equals(this.mAccountJid.getText().toString()) ||
+				!this.mAccount.getPassword().equals(this.mPassword.getText().toString()) ||
+				!this.mAccount.getHostname().equals(this.mHostname.getText().toString()) ||
+				!String.valueOf(this.mAccount.getPort()).equals(this.mPort.getText().toString());
 	}
 
 	@Override
 	protected String getShareableUri() {
-		if (mAccount!=null) {
+		if (mAccount != null) {
 			return mAccount.getShareableUri();
 		} else {
 			return "";
@@ -294,6 +395,11 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 		setContentView(R.layout.activity_edit_account);
 		this.mAccountJid = (AutoCompleteTextView) findViewById(R.id.account_jid);
 		this.mAccountJid.addTextChangedListener(this.mTextWatcher);
+		this.mAccountJidLabel = (TextView) findViewById(R.id.account_jid_label);
+		if (Config.DOMAIN_LOCK != null) {
+			this.mAccountJidLabel.setText(R.string.username);
+			this.mAccountJid.setHint(R.string.username_hint);
+		}
 		this.mPassword = (EditText) findViewById(R.id.account_password);
 		this.mPassword.addTextChangedListener(this.mTextWatcher);
 		this.mPasswordConfirm = (EditText) findViewById(R.id.account_password_confirm);
@@ -301,6 +407,17 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 		this.mAvatar.setOnClickListener(this.mAvatarClickListener);
 		this.mRegisterNew = (CheckBox) findViewById(R.id.account_register_new);
 		this.mStats = (LinearLayout) findViewById(R.id.stats);
+		this.mBatteryOptimizations = (RelativeLayout) findViewById(R.id.battery_optimization);
+		this.mDisableBatterOptimizations = (Button) findViewById(R.id.batt_op_disable);
+		this.mDisableBatterOptimizations.setOnClickListener(new OnClickListener() {
+			@Override
+			public void onClick(View v) {
+				Intent intent = new Intent(Settings.ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS);
+				Uri uri = Uri.parse("package:"+getPackageName());
+				intent.setData(uri);
+				startActivityForResult(intent,REQUEST_BATTERY_OP);
+			}
+		});
 		this.mSessionEst = (TextView) findViewById(R.id.session_est);
 		this.mServerInfoRosterVersion = (TextView) findViewById(R.id.server_info_roster_version);
 		this.mServerInfoCarbons = (TextView) findViewById(R.id.server_info_carbons);
@@ -309,9 +426,24 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 		this.mServerInfoBlocking = (TextView) findViewById(R.id.server_info_blocking);
 		this.mServerInfoSm = (TextView) findViewById(R.id.server_info_sm);
 		this.mServerInfoPep = (TextView) findViewById(R.id.server_info_pep);
+		this.mServerInfoHttpUpload = (TextView) findViewById(R.id.server_info_http_upload);
+		this.mPushRow = (TableRow) findViewById(R.id.push_row);
+		this.mServerInfoPush = (TextView) findViewById(R.id.server_info_push);
 		this.mOtrFingerprint = (TextView) findViewById(R.id.otr_fingerprint);
 		this.mOtrFingerprintBox = (RelativeLayout) findViewById(R.id.otr_fingerprint_box);
 		this.mOtrFingerprintToClipboardButton = (ImageButton) findViewById(R.id.action_copy_to_clipboard);
+		this.mAxolotlFingerprint = (TextView) findViewById(R.id.axolotl_fingerprint);
+		this.mAxolotlFingerprintBox = (RelativeLayout) findViewById(R.id.axolotl_fingerprint_box);
+		this.mAxolotlFingerprintToClipboardButton = (ImageButton) findViewById(R.id.action_copy_axolotl_to_clipboard);
+		this.mRegenerateAxolotlKeyButton = (ImageButton) findViewById(R.id.action_regenerate_axolotl_key);
+		this.keysCard = (LinearLayout) findViewById(R.id.other_device_keys_card);
+		this.keys = (LinearLayout) findViewById(R.id.other_device_keys);
+		this.mNamePort = (LinearLayout) findViewById(R.id.name_port);
+		this.mHostname = (EditText) findViewById(R.id.hostname);
+		this.mHostname.addTextChangedListener(mTextWatcher);
+		this.mPort = (EditText) findViewById(R.id.port);
+		this.mPort.setText("5222");
+		this.mPort.addTextChangedListener(mTextWatcher);
 		this.mSaveButton = (Button) findViewById(R.id.save_button);
 		this.mCancelButton = (Button) findViewById(R.id.cancel_button);
 		this.mSaveButton.setOnClickListener(this.mSaveButtonClickListener);
@@ -320,7 +452,7 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 		final OnCheckedChangeListener OnCheckedShowConfirmPassword = new OnCheckedChangeListener() {
 			@Override
 			public void onCheckedChanged(final CompoundButton buttonView,
-					final boolean isChecked) {
+										 final boolean isChecked) {
 				if (isChecked) {
 					mPasswordConfirm.setVisibility(View.VISIBLE);
 				} else {
@@ -330,6 +462,9 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 			}
 		};
 		this.mRegisterNew.setOnCheckedChangeListener(OnCheckedShowConfirmPassword);
+		if (Config.DISALLOW_REGISTRATION_IN_UI) {
+			this.mRegisterNew.setVisibility(View.GONE);
+		}
 	}
 
 	@Override
@@ -340,6 +475,12 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 		final MenuItem showBlocklist = menu.findItem(R.id.action_show_block_list);
 		final MenuItem showMoreInfo = menu.findItem(R.id.action_server_info_show_more);
 		final MenuItem changePassword = menu.findItem(R.id.action_change_password_on_server);
+		final MenuItem clearDevices = menu.findItem(R.id.action_clear_devices);
+		final MenuItem renewCertificate = menu.findItem(R.id.action_renew_certificate);
+		final MenuItem mamPrefs = menu.findItem(R.id.action_mam_prefs);
+
+		renewCertificate.setVisible(mAccount != null && mAccount.getPrivateKeyAlias() != null);
+
 		if (mAccount != null && mAccount.isOnlineAndConnected()) {
 			if (!mAccount.getXmppConnection().getFeatures().blocking()) {
 				showBlocklist.setVisible(false);
@@ -347,11 +488,18 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 			if (!mAccount.getXmppConnection().getFeatures().register()) {
 				changePassword.setVisible(false);
 			}
+			mamPrefs.setVisible(mAccount.getXmppConnection().getFeatures().mam());
+			Set<Integer> otherDevices = mAccount.getAxolotlService().getOwnDeviceIds();
+			if (otherDevices == null || otherDevices.isEmpty()) {
+				clearDevices.setVisible(false);
+			}
 		} else {
 			showQrCode.setVisible(false);
 			showBlocklist.setVisible(false);
 			showMoreInfo.setVisible(false);
 			changePassword.setVisible(false);
+			clearDevices.setVisible(false);
+			mamPrefs.setVisible(false);
 		}
 		return true;
 	}
@@ -365,7 +513,9 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 			} catch (final InvalidJidException | NullPointerException ignored) {
 				this.jidToEdit = null;
 			}
-			if (this.jidToEdit != null) {
+			this.mInitMode = getIntent().getBooleanExtra("init", false) || this.jidToEdit == null;
+			this.messageFingerprint = getIntent().getStringExtra("fingerprint");
+			if (!mInitMode) {
 				this.mRegisterNew.setVisibility(View.GONE);
 				if (getActionBar() != null) {
 					getActionBar().setTitle(getString(R.string.account_details));
@@ -377,16 +527,24 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 				}
 			}
 		}
+		SharedPreferences preferences = getPreferences();
+		this.mShowOptions = preferences.getBoolean("show_connection_options", false);
+		this.mNamePort.setVisibility(mShowOptions ? View.VISIBLE : View.GONE);
 	}
 
 	@Override
 	protected void onBackendConnected() {
-		final KnownHostsAdapter mKnownHostsAdapter = new KnownHostsAdapter(this,
-				android.R.layout.simple_list_item_1,
-				xmppConnectionService.getKnownHosts());
 		if (this.jidToEdit != null) {
 			this.mAccount = xmppConnectionService.findAccountByJid(jidToEdit);
-			updateAccountInformation(true);
+			if (this.mAccount != null) {
+				if (this.mAccount.getPrivateKeyAlias() != null) {
+					this.mPassword.setHint(R.string.authenticate_with_certificate);
+					if (this.mInitMode) {
+						this.mPassword.requestFocus();
+					}
+				}
+				updateAccountInformation(true);
+			}
 		} else if (this.xmppConnectionService.getAccounts().size() == 0) {
 			if (getActionBar() != null) {
 				getActionBar().setDisplayHomeAsUpEnabled(false);
@@ -396,8 +554,14 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 			this.mCancelButton.setEnabled(false);
 			this.mCancelButton.setTextColor(getSecondaryTextColor());
 		}
-		this.mAccountJid.setAdapter(mKnownHostsAdapter);
+		if (Config.DOMAIN_LOCK == null) {
+			final KnownHostsAdapter mKnownHostsAdapter = new KnownHostsAdapter(this,
+					android.R.layout.simple_list_item_1,
+					xmppConnectionService.getKnownHosts());
+			this.mAccountJid.setAdapter(mKnownHostsAdapter);
+		}
 		updateSaveButton();
+		invalidateOptionsMenu();
 	}
 
 	@Override
@@ -405,7 +569,7 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 		switch (item.getItemId()) {
 			case R.id.action_show_block_list:
 				final Intent showBlocklistIntent = new Intent(this, BlocklistActivity.class);
-				showBlocklistIntent.putExtra("account", mAccount.getJid().toString());
+				showBlocklistIntent.putExtra(EXTRA_ACCOUNT, mAccount.getJid().toString());
 				startActivity(showBlocklistIntent);
 				break;
 			case R.id.action_server_info_show_more:
@@ -414,19 +578,50 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 				break;
 			case R.id.action_change_password_on_server:
 				final Intent changePasswordIntent = new Intent(this, ChangePasswordActivity.class);
-				changePasswordIntent.putExtra("account", mAccount.getJid().toString());
+				changePasswordIntent.putExtra(EXTRA_ACCOUNT, mAccount.getJid().toString());
 				startActivity(changePasswordIntent);
 				break;
+			case R.id.action_mam_prefs:
+				editMamPrefs();
+				break;
+			case R.id.action_clear_devices:
+				showWipePepDialog();
+				break;
+			case R.id.action_renew_certificate:
+				renewCertificate();
+				break;
 		}
 		return super.onOptionsItemSelected(item);
 	}
 
+	private void renewCertificate() {
+		KeyChain.choosePrivateKeyAlias(this, this, null, null, null, -1, null);
+	}
+
+	@Override
+	public void alias(String alias) {
+		if (alias != null) {
+			xmppConnectionService.updateKeyInAccount(mAccount, alias);
+		}
+	}
+
 	private void updateAccountInformation(boolean init) {
 		if (init) {
-			this.mAccountJid.setText(this.mAccount.getJid().toBareJid().toString());
+			this.mAccountJid.getEditableText().clear();
+			if (Config.DOMAIN_LOCK != null) {
+				this.mAccountJid.getEditableText().append(this.mAccount.getJid().getLocalpart());
+			} else {
+				this.mAccountJid.getEditableText().append(this.mAccount.getJid().toBareJid().toString());
+			}
 			this.mPassword.setText(this.mAccount.getPassword());
+			this.mHostname.setText("");
+			this.mHostname.getEditableText().append(this.mAccount.getHostname());
+			this.mPort.setText("");
+			this.mPort.getEditableText().append(String.valueOf(this.mAccount.getPort()));
+			this.mNamePort.setVisibility(mShowOptions ? View.VISIBLE : View.GONE);
+
 		}
-		if (this.jidToEdit != null) {
+		if (!mInitMode) {
 			this.mAvatar.setVisibility(View.VISIBLE);
 			this.mAvatar.setImageBitmap(AvatarService.getInstance().get(this.mAccount, getPixel(72)));
 		}
@@ -449,8 +644,9 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
                 detailsAccountJid.setText(this.mAccount.getJid().toBareJid().toString());
             }
 			this.mStats.setVisibility(View.VISIBLE);
+			this.mBatteryOptimizations.setVisibility(showBatteryOptimizationWarning() ? View.VISIBLE : View.GONE);
 			this.mSessionEst.setText(UIHelper.readableTimeDifferenceFull(this, this.mAccount.getXmppConnection()
-						.getLastSessionEstablished()));
+					.getLastSessionEstablished()));
 			Features features = this.mAccount.getXmppConnection().getFeatures();
 			if (features.rosterVersioning()) {
 				this.mServerInfoRosterVersion.setText(R.string.server_info_available);
@@ -461,7 +657,7 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 				this.mServerInfoCarbons.setText(R.string.server_info_available);
 			} else {
 				this.mServerInfoCarbons
-					.setText(R.string.server_info_unavailable);
+						.setText(R.string.server_info_unavailable);
 			}
 			if (features.mam()) {
 				this.mServerInfoMam.setText(R.string.server_info_available);
@@ -484,43 +680,286 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 				this.mServerInfoSm.setText(R.string.server_info_unavailable);
 			}
 			if (features.pep()) {
-				this.mServerInfoPep.setText(R.string.server_info_available);
+				AxolotlService axolotlService = this.mAccount.getAxolotlService();
+				if (axolotlService != null && axolotlService.isPepBroken()) {
+					this.mServerInfoPep.setText(R.string.server_info_broken);
+				} else {
+					this.mServerInfoPep.setText(R.string.server_info_available);
+				}
 			} else {
 				this.mServerInfoPep.setText(R.string.server_info_unavailable);
 			}
-			final String fingerprint = this.mAccount.getOtrFingerprint();
-			if (fingerprint != null) {
+			if (features.httpUpload()) {
+				this.mServerInfoHttpUpload.setText(R.string.server_info_available);
+			} else {
+				this.mServerInfoHttpUpload.setText(R.string.server_info_unavailable);
+			}
+
+			this.mPushRow.setVisibility(xmppConnectionService.getPushManagementService().isStub() ? View.GONE : View.VISIBLE);
+
+			if (xmppConnectionService.getPushManagementService().available(mAccount)) {
+				this.mServerInfoPush.setText(R.string.server_info_available);
+			} else {
+				this.mServerInfoPush.setText(R.string.server_info_unavailable);
+			}
+			final String otrFingerprint = this.mAccount.getOtrFingerprint();
+			if (otrFingerprint != null) {
 				this.mOtrFingerprintBox.setVisibility(View.VISIBLE);
-				this.mOtrFingerprint.setText(CryptoHelper.prettifyFingerprint(fingerprint));
+				this.mOtrFingerprint.setText(CryptoHelper.prettifyFingerprint(otrFingerprint));
 				this.mOtrFingerprintToClipboardButton
-					.setVisibility(View.VISIBLE);
+						.setVisibility(View.VISIBLE);
 				this.mOtrFingerprintToClipboardButton
-					.setOnClickListener(new View.OnClickListener() {
+						.setOnClickListener(new View.OnClickListener() {
 
-						@Override
-						public void onClick(final View v) {
+							@Override
+							public void onClick(final View v) {
 
-							if (copyTextToClipboard(fingerprint, R.string.otr_fingerprint)) {
-								Toast.makeText(
-										EditAccountActivity.this,
-										R.string.toast_message_otr_fingerprint,
-										Toast.LENGTH_SHORT).show();
+								if (copyTextToClipboard(otrFingerprint, R.string.otr_fingerprint)) {
+									Toast.makeText(
+											EditAccountActivity.this,
+											R.string.toast_message_otr_fingerprint,
+											Toast.LENGTH_SHORT).show();
+								}
 							}
-						}
-					});
+						});
 			} else {
 				this.mOtrFingerprintBox.setVisibility(View.GONE);
 			}
+			final String axolotlFingerprint = this.mAccount.getAxolotlService().getOwnFingerprint();
+			if (axolotlFingerprint != null) {
+				this.mAxolotlFingerprintBox.setVisibility(View.VISIBLE);
+				this.mAxolotlFingerprint.setText(CryptoHelper.prettifyFingerprint(axolotlFingerprint.substring(2)));
+				this.mAxolotlFingerprintToClipboardButton
+						.setVisibility(View.VISIBLE);
+				this.mAxolotlFingerprintToClipboardButton
+						.setOnClickListener(new View.OnClickListener() {
+
+							@Override
+							public void onClick(final View v) {
+
+								if (copyTextToClipboard(axolotlFingerprint.substring(2), R.string.omemo_fingerprint)) {
+									Toast.makeText(
+											EditAccountActivity.this,
+											R.string.toast_message_omemo_fingerprint,
+											Toast.LENGTH_SHORT).show();
+								}
+							}
+						});
+				if (Config.SHOW_REGENERATE_AXOLOTL_KEYS_BUTTON) {
+					this.mRegenerateAxolotlKeyButton
+							.setVisibility(View.VISIBLE);
+					this.mRegenerateAxolotlKeyButton
+							.setOnClickListener(new View.OnClickListener() {
+
+								@Override
+								public void onClick(final View v) {
+									showRegenerateAxolotlKeyDialog();
+								}
+							});
+				}
+			} else {
+				this.mAxolotlFingerprintBox.setVisibility(View.GONE);
+			}
+			final String ownFingerprint = mAccount.getAxolotlService().getOwnFingerprint();
+			boolean hasKeys = false;
+			keys.removeAllViews();
+			for (final String fingerprint : mAccount.getAxolotlService().getFingerprintsForOwnSessions()) {
+				if (ownFingerprint.equals(fingerprint)) {
+					continue;
+				}
+				boolean highlight = fingerprint.equals(messageFingerprint);
+				hasKeys |= addFingerprintRow(keys, mAccount, fingerprint, highlight, null);
+			}
+			if (hasKeys) {
+				keysCard.setVisibility(View.VISIBLE);
+			} else {
+				keysCard.setVisibility(View.GONE);
+			}
 		} else {
 			if (this.mAccount.errorStatus()) {
-                this.mAccountJid.setError(getString(this.mAccount.getStatus().getReadableId()));
+				final EditText errorTextField;
+				if (this.mAccount.getStatus() == Account.State.UNAUTHORIZED) {
+					errorTextField = this.mPassword;
+				} else if (mShowOptions
+						&& this.mAccount.getStatus() == Account.State.SERVER_NOT_FOUND
+						&& this.mHostname.getText().length() > 0) {
+					errorTextField = this.mHostname;
+				} else {
+					errorTextField = this.mAccountJid;
+				}
+				errorTextField.setError(getString(this.mAccount.getStatus().getReadableId()));
 				if (init || !accountInfoEdited()) {
-					this.mAccountJid.requestFocus();
+					errorTextField.requestFocus();
 				}
 			} else {
 				this.mAccountJid.setError(null);
+				this.mPassword.setError(null);
+				this.mHostname.setError(null);
 			}
 			this.mStats.setVisibility(View.GONE);
 		}
 	}
+
+	public void showRegenerateAxolotlKeyDialog() {
+		Builder builder = new Builder(this);
+		builder.setTitle("Regenerate Key");
+		builder.setIconAttribute(android.R.attr.alertDialogIcon);
+		builder.setMessage("Are you sure you want to regenerate your Identity Key? (This will also wipe all established sessions and contact Identity Keys)");
+		builder.setNegativeButton(getString(R.string.cancel), null);
+		builder.setPositiveButton("Yes",
+				new DialogInterface.OnClickListener() {
+					@Override
+					public void onClick(DialogInterface dialog, int which) {
+						mAccount.getAxolotlService().regenerateKeys(false);
+					}
+				});
+		builder.create().show();
+	}
+
+	public void showWipePepDialog() {
+		Builder builder = new Builder(this);
+		builder.setTitle(getString(R.string.clear_other_devices));
+		builder.setIconAttribute(android.R.attr.alertDialogIcon);
+		builder.setMessage(getString(R.string.clear_other_devices_desc));
+		builder.setNegativeButton(getString(R.string.cancel), null);
+		builder.setPositiveButton(getString(R.string.accept),
+				new DialogInterface.OnClickListener() {
+					@Override
+					public void onClick(DialogInterface dialog, int which) {
+						mAccount.getAxolotlService().wipeOtherPepDevices();
+					}
+				});
+		builder.create().show();
+	}
+
+	private void editMamPrefs() {
+		this.mFetchingMamPrefsToast = Toast.makeText(this, R.string.fetching_mam_prefs, Toast.LENGTH_LONG);
+		this.mFetchingMamPrefsToast.show();
+		xmppConnectionService.fetchMamPreferences(mAccount, this);
+	}
+
+	@Override
+	public void onKeyStatusUpdated(AxolotlService.FetchStatus report) {
+		refreshUi();
+	}
+
+	@Override
+	public void onCaptchaRequested(final Account account, final String id, final Data data,
+								   final Bitmap captcha) {
+		final AlertDialog.Builder builder = new AlertDialog.Builder(this);
+		final ImageView view = new ImageView(this);
+		final LinearLayout layout = new LinearLayout(this);
+		final EditText input = new EditText(this);
+
+		view.setImageBitmap(captcha);
+		view.setScaleType(ImageView.ScaleType.FIT_CENTER);
+
+		input.setHint(getString(R.string.captcha_hint));
+
+		layout.setOrientation(LinearLayout.VERTICAL);
+		layout.addView(view);
+		layout.addView(input);
+
+		builder.setTitle(getString(R.string.captcha_required));
+		builder.setView(layout);
+
+		builder.setPositiveButton(getString(R.string.ok),
+				new DialogInterface.OnClickListener() {
+					@Override
+					public void onClick(DialogInterface dialog, int which) {
+						String rc = input.getText().toString();
+						data.put("username", account.getUsername());
+						data.put("password", account.getPassword());
+						data.put("ocr", rc);
+						data.submit();
+
+						if (xmppConnectionServiceBound) {
+							xmppConnectionService.sendCreateAccountWithCaptchaPacket(
+									account, id, data);
+						}
+					}
+				});
+		builder.setNegativeButton(getString(R.string.cancel), new DialogInterface.OnClickListener() {
+			@Override
+			public void onClick(DialogInterface dialog, int which) {
+				if (xmppConnectionService != null) {
+					xmppConnectionService.sendCreateAccountWithCaptchaPacket(account, null, null);
+				}
+			}
+		});
+
+		builder.setOnCancelListener(new DialogInterface.OnCancelListener() {
+			@Override
+			public void onCancel(DialogInterface dialog) {
+				if (xmppConnectionService != null) {
+					xmppConnectionService.sendCreateAccountWithCaptchaPacket(account, null, null);
+				}
+			}
+		});
+
+		runOnUiThread(new Runnable() {
+			@Override
+			public void run() {
+				if ((mCaptchaDialog != null) && mCaptchaDialog.isShowing()) {
+					mCaptchaDialog.dismiss();
+				}
+				mCaptchaDialog = builder.create();
+				mCaptchaDialog.show();
+			}
+		});
+	}
+
+	public void onShowErrorToast(final int resId) {
+		runOnUiThread(new Runnable() {
+			@Override
+			public void run() {
+				Toast.makeText(EditAccountActivity.this, resId, Toast.LENGTH_SHORT).show();
+			}
+		});
+	}
+
+	@Override
+	public void onPreferencesFetched(final Element prefs) {
+		runOnUiThread(new Runnable() {
+			@Override
+			public void run() {
+				if (mFetchingMamPrefsToast != null) {
+					mFetchingMamPrefsToast.cancel();
+				}
+				AlertDialog.Builder builder = new Builder(EditAccountActivity.this);
+				builder.setTitle(R.string.server_side_mam_prefs);
+				String defaultAttr = prefs.getAttribute("default");
+				final List<String> defaults = Arrays.asList("never", "roster", "always");
+				final AtomicInteger choice = new AtomicInteger(Math.max(0,defaults.indexOf(defaultAttr)));
+				builder.setSingleChoiceItems(R.array.mam_prefs, choice.get(), new DialogInterface.OnClickListener() {
+					@Override
+					public void onClick(DialogInterface dialog, int which) {
+						choice.set(which);
+					}
+				});
+				builder.setNegativeButton(R.string.cancel, null);
+				builder.setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
+					@Override
+					public void onClick(DialogInterface dialog, int which) {
+						prefs.setAttribute("default",defaults.get(choice.get()));
+						xmppConnectionService.pushMamPreferences(mAccount, prefs);
+					}
+				});
+				builder.create().show();
+			}
+		});
+	}
+
+	@Override
+	public void onPreferencesFetchFailed() {
+		runOnUiThread(new Runnable() {
+			@Override
+			public void run() {
+				if (mFetchingMamPrefsToast != null) {
+					mFetchingMamPrefsToast.cancel();
+				}
+				Toast.makeText(EditAccountActivity.this,R.string.unable_to_fetch_mam_prefs,Toast.LENGTH_LONG).show();
+			}
+		});
+	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/EditMessage.java b/src/main/java/de/thedevstack/conversationsplus/ui/EditMessage.java
index 5c2e6164..5664434f 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/EditMessage.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/EditMessage.java
@@ -32,21 +32,32 @@ public class EditMessage extends EmojiconEditText {
 
 	private boolean isUserTyping = false;
 
+	private boolean lastInputWasTab = false;
+
 	protected KeyboardListener keyboardListener;
 
 	@Override
-	public boolean onKeyDown(int keyCode, KeyEvent event) {
-		if (keyCode == KeyEvent.KEYCODE_ENTER) {
+	public boolean onKeyDown(int keyCode, KeyEvent e) {
+		if (keyCode == KeyEvent.KEYCODE_ENTER && !e.isShiftPressed()) {
+			lastInputWasTab = false;
 			if (keyboardListener != null && keyboardListener.onEnterPressed()) {
 				return true;
 			}
+		} else if (keyCode == KeyEvent.KEYCODE_TAB && !e.isAltPressed() && !e.isCtrlPressed()) {
+			if (keyboardListener != null && keyboardListener.onTabPressed(this.lastInputWasTab)) {
+				lastInputWasTab = true;
+				return true;
+			}
+		} else {
+			lastInputWasTab = false;
 		}
-		return super.onKeyDown(keyCode, event);
+		return super.onKeyDown(keyCode, e);
 	}
 
 	@Override
 	public void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
 		super.onTextChanged(text,start,lengthBefore,lengthAfter);
+		lastInputWasTab = false;
 		if (this.mTypingHandler != null && this.keyboardListener != null) {
 			this.mTypingHandler.removeCallbacks(mTypingTimeout);
 			this.mTypingHandler.postDelayed(mTypingTimeout, Config.TYPING_TIMEOUT * 1000);
@@ -69,10 +80,11 @@ public class EditMessage extends EmojiconEditText {
 	}
 
 	public interface KeyboardListener {
-		public boolean onEnterPressed();
-		public void onTypingStarted();
-		public void onTypingStopped();
-		public void onTextDeleted();
+		boolean onEnterPressed();
+		void onTypingStarted();
+		void onTypingStopped();
+		void onTextDeleted();
+		boolean onTabPressed(boolean repeated);
 	}
 
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/EnterJidDialog.java b/src/main/java/de/thedevstack/conversationsplus/ui/EnterJidDialog.java
new file mode 100644
index 00000000..9e52d390
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/EnterJidDialog.java
@@ -0,0 +1,134 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.ArrayAdapter;
+import android.widget.AutoCompleteTextView;
+import android.widget.Spinner;
+import android.widget.TextView;
+
+import java.util.List;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.ui.adapter.KnownHostsAdapter;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class EnterJidDialog {
+	public interface OnEnterJidDialogPositiveListener {
+		boolean onEnterJidDialogPositive(Jid account, Jid contact) throws EnterJidDialog.JidError;
+	}
+
+	public static class JidError extends Exception {
+		final String msg;
+
+		public JidError(final String msg) {
+			this.msg = msg;
+		}
+
+		public String toString() {
+			return msg;
+		}
+	}
+
+	protected final AlertDialog dialog;
+	protected View.OnClickListener dialogOnClick;
+	protected OnEnterJidDialogPositiveListener listener = null;
+
+	public EnterJidDialog(
+		final Context context, List<String> knownHosts, final List<String> activatedAccounts,
+		final String title, final String positiveButton,
+		final String prefilledJid, final String account, boolean allowEditJid
+	) {
+		final boolean lock = Config.LOCK_DOMAINS_IN_CONVERSATIONS && Config.DOMAIN_LOCK != null;
+		AlertDialog.Builder builder = new AlertDialog.Builder(context);
+		builder.setTitle(title);
+		View dialogView = LayoutInflater.from(context).inflate(R.layout.enter_jid_dialog, null);
+		final TextView jabberIdDesc = (TextView) dialogView.findViewById(R.id.jabber_id);
+		jabberIdDesc.setText(lock ? R.string.username : R.string.account_settings_jabber_id);
+		final Spinner spinner = (Spinner) dialogView.findViewById(R.id.account);
+		final AutoCompleteTextView jid = (AutoCompleteTextView) dialogView.findViewById(R.id.jid);
+		if (!lock) {
+			jid.setAdapter(new KnownHostsAdapter(context, android.R.layout.simple_list_item_1, knownHosts));
+		}
+		if (prefilledJid != null) {
+			jid.append(prefilledJid);
+			if (!allowEditJid) {
+				jid.setFocusable(false);
+				jid.setFocusableInTouchMode(false);
+				jid.setClickable(false);
+				jid.setCursorVisible(false);
+			}
+		}
+
+		jid.setHint(Config.LOCK_DOMAINS_IN_CONVERSATIONS && Config.DOMAIN_LOCK != null ? R.string.username_hint : R.string.account_settings_example_jabber_id);
+
+		if (account == null) {
+			StartConversationActivity.populateAccountSpinner(context, activatedAccounts, spinner);
+		} else {
+			ArrayAdapter<String> adapter = new ArrayAdapter<>(context,
+				android.R.layout.simple_spinner_item,
+					new String[] { account });
+			spinner.setEnabled(false);
+			adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+			spinner.setAdapter(adapter);
+		}
+
+		builder.setView(dialogView);
+		builder.setNegativeButton(R.string.cancel, null);
+		builder.setPositiveButton(positiveButton, null);
+		this.dialog = builder.create();
+
+		this.dialogOnClick = new View.OnClickListener() {
+			@Override
+			public void onClick(final View v) {
+				final Jid accountJid;
+				if (!spinner.isEnabled() && account == null) {
+					return;
+				}
+				try {
+					if (Config.DOMAIN_LOCK != null) {
+						accountJid = Jid.fromParts((String) spinner.getSelectedItem(), Config.DOMAIN_LOCK, null);
+					} else {
+						accountJid = Jid.fromString((String) spinner.getSelectedItem());
+					}
+				} catch (final InvalidJidException e) {
+					return;
+				}
+				final Jid contactJid;
+				try {
+					if (lock) {
+						contactJid = Jid.fromParts(jid.getText().toString(), Config.DOMAIN_LOCK, null);
+					} else {
+						contactJid = Jid.fromString(jid.getText().toString());
+					}
+				} catch (final InvalidJidException e) {
+					jid.setError(context.getString(lock ? R.string.invalid_username : R.string.invalid_jid));
+					return;
+				}
+
+				if(listener != null) {
+					try {
+						if(listener.onEnterJidDialogPositive(accountJid, contactJid)) {
+							dialog.dismiss();
+						}
+					} catch(JidError error) {
+						jid.setError(error.toString());
+					}
+				}
+			}
+		};
+	}
+
+	public void setOnEnterJidDialogPositiveListener(OnEnterJidDialogPositiveListener listener) {
+		this.listener = listener;
+	}
+
+	public void show() {
+		this.dialog.show();
+		this.dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(this.dialogOnClick);
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/ExportLogsPreference.java b/src/main/java/de/thedevstack/conversationsplus/ui/ExportLogsPreference.java
new file mode 100644
index 00000000..eabb7518
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/ExportLogsPreference.java
@@ -0,0 +1,29 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.content.Context;
+import android.content.Intent;
+import android.preference.Preference;
+import android.util.AttributeSet;
+
+import de.thedevstack.conversationsplus.services.ExportLogsService;
+
+public class ExportLogsPreference extends Preference {
+
+    public ExportLogsPreference(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    public ExportLogsPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public ExportLogsPreference(Context context) {
+        super(context);
+    }
+
+    protected void onClick() {
+		final Intent startIntent = new Intent(getContext(), ExportLogsService.class);
+		getContext().startService(startIntent);
+		super.onClick();
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/ManageAccountActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/ManageAccountActivity.java
index 0820ec8b..431111f5 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/ManageAccountActivity.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/ManageAccountActivity.java
@@ -1,34 +1,54 @@
 package de.thedevstack.conversationsplus.ui;
 
-import java.util.ArrayList;
-import java.util.List;
-
-import de.thedevstack.conversationsplus.R;
-import de.thedevstack.conversationsplus.entities.Account;
-import de.thedevstack.conversationsplus.services.XmppConnectionService.OnAccountUpdate;
-import de.thedevstack.conversationsplus.ui.adapter.AccountAdapter;
+import android.app.ActionBar;
 import android.app.AlertDialog;
+import android.content.ActivityNotFoundException;
 import android.content.DialogInterface;
 import android.content.DialogInterface.OnClickListener;
 import android.content.Intent;
 import android.os.Bundle;
+import android.security.KeyChain;
+import android.security.KeyChainAliasCallback;
+import android.util.Pair;
 import android.view.ContextMenu;
+import android.view.ContextMenu.ContextMenuInfo;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
-import android.view.ContextMenu.ContextMenuInfo;
 import android.widget.AdapterView;
 import android.widget.AdapterView.AdapterContextMenuInfo;
 import android.widget.AdapterView.OnItemClickListener;
 import android.widget.ListView;
+import android.widget.Toast;
+
+import org.openintents.openpgp.util.OpenPgpApi;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.services.XmppConnectionService.OnAccountUpdate;
+import de.thedevstack.conversationsplus.ui.adapter.AccountAdapter;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 
-public class ManageAccountActivity extends XmppActivity implements OnAccountUpdate {
+public class ManageAccountActivity extends XmppActivity implements OnAccountUpdate, KeyChainAliasCallback, XmppConnectionService.OnAccountCreated {
+
+	private final String STATE_SELECTED_ACCOUNT = "selected_account";
 
 	protected Account selectedAccount = null;
+	protected Jid selectedAccountJid = null;
 
 	protected final List<Account> accountList = new ArrayList<>();
 	protected ListView accountListView;
 	protected AccountAdapter mAccountAdapter;
+	protected AtomicBoolean mInvokedAddAccount = new AtomicBoolean(false);
+
+	protected Pair<Integer, Intent> mPostponedActivityResult = null;
 
 	@Override
 	public void onAccountUpdate() {
@@ -41,6 +61,11 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
 			accountList.clear();
 			accountList.addAll(xmppConnectionService.getAccounts());
 		}
+		ActionBar actionBar = getActionBar();
+		if (actionBar != null) {
+			actionBar.setHomeButtonEnabled(this.accountList.size() > 0);
+			actionBar.setDisplayHomeAsUpEnabled(this.accountList.size() > 0);
+		}
 		invalidateOptionsMenu();
 		mAccountAdapter.notifyDataSetChanged();
 	}
@@ -52,6 +77,17 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
 
 		setContentView(R.layout.manage_accounts);
 
+		if (savedInstanceState != null) {
+			String jid = savedInstanceState.getString(STATE_SELECTED_ACCOUNT);
+			if (jid != null) {
+				try {
+					this.selectedAccountJid = Jid.fromString(jid);
+				} catch (InvalidJidException e) {
+					this.selectedAccountJid = null;
+				}
+			}
+		}
+
 		accountListView = (ListView) findViewById(R.id.account_list);
 		this.mAccountAdapter = new AccountAdapter(this, accountList);
 		accountListView.setAdapter(this.mAccountAdapter);
@@ -59,7 +95,7 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
 
 			@Override
 			public void onItemClick(AdapterView<?> arg0, View view,
-					int position, long arg3) {
+									int position, long arg3) {
 				switchToAccount(accountList.get(position));
 			}
 		});
@@ -67,12 +103,19 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
 	}
 
 	@Override
-	public void onCreateContextMenu(ContextMenu menu, View v,
-			ContextMenuInfo menuInfo) {
+	public void onSaveInstanceState(final Bundle savedInstanceState) {
+		if (selectedAccount != null) {
+			savedInstanceState.putString(STATE_SELECTED_ACCOUNT, selectedAccount.getJid().toBareJid().toString());
+		}
+		super.onSaveInstanceState(savedInstanceState);
+	}
+
+	@Override
+	public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
 		super.onCreateContextMenu(menu, v, menuInfo);
 		ManageAccountActivity.this.getMenuInflater().inflate(
 				R.menu.manageaccounts_context, menu);
-		AdapterView.AdapterContextMenuInfo acmi = (AdapterContextMenuInfo) menuInfo;
+		AdapterContextMenuInfo acmi = (AdapterContextMenuInfo) menuInfo;
 		this.selectedAccount = accountList.get(acmi.position);
 		if (this.selectedAccount.isOptionSet(Account.OPTION_DISABLED)) {
 			menu.findItem(R.id.mgmt_account_disable).setVisible(false);
@@ -80,21 +123,42 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
 			menu.findItem(R.id.mgmt_account_publish_avatar).setVisible(false);
 		} else {
 			menu.findItem(R.id.mgmt_account_enable).setVisible(false);
+			menu.findItem(R.id.mgmt_account_announce_pgp).setVisible(Config.supportOpenPgp());
 		}
 		menu.setHeaderTitle(this.selectedAccount.getJid().toBareJid().toString());
 	}
 
 	@Override
 	void onBackendConnected() {
-		this.accountList.clear();
-		this.accountList.addAll(xmppConnectionService.getAccounts());
-		mAccountAdapter.notifyDataSetChanged();
+		if (selectedAccountJid != null) {
+			this.selectedAccount = xmppConnectionService.findAccountByJid(selectedAccountJid);
+		}
+		refreshUiReal();
+		if (this.mPostponedActivityResult != null) {
+			this.onActivityResult(mPostponedActivityResult.first, RESULT_OK, mPostponedActivityResult.second);
+		}
+		if (Config.X509_VERIFICATION && this.accountList.size() == 0) {
+			if (mInvokedAddAccount.compareAndSet(false, true)) {
+				addAccountFromKey();
+			}
+		}
 	}
 
 	@Override
 	public boolean onCreateOptionsMenu(Menu menu) {
 		getMenuInflater().inflate(R.menu.manageaccounts, menu);
 		MenuItem enableAll = menu.findItem(R.id.action_enable_all);
+		MenuItem addAccount = menu.findItem(R.id.action_add_account);
+		MenuItem addAccountWithCertificate = menu.findItem(R.id.action_add_account_with_cert);
+
+		if (Config.X509_VERIFICATION) {
+			addAccount.setVisible(false);
+			addAccountWithCertificate.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
+		} else {
+			addAccount.setVisible(!Config.SINGLE_ACCOUNT);
+		}
+		addAccountWithCertificate.setVisible(!Config.SINGLE_ACCOUNT);
+
 		if (!accountsLeftToEnable()) {
 			enableAll.setVisible(false);
 		}
@@ -108,23 +172,23 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
 	@Override
 	public boolean onContextItemSelected(MenuItem item) {
 		switch (item.getItemId()) {
-		case R.id.mgmt_account_publish_avatar:
-			publishAvatar(selectedAccount);
-			return true;
-		case R.id.mgmt_account_disable:
-			disableAccount(selectedAccount);
-			return true;
-		case R.id.mgmt_account_enable:
-			enableAccount(selectedAccount);
-			return true;
-		case R.id.mgmt_account_delete:
-			deleteAccount(selectedAccount);
-			return true;
-		case R.id.mgmt_account_announce_pgp:
-			publishOpenPGPPublicKey(selectedAccount);
-			return true;
-		default:
-			return super.onContextItemSelected(item);
+			case R.id.mgmt_account_publish_avatar:
+				publishAvatar(selectedAccount);
+				return true;
+			case R.id.mgmt_account_disable:
+				disableAccount(selectedAccount);
+				return true;
+			case R.id.mgmt_account_enable:
+				enableAccount(selectedAccount);
+				return true;
+			case R.id.mgmt_account_delete:
+				deleteAccount(selectedAccount);
+				return true;
+			case R.id.mgmt_account_announce_pgp:
+				publishOpenPGPPublicKey(selectedAccount);
+				return true;
+			default:
+				return super.onContextItemSelected(item);
 		}
 	}
 
@@ -141,6 +205,9 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
 			case R.id.action_enable_all:
 				enableAllAccounts();
 				break;
+			case R.id.action_add_account_with_cert:
+				addAccountFromKey();
+				break;
 			default:
 				break;
 		}
@@ -153,9 +220,9 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
 			Intent contactsIntent = new Intent(this,
 					StartConversationActivity.class);
 			contactsIntent.setFlags(
-			// if activity exists in stack, pop the stack and go back to it
+					// if activity exists in stack, pop the stack and go back to it
 					Intent.FLAG_ACTIVITY_CLEAR_TOP |
-					// otherwise, make a new task for it
+							// otherwise, make a new task for it
 							Intent.FLAG_ACTIVITY_NEW_TASK |
 							// don't use the new activity animation; finish
 							// animation runs instead
@@ -176,10 +243,18 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
 		}
 	}
 
+	private void addAccountFromKey() {
+		try {
+			KeyChain.choosePrivateKeyAlias(this, this, null, null, null, -1, null);
+		} catch (ActivityNotFoundException e) {
+			Toast.makeText(this, R.string.device_does_not_support_certificates, Toast.LENGTH_LONG).show();
+		}
+	}
+
 	private void publishAvatar(Account account) {
 		Intent intent = new Intent(getApplicationContext(),
 				PublishProfilePictureActivity.class);
-		intent.putExtra("account", account.getJid().toString());
+		intent.putExtra(EXTRA_ACCOUNT, account.getJid().toString());
 		startActivity(intent);
 	}
 
@@ -192,7 +267,7 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
 				}
 			}
 		}
-		for(Account account : list) {
+		for (Account account : list) {
 			disableAccount(account);
 		}
 	}
@@ -228,7 +303,7 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
 				}
 			}
 		}
-		for(Account account : list) {
+		for (Account account : list) {
 			enableAccount(account);
 		}
 	}
@@ -245,7 +320,7 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
 
 	private void publishOpenPGPPublicKey(Account account) {
 		if (ManageAccountActivity.this.hasPgp()) {
-			announcePgp(account, null);
+			choosePgpSignId(selectedAccount);
 		} else {
 			this.showInstallPgpDialog();
 		}
@@ -273,9 +348,43 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
 	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 		super.onActivityResult(requestCode, resultCode, data);
 		if (resultCode == RESULT_OK) {
-			if (requestCode == REQUEST_ANNOUNCE_PGP) {
-				announcePgp(selectedAccount, null);
+			if (xmppConnectionServiceBound) {
+				if (requestCode == REQUEST_CHOOSE_PGP_ID) {
+					if (data.getExtras().containsKey(OpenPgpApi.EXTRA_SIGN_KEY_ID)) {
+						selectedAccount.setPgpSignId(data.getExtras().getLong(OpenPgpApi.EXTRA_SIGN_KEY_ID));
+						announcePgp(selectedAccount, null);
+					} else {
+						choosePgpSignId(selectedAccount);
+					}
+				} else if (requestCode == REQUEST_ANNOUNCE_PGP) {
+					announcePgp(selectedAccount, null);
+				}
+				this.mPostponedActivityResult = null;
+			} else {
+				this.mPostponedActivityResult = new Pair<>(requestCode, data);
 			}
 		}
 	}
+
+	@Override
+	public void alias(String alias) {
+		if (alias != null) {
+			xmppConnectionService.createAccountFromKey(alias, this);
+		}
+	}
+
+	@Override
+	public void onAccountCreated(Account account) {
+		switchToAccount(account, true);
+	}
+
+	@Override
+	public void informUser(final int r) {
+		runOnUiThread(new Runnable() {
+			@Override
+			public void run() {
+				Toast.makeText(ManageAccountActivity.this, r, Toast.LENGTH_LONG).show();
+			}
+		});
+	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/PublishProfilePictureActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/PublishProfilePictureActivity.java
index 2045f001..9b827861 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/PublishProfilePictureActivity.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/PublishProfilePictureActivity.java
@@ -2,7 +2,9 @@ package de.thedevstack.conversationsplus.ui;
 
 import android.app.PendingIntent;
 import android.content.Intent;
+import android.content.pm.PackageManager;
 import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
 import android.net.Uri;
 import android.os.Bundle;
 import android.view.View;
@@ -13,28 +15,34 @@ import android.widget.ImageView;
 import android.widget.TextView;
 import android.widget.Toast;
 
+import com.soundcloud.android.crop.Crop;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+
+import de.thedevstack.conversationsplus.utils.ImageUtil;
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.R;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.services.AvatarService;
-import de.thedevstack.conversationsplus.utils.ImageUtil;
+import de.thedevstack.conversationsplus.utils.ExifHelper;
+import de.thedevstack.conversationsplus.utils.FileUtils;
 import de.thedevstack.conversationsplus.utils.PhoneHelper;
-import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
-import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 import de.thedevstack.conversationsplus.xmpp.pep.Avatar;
 
 public class PublishProfilePictureActivity extends XmppActivity {
 
 	private static final int REQUEST_CHOOSE_FILE = 0xac23;
-
 	private ImageView avatar;
 	private TextView accountTextView;
 	private TextView hintOrWarning;
 	private TextView secondaryHint;
 	private Button cancelButton;
 	private Button publishButton;
-
 	private Uri avatarUri;
 	private Uri defaultUri;
+	private Account account;
+	private boolean support = false;
 	private OnLongClickListener backToDefaultListener = new OnLongClickListener() {
 
 		@Override
@@ -44,8 +52,6 @@ public class PublishProfilePictureActivity extends XmppActivity {
 			return true;
 		}
 	};
-	private Account account;
-	private boolean support = false;
 	private boolean mInitialAccountSetup;
 	private UiCallback<Avatar> avatarPublication = new UiCallback<Avatar>() {
 
@@ -58,7 +64,7 @@ public class PublishProfilePictureActivity extends XmppActivity {
 					if (mInitialAccountSetup) {
 						Intent intent = new Intent(getApplicationContext(),
 								StartConversationActivity.class);
-						intent.putExtra("init",true);
+						intent.putExtra("init", true);
 						startActivity(intent);
 					}
 					Toast.makeText(PublishProfilePictureActivity.this,
@@ -130,26 +136,60 @@ public class PublishProfilePictureActivity extends XmppActivity {
 
 			@Override
 			public void onClick(View v) {
-				Intent attachFileIntent = new Intent();
-				attachFileIntent.setType("image/*");
-				attachFileIntent.setAction(Intent.ACTION_GET_CONTENT);
-				Intent chooser = Intent.createChooser(attachFileIntent,
-						getString(R.string.attach_file));
-				startActivityForResult(chooser, REQUEST_CHOOSE_FILE);
+				if (hasStoragePermission(REQUEST_CHOOSE_FILE)) {
+					chooseAvatar();
+				}
+
 			}
 		});
 		this.defaultUri = PhoneHelper.getSefliUri(getApplicationContext());
 	}
 
+	private void chooseAvatar() {
+		Intent attachFileIntent = new Intent();
+		attachFileIntent.setType("image/*");
+		attachFileIntent.setAction(Intent.ACTION_GET_CONTENT);
+		Intent chooser = Intent.createChooser(attachFileIntent, getString(R.string.attach_file));
+		startActivityForResult(chooser, REQUEST_CHOOSE_FILE);
+	}
+
+	@Override
+	public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
+		if (grantResults.length > 0)
+			if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+				if (requestCode == REQUEST_CHOOSE_FILE) {
+					chooseAvatar();
+				}
+			} else {
+				Toast.makeText(this, R.string.no_storage_permission, Toast.LENGTH_SHORT).show();
+			}
+	}
+
 	@Override
-	protected void onActivityResult(int requestCode, int resultCode,
-			final Intent data) {
+	protected void onActivityResult(int requestCode, int resultCode, final Intent data) {
 		super.onActivityResult(requestCode, resultCode, data);
 		if (resultCode == RESULT_OK) {
-			if (requestCode == REQUEST_CHOOSE_FILE) {
-				this.avatarUri = data.getData();
-				if (xmppConnectionServiceBound) {
+			switch (requestCode) {
+				case REQUEST_CHOOSE_FILE:
+					Uri source = data.getData();
+					String original = FileUtils.getPath(this, source);
+					if (original != null) {
+						source = Uri.parse("file://"+original);
+					}
+					Uri destination = Uri.fromFile(new File(getCacheDir(), "croppedAvatar"));
+					final int size = getPixel(192);
+					Crop.of(source, destination).asSquare().withMaxSize(size, size).start(this);
+					break;
+				case Crop.REQUEST_CROP:
+					this.avatarUri = Uri.fromFile(new File(getCacheDir(), "croppedAvatar"));
 					loadImageIntoPreview(this.avatarUri);
+					break;
+			}
+		} else {
+			if (requestCode == Crop.REQUEST_CROP  && data != null) {
+				Throwable throwable = Crop.getError(data);
+				if (throwable != null && throwable instanceof OutOfMemoryError) {
+					Toast.makeText(this,R.string.selection_too_large, Toast.LENGTH_SHORT).show();
 				}
 			}
 		}
@@ -157,63 +197,75 @@ public class PublishProfilePictureActivity extends XmppActivity {
 
 	@Override
 	protected void onBackendConnected() {
-		if (getIntent() != null) {
-            Jid jid;
-            try {
-                jid = Jid.fromString(getIntent().getStringExtra("account"));
-            } catch (InvalidJidException e) {
-                jid = null;
-            }
-            if (jid != null) {
-				this.account = xmppConnectionService.findAccountByJid(jid);
-				if (this.account.getXmppConnection() != null) {
-					this.support = this.account.getXmppConnection().getFeatures().pep();
-				}
-				if (this.avatarUri == null) {
-					if (this.account.getAvatar() != null
-							|| this.defaultUri == null) {
-						this.avatar.setImageBitmap(AvatarService.getInstance().get(account,
-								getPixel(194)));
-						if (this.defaultUri != null) {
-							this.avatar
-									.setOnLongClickListener(this.backToDefaultListener);
-						} else {
-							this.secondaryHint.setVisibility(View.INVISIBLE);
-						}
-						if (!support) {
-							this.hintOrWarning
-									.setTextColor(getWarningTextColor());
-							this.hintOrWarning
-									.setText(R.string.error_publish_avatar_no_server_support);
-						}
+		this.account = extractAccount(getIntent());
+		if (this.account != null) {
+			if (this.account.getXmppConnection() != null) {
+				this.support = this.account.getXmppConnection().getFeatures().pep();
+			}
+			if (this.avatarUri == null) {
+				if (this.account.getAvatar() != null
+						|| this.defaultUri == null) {
+					this.avatar.setImageBitmap(AvatarService.getInstance().get(account, getPixel(192)));
+					if (this.defaultUri != null) {
+						this.avatar
+								.setOnLongClickListener(this.backToDefaultListener);
 					} else {
-						this.avatarUri = this.defaultUri;
-						loadImageIntoPreview(this.defaultUri);
 						this.secondaryHint.setVisibility(View.INVISIBLE);
 					}
+					if (!support) {
+						this.hintOrWarning
+								.setTextColor(getWarningTextColor());
+						this.hintOrWarning
+								.setText(R.string.error_publish_avatar_no_server_support);
+					}
 				} else {
-					loadImageIntoPreview(avatarUri);
+					this.avatarUri = this.defaultUri;
+					loadImageIntoPreview(this.defaultUri);
+					this.secondaryHint.setVisibility(View.INVISIBLE);
 				}
-				this.accountTextView.setText(this.account.getJid().toBareJid().toString());
+			} else {
+				loadImageIntoPreview(avatarUri);
+			}
+			String account;
+			if (Config.DOMAIN_LOCK != null) {
+				account = this.account.getJid().getLocalpart();
+			} else {
+				account = this.account.getJid().toBareJid().toString();
 			}
+			this.accountTextView.setText(account);
 		}
-
 	}
 
 	@Override
 	protected void onStart() {
 		super.onStart();
 		if (getIntent() != null) {
-			this.mInitialAccountSetup = getIntent().getBooleanExtra("setup",
-					false);
+			this.mInitialAccountSetup = getIntent().getBooleanExtra("setup", false);
 		}
 		if (this.mInitialAccountSetup) {
 			this.cancelButton.setText(R.string.skip);
 		}
 	}
 
+	private Bitmap loadScaledBitmap(Uri uri, int reqSize) throws FileNotFoundException {
+		final BitmapFactory.Options options = new BitmapFactory.Options();
+		options.inJustDecodeBounds = true;
+		BitmapFactory.decodeStream(getContentResolver().openInputStream(uri), null, options);
+		int rotation = ExifHelper.getOrientation(getContentResolver().openInputStream(uri));
+		options.inSampleSize = ImageUtil.calcSampleSize(options, reqSize);
+		options.inJustDecodeBounds = false;
+		Bitmap bm = BitmapFactory.decodeStream(getContentResolver().openInputStream(uri), null, options);
+		return ImageUtil.rotate(bm,rotation);
+	}
+
 	protected void loadImageIntoPreview(Uri uri) {
-		Bitmap bm = ImageUtil.cropCenterSquare(uri, 384);
+		Bitmap bm = null;
+		try {
+			bm = loadScaledBitmap(uri, getPixel(192));
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+
 		if (bm == null) {
 			disablePublishButton();
 			this.hintOrWarning.setTextColor(getWarningTextColor());
@@ -252,4 +304,7 @@ public class PublishProfilePictureActivity extends XmppActivity {
 		this.publishButton.setTextColor(getSecondaryTextColor());
 	}
 
+	public void refreshUiReal() {
+		//nothing to do. This Activity doesn't implement any listeners
+	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/SettingsActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/SettingsActivity.java
index c364ff00..e8c9587b 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/SettingsActivity.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/SettingsActivity.java
@@ -1,20 +1,5 @@
 package de.thedevstack.conversationsplus.ui;
 
-import java.security.KeyStoreException;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.Locale;
-
-import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
-import de.tzur.conversations.Settings;
-import de.duenndns.ssl.MemorizingTrustManager;
-
-import de.thedevstack.conversationsplus.R;
-import de.thedevstack.conversationsplus.entities.Account;
-import de.thedevstack.conversationsplus.xmpp.XmppConnection;
-import github.ankushsachdeva.emojicon.EmojiconHandler;
-
 import android.app.AlertDialog;
 import android.app.FragmentManager;
 import android.content.DialogInterface;
@@ -24,9 +9,23 @@ import android.os.Build;
 import android.os.Bundle;
 import android.preference.ListPreference;
 import android.preference.Preference;
+import android.preference.PreferenceCategory;
 import android.preference.PreferenceManager;
 import android.widget.Toast;
 
+import java.security.KeyStoreException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Locale;
+
+import de.duenndns.ssl.MemorizingTrustManager;
+import de.tzur.conversations.Settings;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.xmpp.XmppConnection;
+import github.ankushsachdeva.emojicon.EmojiconHandler;
+
 public class SettingsActivity extends XmppActivity implements
 		OnSharedPreferenceChangeListener {
 	private SettingsFragment mSettingsFragment;
@@ -63,65 +62,71 @@ public class SettingsActivity extends XmppActivity implements
 
 		final Preference removeCertsPreference = mSettingsFragment.findPreference("remove_trusted_certificates");
 		removeCertsPreference.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
-			@Override
-			public boolean onPreferenceClick(Preference preference) {
-				final MemorizingTrustManager mtm = xmppConnectionService.getMemorizingTrustManager();
-				final ArrayList<String> aliases = Collections.list(mtm.getCertificates());
-				if (aliases.size() == 0) {
-					displayToast(getString(R.string.toast_no_trusted_certs));
-					return true;
-				}
-				final ArrayList selectedItems = new ArrayList<Integer>();
-				final AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(SettingsActivity.this);
-				dialogBuilder.setTitle(getResources().getString(R.string.dialog_manage_certs_title));
-				dialogBuilder.setMultiChoiceItems(aliases.toArray(new CharSequence[aliases.size()]), null,
-						new DialogInterface.OnMultiChoiceClickListener() {
-							@Override
-							public void onClick(DialogInterface dialog, int indexSelected,
-												boolean isChecked) {
-								if (isChecked) {
-									selectedItems.add(indexSelected);
-								} else if (selectedItems.contains(indexSelected)) {
-									selectedItems.remove(Integer.valueOf(indexSelected));
-								}
-								if (selectedItems.size() > 0)
-									((AlertDialog) dialog).getButton(DialogInterface.BUTTON_POSITIVE).setEnabled(true);
-								else {
-									((AlertDialog) dialog).getButton(DialogInterface.BUTTON_POSITIVE).setEnabled(false);
-								}
-							}
-						});
-
-				dialogBuilder.setPositiveButton(
-						getResources().getString(R.string.dialog_manage_certs_positivebutton), new DialogInterface.OnClickListener() {
-							@Override
-							public void onClick(DialogInterface dialog, int which) {
-								int count = selectedItems.size();
-								if (count > 0) {
-									for (int i = 0; i < count; i++) {
-										try {
-											Integer item = Integer.valueOf(selectedItems.get(i).toString());
-											String alias = aliases.get(item);
-											mtm.deleteCertificate(alias);
-										} catch (KeyStoreException e) {
-											e.printStackTrace();
-											displayToast("Error: " + e.getLocalizedMessage());
-										}
-									}
-									if (xmppConnectionServiceBound) {
-										reconnectAccounts();
-									}
-									displayToast(getResources().getQuantityString(R.plurals.toast_delete_certificates, count, count));
-								}
-							}
-						});
-				dialogBuilder.setNegativeButton(getResources().getString(R.string.dialog_manage_certs_negativebutton), null);
-				AlertDialog removeCertsDialog = dialogBuilder.create();
-				removeCertsDialog.show();
-				removeCertsDialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(false);
-				return true;
-			}
-		});
+            @Override
+            public boolean onPreferenceClick(Preference preference) {
+                final MemorizingTrustManager mtm = xmppConnectionService.getMemorizingTrustManager();
+                final ArrayList<String> aliases = Collections.list(mtm.getCertificates());
+                if (aliases.size() == 0) {
+                    displayToast(getString(R.string.toast_no_trusted_certs));
+                    return true;
+                }
+                final ArrayList selectedItems = new ArrayList<Integer>();
+                final AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(SettingsActivity.this);
+                dialogBuilder.setTitle(getResources().getString(R.string.dialog_manage_certs_title));
+                dialogBuilder.setMultiChoiceItems(aliases.toArray(new CharSequence[aliases.size()]), null,
+                        new DialogInterface.OnMultiChoiceClickListener() {
+                            @Override
+                            public void onClick(DialogInterface dialog, int indexSelected,
+                                                boolean isChecked) {
+                                if (isChecked) {
+                                    selectedItems.add(indexSelected);
+                                } else if (selectedItems.contains(indexSelected)) {
+                                    selectedItems.remove(Integer.valueOf(indexSelected));
+                                }
+                                if (selectedItems.size() > 0)
+                                    ((AlertDialog) dialog).getButton(DialogInterface.BUTTON_POSITIVE).setEnabled(true);
+                                else {
+                                    ((AlertDialog) dialog).getButton(DialogInterface.BUTTON_POSITIVE).setEnabled(false);
+                                }
+                            }
+                        });
+
+                dialogBuilder.setPositiveButton(
+                        getResources().getString(R.string.dialog_manage_certs_positivebutton), new DialogInterface.OnClickListener() {
+                            @Override
+                            public void onClick(DialogInterface dialog, int which) {
+                                int count = selectedItems.size();
+                                if (count > 0) {
+                                    for (int i = 0; i < count; i++) {
+                                        try {
+                                            Integer item = Integer.valueOf(selectedItems.get(i).toString());
+                                            String alias = aliases.get(item);
+                                            mtm.deleteCertificate(alias);
+                                        } catch (KeyStoreException e) {
+                                            e.printStackTrace();
+                                            displayToast("Error: " + e.getLocalizedMessage());
+                                        }
+                                    }
+                                    if (xmppConnectionServiceBound) {
+                                        reconnectAccounts();
+                                    }
+                                    displayToast(getResources().getQuantityString(R.plurals.toast_delete_certificates, count, count));
+                                }
+                            }
+                        });
+                dialogBuilder.setNegativeButton(getResources().getString(R.string.dialog_manage_certs_negativebutton), null);
+                AlertDialog removeCertsDialog = dialogBuilder.create();
+                removeCertsDialog.show();
+                removeCertsDialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(false);
+                return true;
+            }
+        });
+        // Avoid appearence of setting to enable or disable omemo in screen
+        Preference omemoEnabledPreference = this.mSettingsFragment.findPreference("omemo_enabled");
+        PreferenceCategory otherExpertSettingsGroup = (PreferenceCategory) this.mSettingsFragment.findPreference("other_expert_settings");
+        if (null != omemoEnabledPreference && null != otherExpertSettingsGroup) {
+            otherExpertSettingsGroup.removePreference(omemoEnabledPreference);
+        }
 	}
 
 	@Override
@@ -136,42 +141,40 @@ public class SettingsActivity extends XmppActivity implements
 			String name) {
         // need to synchronize the settings class first
         Settings.synchronizeSettingsClassWithPreferences(preferences, name);
-        switch (name) {
-            case "resource":
-                String resource = ConversationsPlusPreferences.resource().toLowerCase(Locale.US);
-                if (xmppConnectionServiceBound) {
-                    for (Account account : xmppConnectionService.getAccounts()) {
-                        account.setResource(resource);
-                        if (!account.isOptionSet(Account.OPTION_DISABLED)) {
+		if (name.equals("resource")) {
+			String resource = preferences.getString("resource", "mobile")
+					.toLowerCase(Locale.US);
+			if (xmppConnectionServiceBound) {
+				for (Account account : xmppConnectionService.getAccounts()) {
+					if (account.setResource(resource)) {
+						if (!account.isOptionSet(Account.OPTION_DISABLED)) {
 							XmppConnection connection = account.getXmppConnection();
 							if (connection != null) {
 								connection.resetStreamId();
 							}
-                            xmppConnectionService.reconnectAccountInBackground(account);
-                        }
-                    }
-                }
-                break;
-            case "keep_foreground_service":
-                xmppConnectionService.toggleForegroundService();
-                break;
-			case "confirm_messages":
-				if (xmppConnectionServiceBound) {
-					for (Account account : xmppConnectionService.getAccounts()) {
-						if (!account.isOptionSet(Account.OPTION_DISABLED)) {
-							xmppConnectionService.sendPresence(account);
+							xmppConnectionService.reconnectAccountInBackground(account);
 						}
 					}
 				}
-				break;
-			case "dont_trust_system_cas":
-				xmppConnectionService.updateMemorizingTrustmanager();
-				reconnectAccounts();
-				break;
-			case "parse_emoticons":
-				EmojiconHandler.setParseEmoticons(Settings.PARSE_EMOTICONS);
-				break;
-		}
+			}
+		} else if (name.equals("keep_foreground_service")) {
+			xmppConnectionService.toggleForegroundService();
+		} else if (name.equals("confirm_messages_list")
+				|| name.equals("xa_on_silent_mode")
+				|| name.equals("away_when_screen_off")) {
+			if (xmppConnectionServiceBound) {
+				if (name.equals("away_when_screen_off")) {
+					xmppConnectionService.toggleScreenEventReceiver();
+				}
+				xmppConnectionService.refreshAllPresences();
+			}
+		} else if (name.equals("dont_trust_system_cas")) {
+			xmppConnectionService.updateMemorizingTrustmanager();
+			reconnectAccounts();
+		} else if ("parse_emoticons".equals(name)) {
+            EmojiconHandler.setParseEmoticons(Settings.PARSE_EMOTICONS);
+        }
+
 	}
 
 	private void displayToast(final String msg) {
@@ -191,4 +194,8 @@ public class SettingsActivity extends XmppActivity implements
 		}
 	}
 
+	public void refreshUiReal() {
+		//nothing to do. This Activity doesn't implement any listeners
+	}
+
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/ShareWithActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/ShareWithActivity.java
index e73b7cbe..b0ee32f1 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/ShareWithActivity.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/ShareWithActivity.java
@@ -4,6 +4,7 @@ import android.app.PendingIntent;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
+import android.util.Log;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
@@ -17,25 +18,27 @@ import java.util.ArrayList;
 import java.util.List;
 
 import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
+import de.thedevstack.conversationsplus.ui.dialogs.UserDecisionDialog;
+import de.thedevstack.conversationsplus.ui.listeners.ResizePictureUserDecisionListener;
+import de.thedevstack.conversationsplus.ui.listeners.ShareWithResizePictureUserDecisionListener;
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.R;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Conversation;
 import de.thedevstack.conversationsplus.entities.Message;
 import de.thedevstack.conversationsplus.ui.adapter.ConversationAdapter;
-import de.thedevstack.conversationsplus.ui.dialogs.UserDecisionDialog;
-import de.thedevstack.conversationsplus.ui.listeners.ResizePictureUserDecisionListener;
-import de.thedevstack.conversationsplus.ui.listeners.ShareWithResizePictureUserDecisionListener;
 import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 
 public class ShareWithActivity extends XmppActivity {
 
-	public class Share {
+	private class Share {
 		public List<Uri> uris = new ArrayList<>();
 		public boolean image;
 		public String account;
 		public String contact;
 		public String text;
+		public String uuid;
 	}
 
 	private Share share;
@@ -43,6 +46,7 @@ public class ShareWithActivity extends XmppActivity {
 	private static final int REQUEST_START_NEW_CONVERSATION = 0x0501;
 	private ListView mListView;
 	private List<Conversation> mConversations = new ArrayList<>();
+	private Toast mToast;
 
 	private UiCallback<Message> attachFileCallback = new UiCallback<Message>() {
 
@@ -53,8 +57,22 @@ public class ShareWithActivity extends XmppActivity {
 		}
 
 		@Override
-		public void success(Message message) {
+		public void success(final Message message) {
 			xmppConnectionService.sendMessage(message);
+			runOnUiThread(new Runnable() {
+				@Override
+				public void run() {
+					if (mToast != null) {
+						mToast.cancel();
+					}
+					if (share.uuid != null) {
+						mToast = Toast.makeText(getApplicationContext(),
+								getString(share.image ? R.string.shared_image_with_x : R.string.shared_file_with_x,message.getConversation().getName()),
+								Toast.LENGTH_SHORT);
+						mToast.show();
+					}
+				}
+			});
 		}
 
 		@Override
@@ -69,7 +87,7 @@ public class ShareWithActivity extends XmppActivity {
 		if (requestCode == REQUEST_START_NEW_CONVERSATION
 				&& resultCode == RESULT_OK) {
 			share.contact = data.getStringExtra("contact");
-			share.account = data.getStringExtra("account");
+			share.account = data.getStringExtra(EXTRA_ACCOUNT);
 		}
 		if (xmppConnectionServiceBound
 				&& share != null
@@ -131,9 +149,12 @@ public class ShareWithActivity extends XmppActivity {
 			return;
 		}
 		final String type = intent.getType();
+		Log.d(Config.LOGTAG, "action: "+intent.getAction()+ ", type:"+type);
+		share.uuid = intent.getStringExtra("uuid");
 		if (Intent.ACTION_SEND.equals(intent.getAction())) {
 			final Uri uri = getIntent().getParcelableExtra(Intent.EXTRA_STREAM);
 			if (type != null && uri != null && !type.equalsIgnoreCase("text/plain")) {
+				this.share.uris.clear();
 				this.share.uris.add(uri);
 				this.share.image = type.startsWith("image/") || isImage(uri);
 			} else {
@@ -148,7 +169,11 @@ public class ShareWithActivity extends XmppActivity {
 			this.share.uris = intent.getParcelableArrayListExtra(Intent.EXTRA_STREAM);
 		}
 		if (xmppConnectionServiceBound) {
-			xmppConnectionService.populateWithOrderedConversations(mConversations, this.share.uris.size() == 0);
+			if (share.uuid != null) {
+				share();
+			} else {
+				xmppConnectionService.populateWithOrderedConversations(mConversations, this.share.uris.size() == 0);
+			}
 		}
 
 	}
@@ -165,7 +190,7 @@ public class ShareWithActivity extends XmppActivity {
 	@Override
 	void onBackendConnected() {
 		if (xmppConnectionServiceBound && share != null
-				&& share.contact != null && share.account != null) {
+				&& ((share.contact != null && share.account != null) || share.uuid != null)) {
 			share();
 			return;
 		}
@@ -174,26 +199,43 @@ public class ShareWithActivity extends XmppActivity {
 	}
 
 	private void share() {
-		Account account;
-		try {
-			account = xmppConnectionService.findAccountByJid(Jid.fromString(share.account));
-		} catch (final InvalidJidException e) {
-			account = null;
-		}
-		if (account == null) {
-			return;
-		}
 		final Conversation conversation;
-		try {
-			conversation = xmppConnectionService
-					.findOrCreateConversation(account, Jid.fromString(share.contact), false);
-		} catch (final InvalidJidException e) {
-			return;
+		if (share.uuid != null) {
+			conversation = xmppConnectionService.findConversationByUuid(share.uuid);
+			if (conversation == null) {
+				return;
+			}
+		}else{
+			Account account;
+			try {
+				account = xmppConnectionService.findAccountByJid(Jid.fromString(share.account));
+			} catch (final InvalidJidException e) {
+				account = null;
+			}
+			if (account == null) {
+				return;
+			}
+
+			try {
+				conversation = xmppConnectionService
+						.findOrCreateConversation(account, Jid.fromString(share.contact), false);
+			} catch (final InvalidJidException e) {
+				return;
+			}
 		}
 		share(conversation);
 	}
 
 	private void share(final Conversation conversation) {
+		if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP && !hasPgp()) {
+			if (share.uuid == null) {
+				showInstallPgpDialog();
+			} else {
+				Toast.makeText(this,R.string.openkeychain_not_installed,Toast.LENGTH_SHORT).show();
+				finish();
+			}
+			return;
+		}
 		if (share.uris.size() != 0) {
 			OnPresenceSelected callback;
             if (this.share.image) {
@@ -209,22 +251,25 @@ public class ShareWithActivity extends XmppActivity {
                 callback = new OnPresenceSelected() {
                     @Override
                     public void onPresenceSelected() {
-                        Toast.makeText(getApplicationContext(),
+                        mToast = Toast.makeText(getApplicationContext(),
                                 getText(R.string.preparing_file),
-                                Toast.LENGTH_LONG).show();
+                                Toast.LENGTH_LONG);
+                        mToast.show();
                         ShareWithActivity.this.xmppConnectionService
                                 .attachFileToConversation(conversation, share.uris.get(0),
                                         attachFileCallback);
-                        switchToConversation(conversation, null, true);
+					if (share.uuid == null) {
+						switchToConversation(conversation, null, true);
+					}
                         finish();
                     }
                 };
             }
 
 			if (conversation.getAccount().httpUploadAvailable()) {
-                callback.onPresenceSelected();
+				callback.onPresenceSelected();
 			} else {
-                selectPresence(conversation, callback);
+				selectPresence(conversation, callback);
 			}
 		} else {
 			switchToConversation(conversation, this.share.text, true);
@@ -233,4 +278,8 @@ public class ShareWithActivity extends XmppActivity {
 
 	}
 
+	public void refreshUiReal() {
+		//nothing to do. This Activity doesn't implement any listeners
+	}
+
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/StartConversationActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/StartConversationActivity.java
index 8ad23e6e..f8c624be 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/StartConversationActivity.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/StartConversationActivity.java
@@ -1,5 +1,6 @@
 package de.thedevstack.conversationsplus.ui;
 
+import android.Manifest;
 import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.app.ActionBar;
@@ -13,6 +14,7 @@ import android.content.Context;
 import android.content.DialogInterface;
 import android.content.DialogInterface.OnClickListener;
 import android.content.Intent;
+import android.content.pm.PackageManager;
 import android.net.Uri;
 import android.nfc.NdefMessage;
 import android.nfc.NdefRecord;
@@ -41,6 +43,7 @@ import android.widget.Checkable;
 import android.widget.EditText;
 import android.widget.ListView;
 import android.widget.Spinner;
+import android.widget.TextView;
 import android.widget.Toast;
 
 import com.google.zxing.integration.android.IntentIntegrator;
@@ -50,10 +53,11 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
+import java.util.concurrent.atomic.AtomicBoolean;
 
 import de.thedevstack.android.logcat.Logging;
-import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.R;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Blockable;
@@ -61,13 +65,13 @@ import de.thedevstack.conversationsplus.entities.Bookmark;
 import de.thedevstack.conversationsplus.entities.Contact;
 import de.thedevstack.conversationsplus.entities.Conversation;
 import de.thedevstack.conversationsplus.entities.ListItem;
-import de.thedevstack.conversationsplus.entities.Presences;
+import de.thedevstack.conversationsplus.entities.Presence;
 import de.thedevstack.conversationsplus.services.XmppConnectionService.OnRosterUpdate;
 import de.thedevstack.conversationsplus.ui.adapter.KnownHostsAdapter;
 import de.thedevstack.conversationsplus.ui.adapter.ListItemAdapter;
 import de.thedevstack.conversationsplus.utils.XmppUri;
-import de.thedevstack.conversationsplus.xmpp.XmppConnection;
 import de.thedevstack.conversationsplus.xmpp.OnUpdateBlocklist;
+import de.thedevstack.conversationsplus.xmpp.XmppConnection;
 import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 
@@ -90,6 +94,9 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 	private Invite mPendingInvite = null;
 	private Menu mOptionsMenu;
 	private EditText mSearchEditText;
+	private AtomicBoolean mRequestedContactsPermission = new AtomicBoolean(false);
+	private final int REQUEST_SYNC_CONTACTS = 0x3b28cf;
+
 	private MenuItem.OnActionExpandListener mOnActionExpandListener = new MenuItem.OnActionExpandListener() {
 
 		@Override
@@ -246,6 +253,12 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 
 	}
 
+	@Override
+	public void onStart() {
+		super.onStart();
+		askForContactsPermissions();
+	}
+
 	protected void openConversationForContact(int position) {
 		Contact contact = (Contact) contacts.get(position);
 		Conversation conversation = xmppConnectionService
@@ -275,7 +288,7 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 		if (!conversation.getMucOptions().online()) {
 			xmppConnectionService.joinMuc(conversation);
 		}
-		if (!bookmark.autojoin()) {
+		if (!bookmark.autojoin() && getPreferences().getBoolean("autojoin", true)) {
 			bookmark.setAutojoin(true);
 			xmppConnectionService.pushBookmarks(bookmark.getAccount());
 		}
@@ -290,7 +303,7 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 
 	protected void toggleContactBlock() {
 		final int position = contact_context_id;
-		BlockContactDialog.show(this, xmppConnectionService, (Contact)contacts.get(position));
+		BlockContactDialog.show(this, xmppConnectionService, (Contact) contacts.get(position));
 	}
 
 	protected void deleteContact() {
@@ -300,7 +313,7 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 		builder.setNegativeButton(R.string.cancel, null);
 		builder.setTitle(R.string.action_delete_contact);
 		builder.setMessage(getString(R.string.remove_contact_text,
-					contact.getJid()));
+				contact.getJid()));
 		builder.setPositiveButton(R.string.delete, new OnClickListener() {
 
 			@Override
@@ -320,7 +333,7 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 		builder.setNegativeButton(R.string.cancel, null);
 		builder.setTitle(R.string.delete_bookmark);
 		builder.setMessage(getString(R.string.remove_bookmark_text,
-					bookmark.getJid()));
+				bookmark.getJid()));
 		builder.setPositiveButton(R.string.delete, new OnClickListener() {
 
 			@Override
@@ -338,66 +351,37 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 
 	@SuppressLint("InflateParams")
 	protected void showCreateContactDialog(final String prefilledJid, final String fingerprint) {
-		AlertDialog.Builder builder = new AlertDialog.Builder(this);
-		builder.setTitle(R.string.create_contact);
-		View dialogView = getLayoutInflater().inflate(R.layout.create_contact_dialog, null);
-		final Spinner spinner = (Spinner) dialogView.findViewById(R.id.account);
-		final AutoCompleteTextView jid = (AutoCompleteTextView) dialogView.findViewById(R.id.jid);
-		jid.setAdapter(new KnownHostsAdapter(this,android.R.layout.simple_list_item_1, mKnownHosts));
-		if (prefilledJid != null) {
-			jid.append(prefilledJid);
-			if (fingerprint!=null) {
-				jid.setFocusable(false);
-				jid.setFocusableInTouchMode(false);
-				jid.setClickable(false);
-				jid.setCursorVisible(false);
-			}
-		}
-		populateAccountSpinner(spinner);
-		builder.setView(dialogView);
-		builder.setNegativeButton(R.string.cancel, null);
-		builder.setPositiveButton(R.string.create, null);
-		final AlertDialog dialog = builder.create();
-		dialog.show();
-		dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(
-				new View.OnClickListener() {
+		EnterJidDialog dialog = new EnterJidDialog(
+			this, mKnownHosts, mActivatedAccounts,
+			getString(R.string.create_contact), getString(R.string.create),
+			prefilledJid, null, fingerprint == null
+		);
 
-					@Override
-					public void onClick(final View v) {
-						if (!xmppConnectionServiceBound) {
-							return;
-						}
-						final Jid accountJid;
-						try {
-							accountJid = Jid.fromString((String) spinner.getSelectedItem());
-						} catch (final InvalidJidException e) {
-							return;
-						}
-						final Jid contactJid;
-						try {
-							contactJid = Jid.fromString(jid.getText().toString());
-						} catch (final InvalidJidException e) {
-							jid.setError(getString(R.string.invalid_jid));
-							return;
-						}
-						final Account account = xmppConnectionService
-							.findAccountByJid(accountJid);
-						if (account == null) {
-							dialog.dismiss();
-							return;
-						}
-						final Contact contact = account.getRoster().getContact(contactJid);
-						if (contact.showInRoster()) {
-							jid.setError(getString(R.string.contact_already_exists));
-						} else {
-							contact.addOtrFingerprint(fingerprint);
-							xmppConnectionService.createContact(contact);
-							dialog.dismiss();
-							switchToConversation(contact);
-						}
-					}
-				});
+		dialog.setOnEnterJidDialogPositiveListener(new EnterJidDialog.OnEnterJidDialogPositiveListener() {
+			@Override
+			public boolean onEnterJidDialogPositive(Jid accountJid, Jid contactJid) throws EnterJidDialog.JidError {
+				if (!xmppConnectionServiceBound) {
+					return false;
+				}
+
+				final Account account = xmppConnectionService.findAccountByJid(accountJid);
+				if (account == null) {
+					return true;
+				}
 
+				final Contact contact = account.getRoster().getContact(contactJid);
+				if (contact.showInRoster()) {
+					throw new EnterJidDialog.JidError(getString(R.string.contact_already_exists));
+				} else {
+					contact.addOtrFingerprint(fingerprint);
+					xmppConnectionService.createContact(contact);
+					switchToConversation(contact);
+					return true;
+				}
+			}
+		});
+
+		dialog.show();
 	}
 
 	@SuppressLint("InflateParams")
@@ -407,11 +391,17 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 		final View dialogView = getLayoutInflater().inflate(R.layout.join_conference_dialog, null);
 		final Spinner spinner = (Spinner) dialogView.findViewById(R.id.account);
 		final AutoCompleteTextView jid = (AutoCompleteTextView) dialogView.findViewById(R.id.jid);
-		jid.setAdapter(new KnownHostsAdapter(this,android.R.layout.simple_list_item_1, mKnownConferenceHosts));
+		final boolean lock = Config.LOCK_DOMAINS_IN_CONVERSATIONS && Config.CONFERENCE_DOMAIN_LOCK != null;
+		final TextView jabberIdDesc = (TextView) dialogView.findViewById(R.id.jabber_id);
+		jabberIdDesc.setText(lock ? R.string.conference_name : R.string.conference_address);
+		jid.setHint(lock ? R.string.conference_name : R.string.conference_address_example);
+		if (!lock) {
+			jid.setAdapter(new KnownHostsAdapter(this, android.R.layout.simple_list_item_1, mKnownConferenceHosts));
+		}
 		if (prefilledJid != null) {
 			jid.append(prefilledJid);
 		}
-		populateAccountSpinner(spinner);
+		populateAccountSpinner(this, mActivatedAccounts, spinner);
 		final Checkable bookmarkCheckBox = (CheckBox) dialogView
 			.findViewById(R.id.bookmark);
 		builder.setView(dialogView);
@@ -427,49 +417,48 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 						if (!xmppConnectionServiceBound) {
 							return;
 						}
-						final Jid accountJid;
-						try {
-							accountJid = Jid.fromString((String) spinner.getSelectedItem());
-						} catch (final InvalidJidException e) {
+						final Account account = getSelectedAccount(spinner);
+						if (account == null) {
 							return;
 						}
 						final Jid conferenceJid;
 						try {
-							conferenceJid = Jid.fromString(jid.getText().toString());
+							if (lock) {
+								conferenceJid = Jid.fromParts(jid.getText().toString(),Config.CONFERENCE_DOMAIN_LOCK, null);
+							} else {
+								conferenceJid = Jid.fromString(jid.getText().toString());
+							}
 						} catch (final InvalidJidException e) {
-							jid.setError(getString(R.string.invalid_jid));
-							return;
-						}
-						final Account account = xmppConnectionService
-							.findAccountByJid(accountJid);
-						if (account == null) {
-							dialog.dismiss();
+							jid.setError(getString(lock ? R.string.invalid_conference_name : R.string.invalid_jid));
 							return;
 						}
+
 						if (bookmarkCheckBox.isChecked()) {
 							if (account.hasBookmarkFor(conferenceJid)) {
 								jid.setError(getString(R.string.bookmark_already_exists));
 							} else {
-								final Bookmark bookmark = new Bookmark(account,conferenceJid.toBareJid());
-								bookmark.setAutojoin(true);
+								final Bookmark bookmark = new Bookmark(account, conferenceJid.toBareJid());
+								bookmark.setAutojoin(getPreferences().getBoolean("autojoin", true));
+								String nick = conferenceJid.getResourcepart();
+								if (nick != null && !nick.isEmpty()) {
+									bookmark.setNick(nick);
+								}
 								account.getBookmarks().add(bookmark);
-								xmppConnectionService
-									.pushBookmarks(account);
+								xmppConnectionService.pushBookmarks(account);
 								final Conversation conversation = xmppConnectionService
-									.findOrCreateConversation(account,
-											conferenceJid, true);
+										.findOrCreateConversation(account,
+												conferenceJid, true);
 								conversation.setBookmark(bookmark);
 								if (!conversation.getMucOptions().online()) {
-									xmppConnectionService
-										.joinMuc(conversation);
+									xmppConnectionService.joinMuc(conversation);
 								}
 								dialog.dismiss();
 								switchToConversation(conversation);
 							}
 						} else {
 							final Conversation conversation = xmppConnectionService
-								.findOrCreateConversation(account,
-										conferenceJid, true);
+									.findOrCreateConversation(account,
+											conferenceJid, true);
 							if (!conversation.getMucOptions().online()) {
 								xmppConnectionService.joinMuc(conversation);
 							}
@@ -480,6 +469,23 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 				});
 	}
 
+	private Account getSelectedAccount(Spinner spinner) {
+		if (!spinner.isEnabled()) {
+			return null;
+		}
+		Jid jid;
+		try {
+			if (Config.DOMAIN_LOCK != null) {
+				jid = Jid.fromParts((String) spinner.getSelectedItem(), Config.DOMAIN_LOCK, null);
+			} else {
+				jid = Jid.fromString((String) spinner.getSelectedItem());
+			}
+		} catch (final InvalidJidException e) {
+			return null;
+		}
+		return xmppConnectionService.findAccountByJid(jid);
+	}
+
 	protected void switchToConversation(Contact contact) {
 		Conversation conversation = xmppConnectionService
 			.findOrCreateConversation(contact.getAccount(),
@@ -487,11 +493,21 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 		switchToConversation(conversation);
 	}
 
-	private void populateAccountSpinner(Spinner spinner) {
-		ArrayAdapter<String> adapter = new ArrayAdapter<>(this,
-				android.R.layout.simple_spinner_item, mActivatedAccounts);
-		adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
-		spinner.setAdapter(adapter);
+	public static void populateAccountSpinner(Context context, List<String> accounts, Spinner spinner) {
+		if (accounts.size() > 0) {
+			ArrayAdapter<String> adapter = new ArrayAdapter<>(context,
+					android.R.layout.simple_spinner_item, accounts);
+			adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+			spinner.setAdapter(adapter);
+			spinner.setEnabled(true);
+		} else {
+			ArrayAdapter<String> adapter = new ArrayAdapter<>(context,
+					android.R.layout.simple_spinner_item,
+					Arrays.asList(new String[]{context.getString(R.string.no_accounts)}));
+			adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+			spinner.setAdapter(adapter);
+			spinner.setEnabled(false);
+		}
 	}
 
 	@Override
@@ -573,12 +589,51 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 		super.onActivityResult(requestCode, requestCode, intent);
 	}
 
+	private void askForContactsPermissions() {
+		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+			if (checkSelfPermission(Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED) {
+				if (mRequestedContactsPermission.compareAndSet(false, true)) {
+					if (shouldShowRequestPermissionRationale(Manifest.permission.READ_CONTACTS)) {
+						AlertDialog.Builder builder = new AlertDialog.Builder(this);
+						builder.setTitle(R.string.sync_with_contacts);
+						builder.setMessage(R.string.sync_with_contacts_long);
+						builder.setPositiveButton(R.string.next, new OnClickListener() {
+							@Override
+							public void onClick(DialogInterface dialog, int which) {
+								if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+									requestPermissions(new String[]{Manifest.permission.READ_CONTACTS}, REQUEST_SYNC_CONTACTS);
+								}
+							}
+						});
+						builder.create().show();
+					} else {
+						requestPermissions(new String[]{Manifest.permission.READ_CONTACTS}, 0);
+					}
+				}
+			}
+		}
+	}
+
+	@Override
+	public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
+		if (grantResults.length > 0)
+			if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+				if (requestCode == REQUEST_SYNC_CONTACTS && xmppConnectionServiceBound) {
+					xmppConnectionService.loadPhoneContacts();
+				}
+			}
+	}
+
 	@Override
 	protected void onBackendConnected() {
 		this.mActivatedAccounts.clear();
 		for (Account account : xmppConnectionService.getAccounts()) {
 			if (account.getStatus() != Account.State.DISABLED) {
-				this.mActivatedAccounts.add(account.getJid().toBareJid().toString());
+				if (Config.DOMAIN_LOCK != null) {
+					this.mActivatedAccounts.add(account.getJid().getLocalpart());
+				} else {
+					this.mActivatedAccounts.add(account.getJid().toBareJid().toString());
+				}
 			}
 		}
 		final Intent intent = getIntent();
@@ -683,9 +738,11 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 		for (Account account : xmppConnectionService.getAccounts()) {
 			if (account.getStatus() != Account.State.DISABLED) {
 				for (Contact contact : account.getRoster().getContacts()) {
+					Presence p = contact.getPresences().getMostAvailablePresence();
+					Presence.Status s = p == null ? Presence.Status.OFFLINE : p.getStatus();
 					if (contact.showInRoster() && contact.match(needle)
 							&& (!this.mHideOfflineContacts
-							|| contact.getPresences().getMostAvailableStatus() < Presences.OFFLINE)) {
+							|| s.compareTo(Presence.Status.OFFLINE) < 0)) {
 						this.contacts.add(contact);
 					}
 				}
@@ -761,7 +818,7 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 			final AdapterView.AdapterContextMenuInfo acmi = (AdapterContextMenuInfo) menuInfo;
 			if (mResContextMenu == R.menu.conference_context) {
 				activity.conference_context_id = acmi.position;
-			} else {
+			} else if (mResContextMenu == R.menu.contact_context){
 				activity.contact_context_id = acmi.position;
 				final Blockable contact = (Contact) activity.contacts.get(acmi.position);
 				final MenuItem blockUnblockItem = menu.findItem(R.id.context_contact_block_unblock);
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/TrustKeysActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/TrustKeysActivity.java
new file mode 100644
index 00000000..167b207f
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/TrustKeysActivity.java
@@ -0,0 +1,301 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.CompoundButton;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import org.whispersystems.libaxolotl.IdentityKey;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.crypto.axolotl.AxolotlService;
+import de.thedevstack.conversationsplus.crypto.axolotl.XmppAxolotlSession;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.xmpp.OnKeyStatusUpdated;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class TrustKeysActivity extends XmppActivity implements OnKeyStatusUpdated {
+	private Jid accountJid;
+	private Jid contactJid;
+
+	private Contact contact;
+	private Account mAccount;
+	private TextView keyErrorMessage;
+	private LinearLayout keyErrorMessageCard;
+	private TextView ownKeysTitle;
+	private LinearLayout ownKeys;
+	private LinearLayout ownKeysCard;
+	private TextView foreignKeysTitle;
+	private LinearLayout foreignKeys;
+	private LinearLayout foreignKeysCard;
+	private Button mSaveButton;
+	private Button mCancelButton;
+
+	private AxolotlService.FetchStatus lastFetchReport = AxolotlService.FetchStatus.SUCCESS;
+
+	private final Map<String, Boolean> ownKeysToTrust = new HashMap<>();
+	private final Map<String, Boolean> foreignKeysToTrust = new HashMap<>();
+
+	private final OnClickListener mSaveButtonListener = new OnClickListener() {
+		@Override
+		public void onClick(View v) {
+			commitTrusts();
+			finishOk();
+		}
+	};
+
+	private final OnClickListener mCancelButtonListener = new OnClickListener() {
+		@Override
+		public void onClick(View v) {
+			setResult(RESULT_CANCELED);
+			finish();
+		}
+	};
+
+	@Override
+	protected void refreshUiReal() {
+		invalidateOptionsMenu();
+		populateView();
+	}
+
+	@Override
+	protected String getShareableUri() {
+		if (contact != null) {
+			return contact.getShareableUri();
+		} else {
+			return "";
+		}
+	}
+
+	@Override
+	protected void onCreate(final Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.activity_trust_keys);
+		try {
+			this.accountJid = Jid.fromString(getIntent().getExtras().getString(EXTRA_ACCOUNT));
+		} catch (final InvalidJidException ignored) {
+		}
+		try {
+			this.contactJid = Jid.fromString(getIntent().getExtras().getString("contact"));
+		} catch (final InvalidJidException ignored) {
+		}
+
+		keyErrorMessageCard = (LinearLayout) findViewById(R.id.key_error_message_card);
+		keyErrorMessage = (TextView) findViewById(R.id.key_error_message);
+		ownKeysTitle = (TextView) findViewById(R.id.own_keys_title);
+		ownKeys = (LinearLayout) findViewById(R.id.own_keys_details);
+		ownKeysCard = (LinearLayout) findViewById(R.id.own_keys_card);
+		foreignKeysTitle = (TextView) findViewById(R.id.foreign_keys_title);
+		foreignKeys = (LinearLayout) findViewById(R.id.foreign_keys_details);
+		foreignKeysCard = (LinearLayout) findViewById(R.id.foreign_keys_card);
+		mCancelButton = (Button) findViewById(R.id.cancel_button);
+		mCancelButton.setOnClickListener(mCancelButtonListener);
+		mSaveButton = (Button) findViewById(R.id.save_button);
+		mSaveButton.setOnClickListener(mSaveButtonListener);
+
+
+		if (getActionBar() != null) {
+			getActionBar().setHomeButtonEnabled(true);
+			getActionBar().setDisplayHomeAsUpEnabled(true);
+		}
+	}
+
+	private void populateView() {
+		setTitle(getString(R.string.trust_omemo_fingerprints));
+		ownKeys.removeAllViews();
+		foreignKeys.removeAllViews();
+		boolean hasOwnKeys = false;
+		boolean hasForeignKeys = false;
+		for(final String fingerprint : ownKeysToTrust.keySet()) {
+			hasOwnKeys = true;
+			addFingerprintRowWithListeners(ownKeys, contact.getAccount(), fingerprint, false,
+					XmppAxolotlSession.Trust.fromBoolean(ownKeysToTrust.get(fingerprint)), false,
+					new CompoundButton.OnCheckedChangeListener() {
+						@Override
+						public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+							ownKeysToTrust.put(fingerprint, isChecked);
+							// own fingerprints have no impact on locked status.
+						}
+					},
+					null,
+					null
+			);
+		}
+		for(final String fingerprint : foreignKeysToTrust.keySet()) {
+			hasForeignKeys = true;
+			addFingerprintRowWithListeners(foreignKeys, contact.getAccount(), fingerprint, false,
+					XmppAxolotlSession.Trust.fromBoolean(foreignKeysToTrust.get(fingerprint)), false,
+					new CompoundButton.OnCheckedChangeListener() {
+						@Override
+						public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+							foreignKeysToTrust.put(fingerprint, isChecked);
+							lockOrUnlockAsNeeded();
+						}
+					},
+					null,
+					null
+			);
+		}
+
+		if(hasOwnKeys) {
+			ownKeysTitle.setText(accountJid.toString());
+			ownKeysCard.setVisibility(View.VISIBLE);
+		}
+		if(hasForeignKeys) {
+			foreignKeysTitle.setText(contactJid.toString());
+			foreignKeysCard.setVisibility(View.VISIBLE);
+		}
+		if(hasPendingKeyFetches()) {
+			setFetching();
+			lock();
+		} else {
+			if (!hasForeignKeys && hasNoOtherTrustedKeys()) {
+				keyErrorMessageCard.setVisibility(View.VISIBLE);
+				if (lastFetchReport == AxolotlService.FetchStatus.ERROR
+						|| contact.getAccount().getAxolotlService().fetchMapHasErrors(contact)) {
+					keyErrorMessage.setText(R.string.error_no_keys_to_trust_server_error);
+				} else {
+					keyErrorMessage.setText(R.string.error_no_keys_to_trust);
+				}
+				ownKeys.removeAllViews(); ownKeysCard.setVisibility(View.GONE);
+				foreignKeys.removeAllViews(); foreignKeysCard.setVisibility(View.GONE);
+			}
+			lockOrUnlockAsNeeded();
+			setDone();
+		}
+	}
+
+	private boolean reloadFingerprints() {
+		ownKeysToTrust.clear();
+		foreignKeysToTrust.clear();
+		AxolotlService service = this.mAccount.getAxolotlService();
+		Set<IdentityKey> ownKeysSet = service.getKeysWithTrust(XmppAxolotlSession.Trust.UNDECIDED);
+		Set<IdentityKey> foreignKeysSet = service.getKeysWithTrust(XmppAxolotlSession.Trust.UNDECIDED, contact);
+		if (hasNoOtherTrustedKeys() && ownKeysSet.size() == 0) {
+			foreignKeysSet.addAll(service.getKeysWithTrust(XmppAxolotlSession.Trust.UNTRUSTED, contact));
+		}
+		for(final IdentityKey identityKey : ownKeysSet) {
+			if(!ownKeysToTrust.containsKey(identityKey)) {
+				ownKeysToTrust.put(identityKey.getFingerprint().replaceAll("\\s", ""), false);
+			}
+		}
+		for(final IdentityKey identityKey : foreignKeysSet) {
+			if(!foreignKeysToTrust.containsKey(identityKey)) {
+				foreignKeysToTrust.put(identityKey.getFingerprint().replaceAll("\\s", ""), false);
+			}
+		}
+		return ownKeysSet.size() + foreignKeysSet.size() > 0;
+	}
+
+	@Override
+	public void onBackendConnected() {
+		if ((accountJid != null) && (contactJid != null)) {
+			this.mAccount = xmppConnectionService.findAccountByJid(accountJid);
+			if (this.mAccount == null) {
+				return;
+			}
+			this.contact = this.mAccount.getRoster().getContact(contactJid);
+			reloadFingerprints();
+			populateView();
+		}
+	}
+
+	private boolean hasNoOtherTrustedKeys() {
+		return mAccount == null || mAccount.getAxolotlService().getNumTrustedKeys(contact) == 0;
+	}
+
+	private boolean hasPendingKeyFetches() {
+		return mAccount != null && contact != null && mAccount.getAxolotlService().hasPendingKeyFetches(mAccount,contact);
+	}
+
+
+	@Override
+	public void onKeyStatusUpdated(final AxolotlService.FetchStatus report) {
+		if (report != null) {
+			lastFetchReport = report;
+			runOnUiThread(new Runnable() {
+				@Override
+				public void run() {
+					switch (report) {
+						case ERROR:
+							Toast.makeText(TrustKeysActivity.this,R.string.error_fetching_omemo_key,Toast.LENGTH_SHORT).show();
+							break;
+						case SUCCESS_VERIFIED:
+							Toast.makeText(TrustKeysActivity.this,R.string.verified_omemo_key_with_certificate,Toast.LENGTH_LONG).show();
+							break;
+					}
+				}
+			});
+
+		}
+		boolean keysToTrust = reloadFingerprints();
+		if (keysToTrust || hasPendingKeyFetches() || hasNoOtherTrustedKeys()) {
+			refreshUi();
+		} else {
+			runOnUiThread(new Runnable() {
+				@Override
+				public void run() {
+					finishOk();
+				}
+			});
+
+		}
+	}
+
+	private void finishOk() {
+		Intent data = new Intent();
+		data.putExtra("choice", getIntent().getIntExtra("choice", ConversationActivity.ATTACHMENT_CHOICE_INVALID));
+		setResult(RESULT_OK, data);
+		finish();
+	}
+
+	private void commitTrusts() {
+		for(final String fingerprint :ownKeysToTrust.keySet()) {
+			contact.getAccount().getAxolotlService().setFingerprintTrust(
+					fingerprint,
+					XmppAxolotlSession.Trust.fromBoolean(ownKeysToTrust.get(fingerprint)));
+		}
+		for(final String fingerprint:foreignKeysToTrust.keySet()) {
+			contact.getAccount().getAxolotlService().setFingerprintTrust(
+					fingerprint,
+					XmppAxolotlSession.Trust.fromBoolean(foreignKeysToTrust.get(fingerprint)));
+		}
+	}
+
+	private void unlock() {
+		mSaveButton.setEnabled(true);
+		mSaveButton.setTextColor(getPrimaryTextColor());
+	}
+
+	private void lock() {
+		mSaveButton.setEnabled(false);
+		mSaveButton.setTextColor(getSecondaryTextColor());
+	}
+
+	private void lockOrUnlockAsNeeded() {
+		if (hasNoOtherTrustedKeys() && !foreignKeysToTrust.values().contains(true)){
+			lock();
+		} else {
+			unlock();
+		}
+	}
+
+	private void setDone() {
+		mSaveButton.setText(getString(R.string.done));
+	}
+
+	private void setFetching() {
+		mSaveButton.setText(getString(R.string.fetching_keys));
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/UiCallback.java b/src/main/java/de/thedevstack/conversationsplus/ui/UiCallback.java
index 0d23d29e..d5291b80 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/UiCallback.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/UiCallback.java
@@ -3,9 +3,9 @@ package de.thedevstack.conversationsplus.ui;
 import android.app.PendingIntent;
 
 public interface UiCallback<T> {
-	public void success(T object);
+	void success(T object);
 
-	public void error(int errorCode, T object);
+	void error(int errorCode, T object);
 
-	public void userInputRequried(PendingIntent pi, T object);
+	void userInputRequried(PendingIntent pi, T object);
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/VerifyOTRActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/VerifyOTRActivity.java
index 9f867dd2..494d4bea 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/VerifyOTRActivity.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/VerifyOTRActivity.java
@@ -196,9 +196,8 @@ public class VerifyOTRActivity extends XmppActivity implements XmppConnectionSer
 
 	protected boolean handleIntent(Intent intent) {
 		if (intent != null && intent.getAction().equals(ACTION_VERIFY_CONTACT)) {
-			try {
-				this.mAccount = this.xmppConnectionService.findAccountByJid(Jid.fromString(intent.getExtras().getString("account")));
-			} catch (final InvalidJidException ignored) {
+			this.mAccount = extractAccount(intent);
+			if (this.mAccount == null) {
 				return false;
 			}
 			try {
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/XmppActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/XmppActivity.java
index 40fbe7c1..1fbb3b1d 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/XmppActivity.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/XmppActivity.java
@@ -1,5 +1,6 @@
 package de.thedevstack.conversationsplus.ui;
 
+import android.Manifest;
 import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.app.ActionBar;
@@ -16,6 +17,7 @@ import android.content.DialogInterface.OnClickListener;
 import android.content.Intent;
 import android.content.IntentSender.SendIntentException;
 import android.content.ServiceConnection;
+import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
 import android.content.res.Resources;
@@ -34,15 +36,19 @@ import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.IBinder;
+import android.os.PowerManager;
 import android.os.SystemClock;
+import android.preference.PreferenceManager;
 import android.text.InputType;
 import android.util.DisplayMetrics;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.inputmethod.InputMethodManager;
+import android.widget.CompoundButton;
 import android.widget.EditText;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
+import android.widget.TextView;
 import android.widget.Toast;
 
 import com.google.zxing.BarcodeFormat;
@@ -62,9 +68,11 @@ import java.util.List;
 import java.util.concurrent.RejectedExecutionException;
 
 import de.thedevstack.android.logcat.Logging;
-import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
+import de.thedevstack.conversationsplus.utils.ImageUtil;
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.crypto.axolotl.XmppAxolotlSession;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Contact;
 import de.thedevstack.conversationsplus.entities.Conversation;
@@ -73,8 +81,10 @@ import de.thedevstack.conversationsplus.entities.MucOptions;
 import de.thedevstack.conversationsplus.entities.Presences;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
 import de.thedevstack.conversationsplus.services.XmppConnectionService.XmppConnectionBinder;
+import de.thedevstack.conversationsplus.ui.widget.Switch;
+import de.thedevstack.conversationsplus.utils.CryptoHelper;
 import de.thedevstack.conversationsplus.utils.ExceptionHelper;
-import de.thedevstack.conversationsplus.utils.ImageUtil;
+import de.thedevstack.conversationsplus.xmpp.OnKeyStatusUpdated;
 import de.thedevstack.conversationsplus.xmpp.OnUpdateBlocklist;
 import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
@@ -83,6 +93,10 @@ public abstract class XmppActivity extends Activity {
 
 	protected static final int REQUEST_ANNOUNCE_PGP = 0x0101;
 	protected static final int REQUEST_INVITE_TO_CONVERSATION = 0x0102;
+	protected static final int REQUEST_CHOOSE_PGP_ID = 0x0103;
+	protected static final int REQUEST_BATTERY_OP = 0x13849ff;
+
+	public static final String EXTRA_ACCOUNT = "account";
 
 	public XmppConnectionService xmppConnectionService;
 	public boolean xmppConnectionServiceBound = false;
@@ -90,6 +104,7 @@ public abstract class XmppActivity extends Activity {
 
 	protected int mPrimaryTextColor;
 	protected int mSecondaryTextColor;
+	protected int mTertiaryTextColor;
 	protected int mPrimaryBackgroundColor;
 	protected int mSecondaryBackgroundColor;
 	protected int mColorRed;
@@ -97,6 +112,8 @@ public abstract class XmppActivity extends Activity {
 	protected int mColorGreen;
 	protected int mPrimaryColor;
 
+	protected boolean mUseSubject = true;
+
 	private DisplayMetrics metrics;
 	protected int mTheme;
 	protected boolean mUsingEnterKey = false;
@@ -114,7 +131,7 @@ public abstract class XmppActivity extends Activity {
 	protected ConferenceInvite mPendingConferenceInvite = null;
 
 
-	protected void refreshUi() {
+	protected final void refreshUi() {
 		final long diff = SystemClock.elapsedRealtime() - mLastUiRefresh;
 		if (diff > Config.REFRESH_UI_INTERVAL) {
 			mRefreshUiHandler.removeCallbacks(mRefreshUiRunnable);
@@ -126,9 +143,7 @@ public abstract class XmppActivity extends Activity {
 		}
 	}
 
-	protected void refreshUiReal() {
-
-	};
+	abstract protected void refreshUiReal();
 
 	protected interface OnValueEdited {
 		public void onValueEdited(String value);
@@ -273,6 +288,9 @@ public abstract class XmppActivity extends Activity {
 		if (this instanceof XmppConnectionService.OnAccountUpdate) {
 			this.xmppConnectionService.setOnAccountListChangedListener((XmppConnectionService.OnAccountUpdate) this);
 		}
+		if (this instanceof XmppConnectionService.OnCaptchaRequested) {
+			this.xmppConnectionService.setOnCaptchaRequestedListener((XmppConnectionService.OnCaptchaRequested) this);
+		}
 		if (this instanceof XmppConnectionService.OnRosterUpdate) {
 			this.xmppConnectionService.setOnRosterUpdateListener((XmppConnectionService.OnRosterUpdate) this);
 		}
@@ -285,6 +303,9 @@ public abstract class XmppActivity extends Activity {
 		if (this instanceof XmppConnectionService.OnShowErrorToast) {
 			this.xmppConnectionService.setOnShowErrorToastListener((XmppConnectionService.OnShowErrorToast) this);
 		}
+		if (this instanceof OnKeyStatusUpdated) {
+			this.xmppConnectionService.setOnKeyStatusUpdatedListener((OnKeyStatusUpdated) this);
+		}
 	}
 
 	protected void unregisterListeners() {
@@ -294,6 +315,9 @@ public abstract class XmppActivity extends Activity {
 		if (this instanceof XmppConnectionService.OnAccountUpdate) {
 			this.xmppConnectionService.removeOnAccountListChangedListener();
 		}
+		if (this instanceof XmppConnectionService.OnCaptchaRequested) {
+			this.xmppConnectionService.removeOnCaptchaRequestedListener();
+		}
 		if (this instanceof XmppConnectionService.OnRosterUpdate) {
 			this.xmppConnectionService.removeOnRosterUpdateListener();
 		}
@@ -306,6 +330,9 @@ public abstract class XmppActivity extends Activity {
 		if (this instanceof XmppConnectionService.OnShowErrorToast) {
 			this.xmppConnectionService.removeOnShowErrorToastListener();
 		}
+		if (this instanceof OnKeyStatusUpdated) {
+			this.xmppConnectionService.removeOnNewKeysAvailableListener();
+		}
 	}
 
 	@Override
@@ -334,34 +361,63 @@ public abstract class XmppActivity extends Activity {
 		ExceptionHelper.init(getApplicationContext());
 		mPrimaryTextColor = getResources().getColor(R.color.primaryText);
 		mSecondaryTextColor = getResources().getColor(R.color.secondaryText);
+		mTertiaryTextColor = getResources().getColor(R.color.black12);
 		mColorRed = getResources().getColor(R.color.warning);
+		mColorOrange = getResources().getColor(R.color.orange500);
 		mColorGreen = getResources().getColor(R.color.online);
+		mPrimaryColor = getResources().getColor(R.color.primary);
 		mPrimaryBackgroundColor = getResources().getColor(R.color.primaryBackground);
 		mSecondaryBackgroundColor = getResources().getColor(R.color.secondaryBackground);
 		this.mTheme = findTheme();
 		setTheme(this.mTheme);
 		this.mUsingEnterKey = ConversationsPlusPreferences.displayEnterKey();
-		
+		mUseSubject = getPreferences().getBoolean("use_subject", true);
 		final ActionBar ab = getActionBar();
 		if (ab!=null) {
 			ab.setDisplayHomeAsUpEnabled(true);
 		}
 	}
 
+	protected boolean showBatteryOptimizationWarning() {
+		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+			PowerManager pm = (PowerManager) getSystemService(POWER_SERVICE);
+			return !pm.isIgnoringBatteryOptimizations(getPackageName());
+		} else {
+			return false;
+		}
+	}
+
+	protected boolean usingEnterKey() {
+		return getPreferences().getBoolean("display_enter_key", false);
+	}
+
+	protected SharedPreferences getPreferences() {
+		return PreferenceManager
+			.getDefaultSharedPreferences(getApplicationContext());
+	}
+
+	public boolean useSubjectToIdentifyConference() {
+		return mUseSubject;
+	}
+
 	public void switchToConversation(Conversation conversation) {
 		switchToConversation(conversation, null, false);
 	}
 
 	public void switchToConversation(Conversation conversation, String text,
 			boolean newTask) {
-		switchToConversation(conversation,text,null,newTask);
+		switchToConversation(conversation,text,null,false,newTask);
 	}
 
 	public void highlightInMuc(Conversation conversation, String nick) {
-		switchToConversation(conversation, null, nick, false);
+		switchToConversation(conversation, null, nick, false, false);
 	}
 
-	private void switchToConversation(Conversation conversation, String text, String nick, boolean newTask) {
+	public void privateMsgInMuc(Conversation conversation, String nick) {
+		switchToConversation(conversation, null, nick, true, false);
+	}
+
+	private void switchToConversation(Conversation conversation, String text, String nick, boolean pm, boolean newTask) {
 		Intent viewConversationIntent = new Intent(this,
 				ConversationActivity.class);
 		viewConversationIntent.setAction(Intent.ACTION_VIEW);
@@ -372,6 +428,7 @@ public abstract class XmppActivity extends Activity {
 		}
 		if (nick != null) {
 			viewConversationIntent.putExtra(ConversationActivity.NICK, nick);
+			viewConversationIntent.putExtra(ConversationActivity.PRIVATE_MESSAGE,pm);
 		}
 		viewConversationIntent.setType(ConversationActivity.VIEW_CONVERSATION);
 		if (newTask) {
@@ -387,16 +444,26 @@ public abstract class XmppActivity extends Activity {
 	}
 
 	public void switchToContactDetails(Contact contact) {
+		switchToContactDetails(contact, null);
+	}
+
+	public void switchToContactDetails(Contact contact, String messageFingerprint) {
 		Intent intent = new Intent(this, ContactDetailsActivity.class);
 		intent.setAction(ContactDetailsActivity.ACTION_VIEW_CONTACT);
-		intent.putExtra("account", contact.getAccount().getJid().toBareJid().toString());
+		intent.putExtra(EXTRA_ACCOUNT, contact.getAccount().getJid().toBareJid().toString());
 		intent.putExtra("contact", contact.getJid().toString());
+		intent.putExtra("fingerprint", messageFingerprint);
 		startActivity(intent);
 	}
 
 	public void switchToAccount(Account account) {
+		switchToAccount(account, false);
+	}
+
+	public void switchToAccount(Account account, boolean init) {
 		Intent intent = new Intent(this, EditAccountActivity.class);
 		intent.putExtra("jid", account.getJid().toBareJid().toString());
+		intent.putExtra("init", init);
 		startActivity(intent);
 	}
 
@@ -417,54 +484,81 @@ public abstract class XmppActivity extends Activity {
 		intent.putExtra("filter_contacts", contacts.toArray(new String[contacts.size()]));
 		intent.putExtra("conversation", conversation.getUuid());
 		intent.putExtra("multiple", true);
+		intent.putExtra("show_enter_jid", true);
+		intent.putExtra(EXTRA_ACCOUNT, conversation.getAccount().getJid().toBareJid().toString());
 		startActivityForResult(intent, REQUEST_INVITE_TO_CONVERSATION);
 	}
 
 	protected void announcePgp(Account account, final Conversation conversation) {
-		xmppConnectionService.getPgpEngine().generateSignature(account,
-                "online", new UiCallback<Account>() {
-
-                    @Override
-                    public void userInputRequried(PendingIntent pi,
-                                                  Account account) {
-                        try {
-                            startIntentSenderForResult(pi.getIntentSender(),
-                                    REQUEST_ANNOUNCE_PGP, null, 0, 0, 0);
-                        } catch (final SendIntentException ignored) {
-                        }
-                    }
+		if (account.getPgpId() == -1) {
+			choosePgpSignId(account);
+		} else {
+			xmppConnectionService.getPgpEngine().generateSignature(account, "", new UiCallback<Account>() {
 
-                    @Override
-                    public void success(Account account) {
-                        xmppConnectionService.databaseBackend.updateAccount(account);
-                        xmppConnectionService.sendPresence(account);
-                        if (conversation != null) {
-                            conversation.setNextEncryption(Message.ENCRYPTION_PGP);
-                            xmppConnectionService.databaseBackend.updateConversation(conversation);
-                        }
-                    }
+				@Override
+				public void userInputRequried(PendingIntent pi,
+											  Account account) {
+					try {
+						startIntentSenderForResult(pi.getIntentSender(),
+								REQUEST_ANNOUNCE_PGP, null, 0, 0, 0);
+					} catch (final SendIntentException ignored) {
+					}
+				}
 
-                    @Override
-                    public void error(int error, Account account) {
-                        displayErrorDialog(error);
-                    }
-                });
+				@Override
+				public void success(Account account) {
+					xmppConnectionService.databaseBackend.updateAccount(account);
+					xmppConnectionService.sendPresence(account);
+					if (conversation != null) {
+						conversation.setNextEncryption(Message.ENCRYPTION_PGP);
+						xmppConnectionService.databaseBackend.updateConversation(conversation);
+					}
+				}
+
+				@Override
+				public void error(int error, Account account) {
+					displayErrorDialog(error);
+				}
+			});
+		}
+	}
+
+	protected void choosePgpSignId(Account account) {
+		xmppConnectionService.getPgpEngine().chooseKey(account, new UiCallback<Account>() {
+			@Override
+			public void success(Account account1) {
+			}
+
+			@Override
+			public void error(int errorCode, Account object) {
+
+			}
+
+			@Override
+			public void userInputRequried(PendingIntent pi, Account object) {
+				try {
+					startIntentSenderForResult(pi.getIntentSender(),
+							REQUEST_CHOOSE_PGP_ID, null, 0, 0, 0);
+				} catch (final SendIntentException ignored) {
+				}
+			}
+		});
 	}
 
 	public void displayErrorDialog(final int errorCode) {
 		runOnUiThread(new Runnable() {
 
-            @Override
-            public void run() {
-                AlertDialog.Builder builder = new AlertDialog.Builder(
-                        XmppActivity.this);
-                builder.setIconAttribute(android.R.attr.alertDialogIcon);
-                builder.setTitle(getString(R.string.error));
-                builder.setMessage(errorCode);
-                builder.setNeutralButton(R.string.accept, null);
-                builder.create().show();
-            }
-        });
+			@Override
+			public void run() {
+				AlertDialog.Builder builder = new AlertDialog.Builder(
+						XmppActivity.this);
+				builder.setIconAttribute(android.R.attr.alertDialogIcon);
+				builder.setTitle(getString(R.string.error));
+				builder.setMessage(errorCode);
+				builder.setNeutralButton(R.string.accept, null);
+				builder.create().show();
+			}
+		});
 
 	}
 
@@ -503,9 +597,9 @@ public abstract class XmppActivity extends Activity {
 					public void onClick(DialogInterface dialog, int which) {
 						if (xmppConnectionServiceBound) {
 							xmppConnectionService.sendPresencePacket(contact
-                                    .getAccount(), xmppConnectionService
-                                    .getPresenceGenerator()
-                                    .requestPresenceUpdatesFrom(contact));
+									.getAccount(), xmppConnectionService
+									.getPresenceGenerator()
+									.requestPresenceUpdatesFrom(contact));
 						}
 					}
 				});
@@ -571,6 +665,151 @@ public abstract class XmppActivity extends Activity {
 		builder.create().show();
 	}
 
+	protected boolean addFingerprintRow(LinearLayout keys, final Account account, final String fingerprint, boolean highlight, View.OnClickListener onKeyClickedListener) {
+		final XmppAxolotlSession.Trust trust = account.getAxolotlService()
+				.getFingerprintTrust(fingerprint);
+		if (trust == null) {
+			return false;
+		}
+		return addFingerprintRowWithListeners(keys, account, fingerprint, highlight, trust, true,
+				new CompoundButton.OnCheckedChangeListener() {
+					@Override
+					public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+						account.getAxolotlService().setFingerprintTrust(fingerprint,
+								(isChecked) ? XmppAxolotlSession.Trust.TRUSTED :
+										XmppAxolotlSession.Trust.UNTRUSTED);
+					}
+				},
+				new View.OnClickListener() {
+					@Override
+					public void onClick(View v) {
+						account.getAxolotlService().setFingerprintTrust(fingerprint,
+								XmppAxolotlSession.Trust.UNTRUSTED);
+						v.setEnabled(true);
+					}
+				},
+				onKeyClickedListener
+
+		);
+	}
+
+	protected boolean addFingerprintRowWithListeners(LinearLayout keys, final Account account,
+	                                                 final String fingerprint,
+	                                                 boolean highlight,
+	                                                 XmppAxolotlSession.Trust trust,
+	                                                 boolean showTag,
+	                                                 CompoundButton.OnCheckedChangeListener
+			                                                 onCheckedChangeListener,
+	                                                 View.OnClickListener onClickListener,
+													 View.OnClickListener onKeyClickedListener) {
+		if (trust == XmppAxolotlSession.Trust.COMPROMISED) {
+			return false;
+		}
+		View view = getLayoutInflater().inflate(R.layout.contact_key, keys, false);
+		TextView key = (TextView) view.findViewById(R.id.key);
+		key.setOnClickListener(onKeyClickedListener);
+		TextView keyType = (TextView) view.findViewById(R.id.key_type);
+		keyType.setOnClickListener(onKeyClickedListener);
+		Switch trustToggle = (Switch) view.findViewById(R.id.tgl_trust);
+		trustToggle.setVisibility(View.VISIBLE);
+		trustToggle.setOnCheckedChangeListener(onCheckedChangeListener);
+		trustToggle.setOnClickListener(onClickListener);
+		final View.OnLongClickListener purge = new View.OnLongClickListener() {
+			@Override
+			public boolean onLongClick(View v) {
+				showPurgeKeyDialog(account, fingerprint);
+				return true;
+			}
+		};
+		view.setOnLongClickListener(purge);
+		key.setOnLongClickListener(purge);
+		keyType.setOnLongClickListener(purge);
+		boolean x509 = trust == XmppAxolotlSession.Trust.TRUSTED_X509 || trust == XmppAxolotlSession.Trust.INACTIVE_TRUSTED_X509;
+		switch (trust) {
+			case UNTRUSTED:
+			case TRUSTED:
+			case TRUSTED_X509:
+				trustToggle.setChecked(trust.trusted(), false);
+				trustToggle.setEnabled(trust != XmppAxolotlSession.Trust.TRUSTED_X509);
+				if (trust == XmppAxolotlSession.Trust.TRUSTED_X509) {
+					trustToggle.setOnClickListener(null);
+				}
+				key.setTextColor(getPrimaryTextColor());
+				keyType.setTextColor(getSecondaryTextColor());
+				break;
+			case UNDECIDED:
+				trustToggle.setChecked(false, false);
+				trustToggle.setEnabled(false);
+				key.setTextColor(getPrimaryTextColor());
+				keyType.setTextColor(getSecondaryTextColor());
+				break;
+			case INACTIVE_UNTRUSTED:
+			case INACTIVE_UNDECIDED:
+				trustToggle.setOnClickListener(null);
+				trustToggle.setChecked(false, false);
+				trustToggle.setEnabled(false);
+				key.setTextColor(getTertiaryTextColor());
+				keyType.setTextColor(getTertiaryTextColor());
+				break;
+			case INACTIVE_TRUSTED:
+			case INACTIVE_TRUSTED_X509:
+				trustToggle.setOnClickListener(null);
+				trustToggle.setChecked(true, false);
+				trustToggle.setEnabled(false);
+				key.setTextColor(getTertiaryTextColor());
+				keyType.setTextColor(getTertiaryTextColor());
+				break;
+		}
+
+		if (showTag) {
+			keyType.setText(getString(x509 ? R.string.omemo_fingerprint_x509 : R.string.omemo_fingerprint));
+		} else {
+			keyType.setVisibility(View.GONE);
+		}
+		if (highlight) {
+			keyType.setTextColor(getResources().getColor(R.color.accent));
+			keyType.setText(getString(x509 ? R.string.omemo_fingerprint_x509_selected_message : R.string.omemo_fingerprint_selected_message));
+		} else {
+			keyType.setText(getString(x509 ? R.string.omemo_fingerprint_x509 : R.string.omemo_fingerprint));
+		}
+
+		key.setText(CryptoHelper.prettifyFingerprint(fingerprint.substring(2)));
+		keys.addView(view);
+		return true;
+	}
+
+	public void showPurgeKeyDialog(final Account account, final String fingerprint) {
+		Builder builder = new Builder(this);
+		builder.setTitle(getString(R.string.purge_key));
+		builder.setIconAttribute(android.R.attr.alertDialogIcon);
+		builder.setMessage(getString(R.string.purge_key_desc_part1)
+				+ "\n\n" + CryptoHelper.prettifyFingerprint(fingerprint.substring(2))
+				+ "\n\n" + getString(R.string.purge_key_desc_part2));
+		builder.setNegativeButton(getString(R.string.cancel), null);
+		builder.setPositiveButton(getString(R.string.accept),
+				new DialogInterface.OnClickListener() {
+					@Override
+					public void onClick(DialogInterface dialog, int which) {
+						account.getAxolotlService().purgeKey(fingerprint);
+						refreshUi();
+					}
+				});
+		builder.create().show();
+	}
+
+	public boolean hasStoragePermission(int requestCode) {
+		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+			if (checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
+				requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, requestCode);
+				return false;
+			} else {
+				return true;
+			}
+		} else {
+			return true;
+		}
+	}
+
 	public void selectPresence(final Conversation conversation,
 			final OnPresenceSelected listener) {
 		final Contact contact = conversation.getContact();
@@ -690,6 +929,10 @@ public abstract class XmppActivity extends Activity {
 		}
 	};
 
+	public int getTertiaryTextColor() {
+		return this.mTertiaryTextColor;
+	}
+
 	public int getSecondaryTextColor() {
 		return this.mSecondaryTextColor;
 	}
@@ -737,7 +980,7 @@ public abstract class XmppActivity extends Activity {
 				@Override
 				public NdefMessage createNdefMessage(NfcEvent nfcEvent) {
 					return new NdefMessage(new NdefRecord[]{
-						NdefRecord.createUri(getShareableUri()),
+							NdefRecord.createUri(getShareableUri()),
 							NdefRecord.createApplicationRecord("de.thedevstack.conversationsplus")
 					});
 				}
@@ -818,6 +1061,15 @@ public abstract class XmppActivity extends Activity {
 		}
 	}
 
+	protected Account extractAccount(Intent intent) {
+		String jid = intent != null ? intent.getStringExtra(EXTRA_ACCOUNT) : null;
+		try {
+			return jid != null ? xmppConnectionService.findAccountByJid(Jid.fromString(jid)) : null;
+		} catch (InvalidJidException e) {
+			return null;
+		}
+	}
+
 	public static class ConferenceInvite {
 		private String uuid;
 		private List<Jid> jids = new ArrayList<>();
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/adapter/AccountAdapter.java b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/AccountAdapter.java
index 6195f47b..eb0344bc 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/adapter/AccountAdapter.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/AccountAdapter.java
@@ -1,12 +1,5 @@
 package de.thedevstack.conversationsplus.ui.adapter;
 
-import java.util.List;
-
-import de.thedevstack.conversationsplus.R;
-import de.thedevstack.conversationsplus.entities.Account;
-import de.thedevstack.conversationsplus.services.AvatarService;
-import de.thedevstack.conversationsplus.ui.XmppActivity;
-import de.thedevstack.conversationsplus.ui.ManageAccountActivity;
 import android.content.Context;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -15,7 +8,16 @@ import android.widget.ArrayAdapter;
 import android.widget.CompoundButton;
 import android.widget.ImageView;
 import android.widget.TextView;
-import android.widget.Switch;
+
+import java.util.List;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.services.AvatarService;
+import de.thedevstack.conversationsplus.ui.ManageAccountActivity;
+import de.thedevstack.conversationsplus.ui.XmppActivity;
+import de.thedevstack.conversationsplus.ui.widget.Switch;
 
 public class AccountAdapter extends ArrayAdapter<Account> {
 
@@ -35,7 +37,11 @@ public class AccountAdapter extends ArrayAdapter<Account> {
 			view = inflater.inflate(R.layout.account_row, parent, false);
 		}
 		TextView jid = (TextView) view.findViewById(R.id.account_jid);
-		jid.setText(account.getJid().toBareJid().toString());
+		if (Config.DOMAIN_LOCK != null) {
+			jid.setText(account.getJid().getLocalpart());
+		} else {
+			jid.setText(account.getJid().toBareJid().toString());
+		}
 		TextView statusView = (TextView) view.findViewById(R.id.account_status);
 		ImageView imageView = (ImageView) view.findViewById(R.id.account_image);
 		imageView.setImageBitmap(AvatarService.getInstance().get(account, activity.getPixel(48)));
@@ -54,8 +60,7 @@ public class AccountAdapter extends ArrayAdapter<Account> {
 		}
 		final Switch tglAccountState = (Switch) view.findViewById(R.id.tgl_account_status);
 		final boolean isDisabled = (account.getStatus() == Account.State.DISABLED);
-		tglAccountState.setOnCheckedChangeListener(null);
-		tglAccountState.setChecked(!isDisabled);
+		tglAccountState.setChecked(!isDisabled,false);
 		tglAccountState.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
 			@Override
 			public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/adapter/ConversationAdapter.java b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/ConversationAdapter.java
index 590a6cfd..ab131cd0 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/adapter/ConversationAdapter.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/ConversationAdapter.java
@@ -20,20 +20,17 @@ import java.lang.ref.WeakReference;
 import java.util.List;
 import java.util.concurrent.RejectedExecutionException;
 
-import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
-import de.thedevstack.conversationsplus.services.AvatarService;
 import de.thedevstack.conversationsplus.ui.listeners.ShowResourcesListDialogListener;
 import de.tzur.conversations.Settings;
 import de.thedevstack.conversationsplus.R;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Conversation;
-import de.thedevstack.conversationsplus.entities.Transferable;
 import de.thedevstack.conversationsplus.entities.Message;
-import de.thedevstack.conversationsplus.entities.Presences;
+import de.thedevstack.conversationsplus.entities.Transferable;
+import de.thedevstack.conversationsplus.services.AvatarService;
 import de.thedevstack.conversationsplus.ui.ConversationActivity;
 import de.thedevstack.conversationsplus.ui.XmppActivity;
 import de.thedevstack.conversationsplus.utils.UIHelper;
-import github.ankushsachdeva.emojicon.EmojiconTextView;
 
 public class ConversationAdapter extends ArrayAdapter<Conversation> {
 
@@ -60,14 +57,15 @@ public class ConversationAdapter extends ArrayAdapter<Conversation> {
             view.findViewById(R.id.conversationListRowFrame).setBackgroundColor(c);
 		}
 		TextView convName = (TextView) view.findViewById(R.id.conversation_name);
-		if (conversation.getMode() == Conversation.MODE_SINGLE || ConversationsPlusPreferences.useSubject()) {
+		if (conversation.getMode() == Conversation.MODE_SINGLE || activity.useSubjectToIdentifyConference()) {
 			convName.setText(conversation.getName());
 		} else {
 			convName.setText(conversation.getJid().toBareJid().toString());
 		}
-		EmojiconTextView mLastMessage = (EmojiconTextView) view.findViewById(R.id.conversation_lastmsg);
+		TextView mLastMessage = (TextView) view.findViewById(R.id.conversation_lastmsg);
 		TextView mTimestamp = (TextView) view.findViewById(R.id.conversation_lastupdate);
 		ImageView imagePreview = (ImageView) view.findViewById(R.id.conversation_lastimage);
+		ImageView notificationStatus = (ImageView) view.findViewById(R.id.notification_status);
 
         if (Settings.SHOW_ONLINE_STATUS && conversation.getAccount().getStatus() == Account.State.ONLINE) {
             TextView status = (TextView) view.findViewById(R.id.status);
@@ -75,15 +73,15 @@ public class ConversationAdapter extends ArrayAdapter<Conversation> {
             String color = "#000000";
             if (conversation.getMode() == Conversation.MODE_SINGLE) {
                 switch (conversation.getContact().getMostAvailableStatus()) {
-                    case Presences.ONLINE:
-                    case Presences.CHAT:
+                    case ONLINE:
+                    case CHAT:
                         color = "#259B23";
                         break;
-                    case Presences.AWAY:
-                    case Presences.XA:
+                    case AWAY:
+                    case XA:
                         color = "#FF9800";
                         break;
-                    case Presences.DND:
+                    case DND:
                         color = "#E51C23";
                         break;
                 }
@@ -113,7 +111,7 @@ public class ConversationAdapter extends ArrayAdapter<Conversation> {
 			imagePreview.setVisibility(View.GONE);
             CharSequence msgText = preview.first;
             String msgPrefix = null;
-			if (message.getStatus() == Message.STATUS_SEND
+            if (message.getStatus() == Message.STATUS_SEND
                     || message.getStatus() == Message.STATUS_SEND_DISPLAYED
                     || message.getStatus() == Message.STATUS_SEND_FAILED
                     || message.getStatus() == Message.STATUS_SEND_RECEIVED) {
@@ -122,7 +120,7 @@ public class ConversationAdapter extends ArrayAdapter<Conversation> {
                 msgPrefix = UIHelper.getMessageDisplayName(message);
             }
             String lastMessagePreview = ((null == msgPrefix || msgPrefix.isEmpty()) ? "" : (msgPrefix + ": ")) + msgText;
-			mLastMessage.setText(lastMessagePreview);
+            mLastMessage.setText(lastMessagePreview);
 			if (preview.second) {
 				if (conversation.isRead()) {
 					mLastMessage.setTypeface(null, Typeface.ITALIC);
@@ -138,6 +136,20 @@ public class ConversationAdapter extends ArrayAdapter<Conversation> {
 			}
 		}
 
+		long muted_till = conversation.getLongAttribute(Conversation.ATTRIBUTE_MUTED_TILL,0);
+		if (muted_till == Long.MAX_VALUE) {
+			notificationStatus.setVisibility(View.VISIBLE);
+			notificationStatus.setImageResource(R.drawable.ic_notifications_off_grey600_24dp);
+		} else if (muted_till >= System.currentTimeMillis()) {
+			notificationStatus.setVisibility(View.VISIBLE);
+			notificationStatus.setImageResource(R.drawable.ic_notifications_paused_grey600_24dp);
+		} else if (conversation.alwaysNotify()) {
+			notificationStatus.setVisibility(View.GONE);
+		} else {
+			notificationStatus.setVisibility(View.VISIBLE);
+			notificationStatus.setImageResource(R.drawable.ic_notifications_none_grey600_24dp);
+		}
+
 		mTimestamp.setText(UIHelper.readableTimeDifference(activity, message.getTimeSent()));
 		ImageView profilePicture = (ImageView) view.findViewById(R.id.conversation_image);
 		profilePicture.setOnLongClickListener(new ShowResourcesListDialogListener(activity, conversation.getContact()));
@@ -228,4 +240,4 @@ public class ConversationAdapter extends ArrayAdapter<Conversation> {
 			return bitmapWorkerTaskReference.get();
 		}
 	}
-}
+}
\ No newline at end of file
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/adapter/KnownHostsAdapter.java b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/KnownHostsAdapter.java
index 7bca0aa6..41973089 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/adapter/KnownHostsAdapter.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/KnownHostsAdapter.java
@@ -1,13 +1,13 @@
 package de.thedevstack.conversationsplus.ui.adapter;
 
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Locale;
-
 import android.content.Context;
 import android.widget.ArrayAdapter;
 import android.widget.Filter;
 
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+
 public class KnownHostsAdapter extends ArrayAdapter<String> {
 	private ArrayList<String> domains;
 	private Filter domainFilter = new Filter() {
@@ -15,7 +15,7 @@ public class KnownHostsAdapter extends ArrayAdapter<String> {
 		@Override
 		protected FilterResults performFiltering(CharSequence constraint) {
 			if (constraint != null) {
-				ArrayList<String> suggestions = new ArrayList<String>();
+				ArrayList<String> suggestions = new ArrayList<>();
 				final String[] split = constraint.toString().split("@");
 				if (split.length == 1) {
 					for (String domain : domains) {
@@ -58,10 +58,9 @@ public class KnownHostsAdapter extends ArrayAdapter<String> {
 		}
 	};
 
-	public KnownHostsAdapter(Context context, int viewResourceId,
-			List<String> mKnownHosts) {
+	public KnownHostsAdapter(Context context, int viewResourceId, List<String> mKnownHosts) {
 		super(context, viewResourceId, new ArrayList<String>());
-		domains = new ArrayList<String>(mKnownHosts);
+		domains = new ArrayList<>(mKnownHosts);
 	}
 
 	@Override
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/adapter/ListItemAdapter.java b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/ListItemAdapter.java
index 4ecebd84..a67f5bcd 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/adapter/ListItemAdapter.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/ListItemAdapter.java
@@ -1,18 +1,5 @@
 package de.thedevstack.conversationsplus.ui.adapter;
 
-import java.lang.ref.WeakReference;
-import java.util.List;
-import java.util.concurrent.RejectedExecutionException;
-
-import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
-import de.thedevstack.conversationsplus.services.AvatarService;
-import de.tzur.conversations.Settings;
-import de.thedevstack.conversationsplus.R;
-import de.thedevstack.conversationsplus.entities.ListItem;
-import de.thedevstack.conversationsplus.ui.XmppActivity;
-import de.thedevstack.conversationsplus.utils.UIHelper;
-import de.thedevstack.conversationsplus.xmpp.jid.Jid;
-
 import android.content.Context;
 import android.content.res.Resources;
 import android.graphics.Bitmap;
@@ -27,6 +14,18 @@ import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.TextView;
 
+import java.lang.ref.WeakReference;
+import java.util.List;
+import java.util.concurrent.RejectedExecutionException;
+
+import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
+import de.tzur.conversations.Settings;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.ListItem;
+import de.thedevstack.conversationsplus.services.AvatarService;
+import de.thedevstack.conversationsplus.ui.XmppActivity;
+import de.thedevstack.conversationsplus.utils.UIHelper;
+
 public class ListItemAdapter extends ArrayAdapter<ListItem> {
 
 	protected XmppActivity activity;
@@ -82,11 +81,12 @@ public class ListItemAdapter extends ArrayAdapter<ListItem> {
 				tagLayout.addView(tv);
 			}
 		}
-		final Jid jid = item.getJid();
+		final String jid = item.getDisplayJid();
 		if (jid != null) {
-			tvJid.setText(jid.toString());
+			tvJid.setVisibility(View.VISIBLE);
+			tvJid.setText(jid);
 		} else {
-			tvJid.setText("");
+			tvJid.setVisibility(View.GONE);
 		}
 		tvName.setText(item.getDisplayName());
 		loadAvatar(item,picture);
@@ -98,7 +98,7 @@ public class ListItemAdapter extends ArrayAdapter<ListItem> {
 	}
 
 	public interface OnTagClickedListener {
-		public void onTagClicked(String tag);
+		void onTagClicked(String tag);
 	}
 
 	class BitmapWorkerTask extends AsyncTask<ListItem, Void, Bitmap> {
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/adapter/MessageAdapter.java b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/MessageAdapter.java
index 647ef68d..6a141f11 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/adapter/MessageAdapter.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/MessageAdapter.java
@@ -1,16 +1,24 @@
 package de.thedevstack.conversationsplus.ui.adapter;
 
+import android.content.ActivityNotFoundException;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
+import android.content.res.Resources;
+import android.graphics.Bitmap;
 import android.graphics.Typeface;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
 import android.net.Uri;
+import android.os.AsyncTask;
 import android.text.Spannable;
 import android.text.SpannableString;
 import android.text.Spanned;
 import android.text.style.ForegroundColorSpan;
 import android.text.style.RelativeSizeSpan;
 import android.text.style.StyleSpan;
+import android.util.DisplayMetrics;
+import android.util.Patterns;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.View.OnLongClickListener;
@@ -22,32 +30,38 @@ import android.widget.LinearLayout;
 import android.widget.TextView;
 import android.widget.Toast;
 
+import java.lang.ref.WeakReference;
 import java.util.List;
+import java.util.concurrent.RejectedExecutionException;
+import java.util.regex.Matcher;
 
 import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
 import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.crypto.axolotl.XmppAxolotlSession;
 import de.thedevstack.conversationsplus.entities.Account;
-import de.thedevstack.conversationsplus.entities.Contact;
 import de.thedevstack.conversationsplus.entities.Conversation;
-import de.thedevstack.conversationsplus.entities.Transferable;
 import de.thedevstack.conversationsplus.entities.DownloadableFile;
 import de.thedevstack.conversationsplus.entities.Message;
 import de.thedevstack.conversationsplus.entities.Message.FileParams;
+import de.thedevstack.conversationsplus.entities.Transferable;
 import de.thedevstack.conversationsplus.persistance.FileBackend;
 import de.thedevstack.conversationsplus.services.AvatarService;
 import de.thedevstack.conversationsplus.ui.ConversationActivity;
+import de.thedevstack.conversationsplus.utils.CryptoHelper;
 import de.thedevstack.conversationsplus.utils.GeoHelper;
 import de.thedevstack.conversationsplus.utils.UIHelper;
-import github.ankushsachdeva.emojicon.EmojiconTextView;
 
 public class MessageAdapter extends ArrayAdapter<Message> {
 
 	private static final int SENT = 0;
 	private static final int RECEIVED = 1;
 	private static final int STATUS = 2;
+	private static final int NULL = 3;
 
 	private ConversationActivity activity;
 
+	private DisplayMetrics metrics;
+
 	private OnContactPictureClicked mOnContactPictureClickedListener;
 	private OnContactPictureLongClicked mOnContactPictureLongClickedListener;
 
@@ -63,6 +77,7 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 	public MessageAdapter(ConversationActivity activity, List<Message> messages) {
 		super(activity, 0, messages);
 		this.activity = activity;
+		metrics = getContext().getResources().getDisplayMetrics();
 	}
 
 	public void setOnContactPictureClicked(OnContactPictureClicked listener) {
@@ -79,24 +94,37 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 		return 3;
 	}
 
-	@Override
-	public int getItemViewType(int position) {
-		if (getItem(position).getType() == Message.TYPE_STATUS) {
+	public int getItemViewType(Message message) {
+		if (message.getType() == Message.TYPE_STATUS) {
 			return STATUS;
-		} else if (getItem(position).getStatus() <= Message.STATUS_RECEIVED) {
+		} else if (message.getStatus() <= Message.STATUS_RECEIVED) {
 			return RECEIVED;
+		}
+
+		return SENT;
+	}
+
+	@Override
+	public int getItemViewType(int position) {
+		return this.getItemViewType(getItem(position));
+	}
+
+	private int getMessageTextColor(boolean onDark, boolean primary) {
+		if (onDark) {
+			return activity.getResources().getColor(primary ? R.color.white : R.color.white70);
 		} else {
-			return SENT;
+			return activity.getResources().getColor(primary ? R.color.black87 : R.color.black54);
 		}
 	}
 
-	private void displayStatus(ViewHolder viewHolder, Message message) {
+	private void displayStatus(ViewHolder viewHolder, Message message, int type, boolean darkBackground) {
 		String filesize = null;
 		String info = null;
 		boolean error = false;
 		if (viewHolder.indicatorReceived != null) {
 			viewHolder.indicatorReceived.setVisibility(View.GONE);
 		}
+
 		boolean multiReceived = message.getConversation().getMode() == Conversation.MODE_MULTI
 			&& message.getMergedStatus() <= Message.STATUS_RECEIVED;
 		if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE || message.getTransferable() != null) {
@@ -145,15 +173,40 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 				}
 				break;
 		}
-		if (error) {
+		if (error && type == SENT) {
 			viewHolder.time.setTextColor(activity.getWarningTextColor());
 		} else {
-			viewHolder.time.setTextColor(activity.getSecondaryTextColor());
+			viewHolder.time.setTextColor(this.getMessageTextColor(darkBackground,false));
 		}
 		if (message.getEncryption() == Message.ENCRYPTION_NONE) {
 			viewHolder.indicator.setVisibility(View.GONE);
 		} else {
+			viewHolder.indicator.setImageResource(darkBackground ? R.drawable.ic_lock_white_18dp : R.drawable.ic_lock_black_18dp);
 			viewHolder.indicator.setVisibility(View.VISIBLE);
+			if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
+				XmppAxolotlSession.Trust trust = message.getConversation()
+						.getAccount().getAxolotlService().getFingerprintTrust(
+								message.getAxolotlFingerprint());
+
+				if(trust == null || (!trust.trusted() && !trust.trustedInactive())) {
+					viewHolder.indicator.setColorFilter(activity.getWarningTextColor());
+					viewHolder.indicator.setAlpha(1.0f);
+				} else {
+					viewHolder.indicator.clearColorFilter();
+					if (darkBackground) {
+						viewHolder.indicator.setAlpha(0.7f);
+					} else {
+						viewHolder.indicator.setAlpha(0.57f);
+					}
+				}
+			} else {
+				viewHolder.indicator.clearColorFilter();
+				if (darkBackground) {
+					viewHolder.indicator.setAlpha(0.7f);
+				} else {
+					viewHolder.indicator.setAlpha(0.57f);
+				}
+			}
 		}
 
 		String formatedTime = UIHelper.readableTimeDifferenceFull(getContext(),
@@ -185,45 +238,32 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 		}
 	}
 
-	private void displayInfoMessage(ViewHolder viewHolder, String text) {
+	private void displayInfoMessage(ViewHolder viewHolder, String text, boolean darkBackground) {
 		if (viewHolder.download_button != null) {
 			viewHolder.download_button.setVisibility(View.GONE);
 		}
 		viewHolder.image.setVisibility(View.GONE);
 		viewHolder.messageBody.setVisibility(View.VISIBLE);
 		viewHolder.messageBody.setText(text);
-		viewHolder.messageBody.setTextColor(activity.getSecondaryTextColor());
+		viewHolder.messageBody.setTextColor(getMessageTextColor(darkBackground, false));
 		viewHolder.messageBody.setTypeface(null, Typeface.ITALIC);
 		viewHolder.messageBody.setTextIsSelectable(false);
 	}
 
-	private void displayDecryptionFailed(ViewHolder viewHolder) {
+	private void displayDecryptionFailed(ViewHolder viewHolder, boolean darkBackground) {
 		if (viewHolder.download_button != null) {
 			viewHolder.download_button.setVisibility(View.GONE);
 		}
 		viewHolder.image.setVisibility(View.GONE);
 		viewHolder.messageBody.setVisibility(View.VISIBLE);
 		viewHolder.messageBody.setText(getContext().getString(
-                R.string.decryption_failed));
-		viewHolder.messageBody.setTextColor(activity.getWarningTextColor());
+				R.string.decryption_failed));
+		viewHolder.messageBody.setTextColor(getMessageTextColor(darkBackground, false));
 		viewHolder.messageBody.setTypeface(null, Typeface.NORMAL);
 		viewHolder.messageBody.setTextIsSelectable(false);
 	}
 
-	private void displayHeartMessage(final ViewHolder viewHolder, final String body) {
-		if (viewHolder.download_button != null) {
-			viewHolder.download_button.setVisibility(View.GONE);
-		}
-		viewHolder.image.setVisibility(View.GONE);
-		viewHolder.messageBody.setVisibility(View.VISIBLE);
-		viewHolder.messageBody.setIncludeFontPadding(false);
-		Spannable span = new SpannableString(body);
-		span.setSpan(new RelativeSizeSpan(4.0f), 0, body.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
-		span.setSpan(new ForegroundColorSpan(activity.getWarningTextColor()), 0, body.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
-		viewHolder.messageBody.setText(span);
-	}
-
-	private void displayTextMessage(final ViewHolder viewHolder, final Message message) {
+	private void displayTextMessage(final ViewHolder viewHolder, final Message message, boolean darkBackground) {
 		if (viewHolder.download_button != null) {
 			viewHolder.download_button.setVisibility(View.GONE);
 		}
@@ -232,7 +272,12 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 		viewHolder.messageBody.setIncludeFontPadding(true);
 		if (message.getBody() != null) {
 			final String nick = UIHelper.getMessageDisplayName(message);
-			final String body = message.getMergedBody().replaceAll("^" + Message.ME_COMMAND,nick + " ");
+			String body;
+			try {
+				body = message.getMergedBody().replaceAll("^" + Message.ME_COMMAND, nick + " ");
+			} catch (ArrayIndexOutOfBoundsException e) {
+				body = message.getMergedBody();
+			}
 			final SpannableString formattedBody = new SpannableString(body);
 			int i = body.indexOf(Message.MERGE_SEPARATOR);
 			while(i >= 0) {
@@ -241,14 +286,13 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 				i = body.indexOf(Message.MERGE_SEPARATOR,end);
 			}
 			if (message.getType() != Message.TYPE_PRIVATE) {
-
 				if (message.hasMeCommand()) {
 					final Spannable span = new SpannableString(formattedBody);
 					span.setSpan(new StyleSpan(Typeface.BOLD_ITALIC), 0, nick.length(),
 							Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 					viewHolder.messageBody.setText(span);
 				} else {
-                    viewHolder.messageBody.setText(formattedBody);
+					viewHolder.messageBody.setText(formattedBody);
 				}
 			} else {
 				String privateMarker;
@@ -266,8 +310,7 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 				}
 				final Spannable span = new SpannableString(privateMarker + " "
 						+ formattedBody);
-				span.setSpan(new ForegroundColorSpan(activity
-							.getSecondaryTextColor()), 0, privateMarker
+				span.setSpan(new ForegroundColorSpan(getMessageTextColor(darkBackground,false)), 0, privateMarker
 						.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 				span.setSpan(new StyleSpan(Typeface.BOLD), 0,
 						privateMarker.length(),
@@ -279,12 +322,21 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 				}
 				viewHolder.messageBody.setText(span);
 			}
+			int urlCount = 0;
+			Matcher matcher = Patterns.WEB_URL.matcher(body);
+			while (matcher.find()) {
+				urlCount++;
+			}
+			viewHolder.messageBody.setTextIsSelectable(urlCount <= 1);
 		} else {
 			viewHolder.messageBody.setText("");
+			viewHolder.messageBody.setTextIsSelectable(false);
 		}
-		viewHolder.messageBody.setTextColor(activity.getPrimaryTextColor());
+		viewHolder.messageBody.setTextColor(this.getMessageTextColor(darkBackground, true));
+		viewHolder.messageBody.setLinkTextColor(this.getMessageTextColor(darkBackground, true));
+		viewHolder.messageBody.setHighlightColor(activity.getResources().getColor(darkBackground ? R.color.grey800 : R.color.grey500));
 		viewHolder.messageBody.setTypeface(null, Typeface.NORMAL);
-		viewHolder.messageBody.setTextIsSelectable(true);
+		viewHolder.messageBody.setOnLongClickListener(openContextMenu);
 	}
 
 	private void displayDownloadableMessage(ViewHolder viewHolder,
@@ -295,11 +347,11 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 		viewHolder.download_button.setText(text);
 		viewHolder.download_button.setOnClickListener(new OnClickListener() {
 
-            @Override
-            public void onClick(View v) {
-                startDownloadable(message);
-            }
-        });
+			@Override
+			public void onClick(View v) {
+				activity.startDownloadable(message);
+			}
+		});
 		viewHolder.download_button.setOnLongClickListener(openContextMenu);
 	}
 
@@ -352,25 +404,25 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 			scalledW = (int) target;
 			scalledH = (int) (params.height / ((double) params.width / target));
 		}
-		viewHolder.image.setLayoutParams(new LinearLayout.LayoutParams(
-                scalledW, scalledH));*/
+		LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(scalledW, scalledH);
+		layoutParams.setMargins(0, (int) (metrics.density * 4), 0, (int) (metrics.density * 4));
+		viewHolder.image.setLayoutParams(layoutParams);*/
         //TODO Why should this be calculated by hand???
 		activity.loadBitmap(message, viewHolder.image, true);
-        viewHolder.image.setOnClickListener(new OnClickListener() {
-
-            @Override
-            public void onClick(View v) {
-                Intent intent = new Intent(Intent.ACTION_VIEW);
-                intent.setDataAndType(FileBackend.getJingleFileUri(message), "image/*");
-                getContext().startActivity(intent);
-            }
-        });
+		viewHolder.image.setOnClickListener(new OnClickListener() {
+
+			@Override
+			public void onClick(View v) {
+				openDownloadable(message);
+			}
+		});
 		viewHolder.image.setOnLongClickListener(openContextMenu);
 	}
 
 	@Override
 	public View getView(int position, View view, ViewGroup parent) {
 		final Message message = getItem(position);
+		final boolean isInValidSession = message.isValidInSession();
 		final Conversation conversation = message.getConversation();
 		final Account account = conversation.getAccount();
 		final int type = getItemViewType(position);
@@ -391,7 +443,7 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 						.findViewById(R.id.security_indicator);
 					viewHolder.image = (ImageView) view
 						.findViewById(R.id.message_image);
-					viewHolder.messageBody = (EmojiconTextView) view
+					viewHolder.messageBody = (TextView) view
 						.findViewById(R.id.message_body);
 					viewHolder.time = (TextView) view
 						.findViewById(R.id.message_time);
@@ -411,12 +463,13 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 						.findViewById(R.id.security_indicator);
 					viewHolder.image = (ImageView) view
 						.findViewById(R.id.message_image);
-					viewHolder.messageBody = (EmojiconTextView) view
+					viewHolder.messageBody = (TextView) view
 						.findViewById(R.id.message_body);
 					viewHolder.time = (TextView) view
 						.findViewById(R.id.message_time);
 					viewHolder.indicatorReceived = (ImageView) view
 						.findViewById(R.id.indicator_received);
+					viewHolder.encryption = (TextView) view.findViewById(R.id.message_encryption);
 					break;
 				case STATUS:
 					view = activity.getLayoutInflater().inflate(R.layout.message_status, parent, false);
@@ -435,25 +488,20 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 			}
 		}
 
+		boolean darkBackground = (type == RECEIVED && !isInValidSession);
+
 		if (type == STATUS) {
+			viewHolder.status_message.setVisibility(View.VISIBLE);
+			viewHolder.contact_picture.setVisibility(View.VISIBLE);
 			if (conversation.getMode() == Conversation.MODE_SINGLE) {
-				viewHolder.contact_picture.setImageBitmap(AvatarService.getInstance().get(conversation.getContact(),
-							activity.getPixel(32)));
+			viewHolder.contact_picture.setImageBitmap(AvatarService.getInstance().get(conversation.getContact(),
+						activity.getPixel(32)));
 				viewHolder.contact_picture.setAlpha(0.5f);
-				viewHolder.status_message.setText(message.getBody());
 			}
+			viewHolder.status_message.setText(message.getBody());
 			return view;
-		} else if (type == RECEIVED) {
-			Contact contact = message.getContact();
-			if (contact != null) {
-				viewHolder.contact_picture.setImageBitmap(AvatarService.getInstance().get(contact, activity.getPixel(48)));
-			} else if (conversation.getMode() == Conversation.MODE_MULTI) {
-				viewHolder.contact_picture.setImageBitmap(AvatarService.getInstance().get(
-						UIHelper.getMessageDisplayName(message),
-						activity.getPixel(48)));
-			}
-		} else if (type == SENT) {
-			viewHolder.contact_picture.setImageBitmap(AvatarService.getInstance().get(account, activity.getPixel(48)));
+		} else {
+			loadAvatar(message, viewHolder.contact_picture);
 		}
 
 		viewHolder.contact_picture
@@ -463,7 +511,7 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 				public void onClick(View v) {
 					if (MessageAdapter.this.mOnContactPictureClickedListener != null) {
 						MessageAdapter.this.mOnContactPictureClickedListener
-							.onContactPictureClicked(message);
+								.onContactPictureClicked(message);
 					}
 
 				}
@@ -475,7 +523,7 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 				public boolean onLongClick(View v) {
 					if (MessageAdapter.this.mOnContactPictureLongClickedListener != null) {
 						MessageAdapter.this.mOnContactPictureLongClickedListener
-							.onContactPictureLongClicked(message);
+								.onContactPictureLongClicked(message);
 						return true;
 					} else {
 						return false;
@@ -490,7 +538,7 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 			} else if (transferable.getStatus() == Transferable.STATUS_OFFER_CHECK_FILESIZE) {
 				displayDownloadableMessage(viewHolder, message, activity.getString(R.string.check_x_filesize, UIHelper.getFileDescriptionString(activity, message)));
 			} else {
-				displayInfoMessage(viewHolder, UIHelper.getMessagePreview(activity, message).first);
+				displayInfoMessage(viewHolder, UIHelper.getMessagePreview(activity, message).first,darkBackground);
 			}
 		} else if (message.getType() == Message.TYPE_IMAGE && message.getEncryption() != Message.ENCRYPTION_PGP && message.getEncryption() != Message.ENCRYPTION_DECRYPTION_FAILED) {
 			displayImageMessage(viewHolder, message);
@@ -502,10 +550,13 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 			}
 		} else if (message.getEncryption() == Message.ENCRYPTION_PGP) {
 			if (activity.hasPgp()) {
-				displayInfoMessage(viewHolder,activity.getString(R.string.encrypted_message));
+				if (account.getPgpDecryptionService().isRunning()) {
+					displayInfoMessage(viewHolder, activity.getString(R.string.message_decrypting), darkBackground);
+				} else {
+					displayInfoMessage(viewHolder, activity.getString(R.string.pgp_message), darkBackground);
+				}
 			} else {
-				displayInfoMessage(viewHolder,
-						activity.getString(R.string.install_openkeychain));
+				displayInfoMessage(viewHolder,activity.getString(R.string.install_openkeychain),darkBackground);
 				if (viewHolder != null) {
 					viewHolder.message_box
 						.setOnClickListener(new OnClickListener() {
@@ -518,32 +569,30 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 				}
 			}
 		} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTION_FAILED) {
-			displayDecryptionFailed(viewHolder);
+			displayDecryptionFailed(viewHolder,darkBackground);
 		} else {
 			if (GeoHelper.isGeoUri(message.getBody())) {
 				displayLocationMessage(viewHolder,message);
 			} else if (message.treatAsDownloadable() == Message.Decision.MUST) {
 				displayDownloadableMessage(viewHolder, message, activity.getString(R.string.check_x_filesize, UIHelper.getFileDescriptionString(activity, message)));
 			} else {
-				displayTextMessage(viewHolder, message);
+				displayTextMessage(viewHolder, message, darkBackground);
 			}
 		}
 
-		displayStatus(viewHolder, message);
-
-		return view;
-	}
-
-	public void startDownloadable(Message message) {
-		Transferable transferable = message.getTransferable();
-		if (transferable != null) {
-			if (!transferable.start()) {
-				Toast.makeText(activity, R.string.not_connected_try_again,
-						Toast.LENGTH_SHORT).show();
+		if (type == RECEIVED) {
+			if(isInValidSession) {
+				viewHolder.encryption.setVisibility(View.GONE);
+			} else {
+				viewHolder.message_box.setBackgroundResource(R.drawable.message_bubble_received_warning);
+				viewHolder.encryption.setVisibility(View.VISIBLE);
+				viewHolder.encryption.setText(CryptoHelper.encryptionTypeToText(message.getEncryption()));
 			}
-		} else if (message.treatAsDownloadable() != Message.Decision.NEVER) {
-			activity.xmppConnectionService.getHttpConnectionManager().createNewDownloadConnection(message);
 		}
+
+		displayStatus(viewHolder, message, type, darkBackground);
+
+		return view;
 	}
 
 	public void openDownloadable(Message message) {
@@ -553,14 +602,23 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 			return;
 		}
 		Intent openIntent = new Intent(Intent.ACTION_VIEW);
-		openIntent.setDataAndType(Uri.fromFile(file), file.getMimeType());
+		String mime = file.getMimeType();
+		if (mime == null) {
+			mime = "*/*";
+		}
+		openIntent.setDataAndType(Uri.fromFile(file), mime);
 		PackageManager manager = activity.getPackageManager();
 		List<ResolveInfo> infos = manager.queryIntentActivities(openIntent, 0);
-		if (infos.size() > 0) {
+		if (infos.size() == 0) {
+			openIntent.setDataAndType(Uri.fromFile(file),"*/*");
+		}
+		try {
 			getContext().startActivity(openIntent);
-		} else {
-			Toast.makeText(activity,R.string.no_application_found_to_open_file,Toast.LENGTH_SHORT).show();
+			return;
+		}  catch (ActivityNotFoundException e) {
+			//ignored
 		}
+		Toast.makeText(activity,R.string.no_application_found_to_open_file,Toast.LENGTH_SHORT).show();
 	}
 
 	public void showLocation(Message message) {
@@ -574,11 +632,11 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 	}
 
 	public interface OnContactPictureClicked {
-		public void onContactPictureClicked(Message message);
+		void onContactPictureClicked(Message message);
 	}
 
 	public interface OnContactPictureLongClicked {
-		public void onContactPictureLongClicked(Message message);
+		void onContactPictureLongClicked(Message message);
 	}
 
 	private static class ViewHolder {
@@ -589,8 +647,92 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 		protected ImageView indicator;
 		protected ImageView indicatorReceived;
 		protected TextView time;
-		protected EmojiconTextView messageBody;
+		protected TextView messageBody;
 		protected ImageView contact_picture;
 		protected TextView status_message;
+		protected TextView encryption;
+	}
+
+	class BitmapWorkerTask extends AsyncTask<Message, Void, Bitmap> {
+		private final WeakReference<ImageView> imageViewReference;
+		private Message message = null;
+
+		public BitmapWorkerTask(ImageView imageView) {
+			imageViewReference = new WeakReference<>(imageView);
+		}
+
+		@Override
+		protected Bitmap doInBackground(Message... params) {
+			return AvatarService.getInstance().get(params[0], activity.getPixel(48), isCancelled());
+		}
+
+		@Override
+		protected void onPostExecute(Bitmap bitmap) {
+			if (bitmap != null) {
+				final ImageView imageView = imageViewReference.get();
+				if (imageView != null) {
+					imageView.setImageBitmap(bitmap);
+					imageView.setBackgroundColor(0x00000000);
+				}
+			}
+		}
+	}
+
+	public void loadAvatar(Message message, ImageView imageView) {
+		if (cancelPotentialWork(message, imageView)) {
+			final Bitmap bm = AvatarService.getInstance().get(message, activity.getPixel(48), true);
+			if (bm != null) {
+				imageView.setImageBitmap(bm);
+				imageView.setBackgroundColor(0x00000000);
+			} else {
+				imageView.setBackgroundColor(UIHelper.getColorForName(UIHelper.getMessageDisplayName(message)));
+				imageView.setImageDrawable(null);
+				final BitmapWorkerTask task = new BitmapWorkerTask(imageView);
+				final AsyncDrawable asyncDrawable = new AsyncDrawable(activity.getResources(), null, task);
+				imageView.setImageDrawable(asyncDrawable);
+				try {
+					task.execute(message);
+				} catch (final RejectedExecutionException ignored) {
+				}
+			}
+		}
+	}
+
+	public static boolean cancelPotentialWork(Message message, ImageView imageView) {
+		final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
+
+		if (bitmapWorkerTask != null) {
+			final Message oldMessage = bitmapWorkerTask.message;
+			if (oldMessage == null || message != oldMessage) {
+				bitmapWorkerTask.cancel(true);
+			} else {
+				return false;
+			}
+		}
+		return true;
+	}
+
+	private static BitmapWorkerTask getBitmapWorkerTask(ImageView imageView) {
+		if (imageView != null) {
+			final Drawable drawable = imageView.getDrawable();
+			if (drawable instanceof AsyncDrawable) {
+				final AsyncDrawable asyncDrawable = (AsyncDrawable) drawable;
+				return asyncDrawable.getBitmapWorkerTask();
+			}
+		}
+		return null;
+	}
+
+	static class AsyncDrawable extends BitmapDrawable {
+		private final WeakReference<BitmapWorkerTask> bitmapWorkerTaskReference;
+
+		public AsyncDrawable(Resources res, Bitmap bitmap, BitmapWorkerTask bitmapWorkerTask) {
+			super(res, bitmap);
+			bitmapWorkerTaskReference = new WeakReference<>(bitmapWorkerTask);
+		}
+
+		public BitmapWorkerTask getBitmapWorkerTask() {
+			return bitmapWorkerTaskReference.get();
+		}
 	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/adapter/PresencesArrayAdapter.java b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/PresencesArrayAdapter.java
index 0b5cb897..2f8d12f2 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/adapter/PresencesArrayAdapter.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/PresencesArrayAdapter.java
@@ -6,7 +6,6 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ArrayAdapter;
-import android.widget.ImageView;
 import android.widget.TextView;
 
 import java.util.ArrayList;
@@ -45,10 +44,10 @@ public class PresencesArrayAdapter extends ArrayAdapter<Presence> {
     private static Presence[] getPresenceArray(Presences presences) {
         ArrayList<Presence> presenceArrayList = new ArrayList<>();
         if (null != presences && null != presences.getPresences() && !presences.getPresences().isEmpty()) {
-            for (Map.Entry<String, Integer> entry : presences.getPresences().entrySet()) {
+            for (Map.Entry<String, de.thedevstack.conversationsplus.entities.Presence> entry : presences.getPresences().entrySet()) {
                 Presence p = new Presence();
                 p.resource = entry.getKey();
-                p.status = entry.getValue();
+                p.status = entry.getValue().getStatus();
                 presenceArrayList.add(p);
             }
             presenceArrayList.trimToSize();
@@ -59,5 +58,5 @@ public class PresencesArrayAdapter extends ArrayAdapter<Presence> {
 
 class Presence {
     String resource;
-    int status;
+    de.thedevstack.conversationsplus.entities.Presence.Status status;
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/dialogs/UserDecisionDialog.java b/src/main/java/de/thedevstack/conversationsplus/ui/dialogs/UserDecisionDialog.java
index ad920934..72d9d904 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/dialogs/UserDecisionDialog.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/dialogs/UserDecisionDialog.java
@@ -6,9 +6,9 @@ import android.view.View;
 import android.widget.CheckBox;
 import android.widget.TextView;
 
-import de.thedevstack.conversationsplus.R;
 import de.thedevstack.conversationsplus.enums.UserDecision;
 import de.thedevstack.conversationsplus.ui.listeners.UserDecisionListener;
+import de.thedevstack.conversationsplus.R;
 
 /**
  * Created by tzur on 31.10.2015.
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/forms/FormBooleanFieldWrapper.java b/src/main/java/de/thedevstack/conversationsplus/ui/forms/FormBooleanFieldWrapper.java
new file mode 100644
index 00000000..04c3fe20
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/forms/FormBooleanFieldWrapper.java
@@ -0,0 +1,80 @@
+package de.thedevstack.conversationsplus.ui.forms;
+
+import android.content.Context;
+import android.widget.CheckBox;
+import android.widget.CompoundButton;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.xmpp.forms.Field;
+
+public class FormBooleanFieldWrapper extends FormFieldWrapper {
+
+	protected CheckBox checkBox;
+
+	protected FormBooleanFieldWrapper(Context context, Field field) {
+		super(context, field);
+		checkBox = (CheckBox) view.findViewById(R.id.field);
+		checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+			@Override
+			public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+				checkBox.setError(null);
+				invokeOnFormFieldValuesEdited();
+			}
+		});
+	}
+
+	@Override
+	protected void setLabel(String label, boolean required) {
+		CheckBox checkBox = (CheckBox) view.findViewById(R.id.field);
+		checkBox.setText(createSpannableLabelString(label, required));
+	}
+
+	@Override
+	public List<String> getValues() {
+		List<String> values = new ArrayList<>();
+		values.add(Boolean.toString(checkBox.isChecked()));
+		return values;
+	}
+
+	@Override
+	protected void setValues(List<String> values) {
+		if (values.size() == 0) {
+			checkBox.setChecked(false);
+		} else {
+			checkBox.setChecked(Boolean.parseBoolean(values.get(0)));
+		}
+	}
+
+	@Override
+	public boolean validates() {
+		if (checkBox.isChecked() || !field.isRequired()) {
+			return true;
+		} else {
+			checkBox.setError(context.getString(R.string.this_field_is_required));
+			checkBox.requestFocus();
+			return false;
+		}
+	}
+
+	@Override
+	public boolean edited() {
+		if (field.getValues().size() == 0) {
+			return checkBox.isChecked();
+		} else {
+			return super.edited();
+		}
+	}
+
+	@Override
+	protected int getLayoutResource() {
+		return R.layout.form_boolean;
+	}
+
+	@Override
+	void setReadOnly(boolean readOnly) {
+		checkBox.setEnabled(!readOnly);
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/forms/FormFieldFactory.java b/src/main/java/de/thedevstack/conversationsplus/ui/forms/FormFieldFactory.java
new file mode 100644
index 00000000..e726b6cc
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/forms/FormFieldFactory.java
@@ -0,0 +1,30 @@
+package de.thedevstack.conversationsplus.ui.forms;
+
+import android.content.Context;
+
+import java.util.Hashtable;
+
+import de.thedevstack.conversationsplus.xmpp.forms.Field;
+
+
+
+public class FormFieldFactory {
+
+	private static final Hashtable<String, Class> typeTable = new Hashtable<>();
+
+	static {
+		typeTable.put("text-single", FormTextFieldWrapper.class);
+		typeTable.put("text-multi", FormTextFieldWrapper.class);
+		typeTable.put("text-private", FormTextFieldWrapper.class);
+		typeTable.put("jid-single", FormJidSingleFieldWrapper.class);
+		typeTable.put("boolean", FormBooleanFieldWrapper.class);
+	}
+
+	protected static FormFieldWrapper createFromField(Context context, Field field) {
+		Class clazz = typeTable.get(field.getType());
+		if (clazz == null) {
+			clazz = FormTextFieldWrapper.class;
+		}
+		return FormFieldWrapper.createFromField(clazz, context, field);
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/forms/FormFieldWrapper.java b/src/main/java/de/thedevstack/conversationsplus/ui/forms/FormFieldWrapper.java
new file mode 100644
index 00000000..c82421a2
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/forms/FormFieldWrapper.java
@@ -0,0 +1,93 @@
+package de.thedevstack.conversationsplus.ui.forms;
+
+import android.content.Context;
+import android.text.SpannableString;
+import android.text.style.ForegroundColorSpan;
+import android.text.style.StyleSpan;
+import android.view.LayoutInflater;
+import android.view.View;
+
+import java.util.List;
+
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.xmpp.forms.Field;
+
+public abstract class FormFieldWrapper {
+
+	protected final Context context;
+	protected final Field field;
+	protected final View view;
+	protected OnFormFieldValuesEdited onFormFieldValuesEditedListener;
+
+	protected FormFieldWrapper(Context context, Field field) {
+		this.context = context;
+		this.field = field;
+		LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+		this.view = inflater.inflate(getLayoutResource(), null);
+		String label = field.getLabel();
+		if (label == null) {
+			label = field.getFieldName();
+		}
+		setLabel(label, field.isRequired());
+	}
+
+	public final void submit() {
+		this.field.setValues(getValues());
+	}
+
+	public final View getView() {
+		return view;
+	}
+
+	protected abstract void setLabel(String label, boolean required);
+
+	abstract List<String> getValues();
+
+	protected abstract void setValues(List<String> values);
+
+	abstract boolean validates();
+
+	abstract protected int getLayoutResource();
+
+	abstract void setReadOnly(boolean readOnly);
+
+	protected SpannableString createSpannableLabelString(String label, boolean required) {
+		SpannableString spannableString = new SpannableString(label + (required ? " *" : ""));
+		if (required) {
+			int start = label.length();
+			int end = label.length() + 2;
+			spannableString.setSpan(new StyleSpan(android.graphics.Typeface.BOLD), start, end, 0);
+			spannableString.setSpan(new ForegroundColorSpan(context.getResources().getColor(R.color.accent)), start, end, 0);
+		}
+		return spannableString;
+	}
+
+	protected void invokeOnFormFieldValuesEdited() {
+		if (this.onFormFieldValuesEditedListener != null) {
+			this.onFormFieldValuesEditedListener.onFormFieldValuesEdited();
+		}
+	}
+
+	public boolean edited() {
+		return !field.getValues().equals(getValues());
+	}
+
+	public void setOnFormFieldValuesEditedListener(OnFormFieldValuesEdited listener) {
+		this.onFormFieldValuesEditedListener = listener;
+	}
+
+	protected static <F extends FormFieldWrapper> FormFieldWrapper createFromField(Class<F> c, Context context, Field field) {
+		try {
+			F fieldWrapper = c.getDeclaredConstructor(Context.class, Field.class).newInstance(context,field);
+			fieldWrapper.setValues(field.getValues());
+			return fieldWrapper;
+		} catch (Exception e) {
+			e.printStackTrace();
+			return null;
+		}
+	}
+
+	public interface OnFormFieldValuesEdited {
+		void onFormFieldValuesEdited();
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/forms/FormJidSingleFieldWrapper.java b/src/main/java/de/thedevstack/conversationsplus/ui/forms/FormJidSingleFieldWrapper.java
new file mode 100644
index 00000000..c86653bf
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/forms/FormJidSingleFieldWrapper.java
@@ -0,0 +1,44 @@
+package de.thedevstack.conversationsplus.ui.forms;
+
+import android.content.Context;
+import android.text.InputType;
+
+import java.util.List;
+
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.xmpp.forms.Field;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class FormJidSingleFieldWrapper extends FormTextFieldWrapper {
+
+	protected FormJidSingleFieldWrapper(Context context, Field field) {
+		super(context, field);
+		editText.setInputType(InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS);
+		editText.setHint(R.string.account_settings_example_jabber_id);
+	}
+
+	@Override
+	public boolean validates() {
+		String value = getValue();
+		if (!value.isEmpty()) {
+			try {
+				Jid.fromString(value);
+			} catch (InvalidJidException e) {
+				editText.setError(context.getString(R.string.invalid_jid));
+				editText.requestFocus();
+				return false;
+			}
+		}
+		return super.validates();
+	}
+
+	@Override
+	protected void setValues(List<String> values) {
+		StringBuilder builder = new StringBuilder("");
+		for(String value : values) {
+			builder.append(value);
+		}
+		editText.setText(builder.toString());
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/forms/FormTextFieldWrapper.java b/src/main/java/de/thedevstack/conversationsplus/ui/forms/FormTextFieldWrapper.java
new file mode 100644
index 00000000..f825809c
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/forms/FormTextFieldWrapper.java
@@ -0,0 +1,97 @@
+package de.thedevstack.conversationsplus.ui.forms;
+
+import android.content.Context;
+import android.text.Editable;
+import android.text.InputType;
+import android.text.TextWatcher;
+import android.widget.EditText;
+import android.widget.TextView;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.xmpp.forms.Field;
+
+public class FormTextFieldWrapper extends FormFieldWrapper {
+
+	protected EditText editText;
+
+	protected FormTextFieldWrapper(Context context, Field field) {
+		super(context, field);
+		editText = (EditText) view.findViewById(R.id.field);
+		editText.setSingleLine(!"text-multi".equals(field.getType()));
+		if ("text-private".equals(field.getType())) {
+			editText.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
+		}
+		editText.addTextChangedListener(new TextWatcher() {
+			@Override
+			public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+			}
+
+			@Override
+			public void onTextChanged(CharSequence s, int start, int before, int count) {
+				editText.setError(null);
+				invokeOnFormFieldValuesEdited();
+			}
+
+			@Override
+			public void afterTextChanged(Editable s) {
+			}
+		});
+	}
+
+	@Override
+	protected void setLabel(String label, boolean required) {
+		TextView textView = (TextView) view.findViewById(R.id.label);
+		textView.setText(createSpannableLabelString(label, required));
+	}
+
+	protected String getValue() {
+		return editText.getText().toString();
+	}
+
+	@Override
+	public List<String> getValues() {
+		List<String> values = new ArrayList<>();
+		for (String line : getValue().split("\\n")) {
+			if (line.length() > 0) {
+				values.add(line);
+			}
+		}
+		return values;
+	}
+
+	@Override
+	protected void setValues(List<String> values) {
+		StringBuilder builder = new StringBuilder("");
+		for(int i = 0; i < values.size(); ++i) {
+			builder.append(values.get(i));
+			if (i < values.size() - 1 && "text-multi".equals(field.getType())) {
+				builder.append("\n");
+			}
+		}
+		editText.setText(builder.toString());
+	}
+
+	@Override
+	public boolean validates() {
+		if (getValue().trim().length() > 0 || !field.isRequired()) {
+			return true;
+		} else {
+			editText.setError(context.getString(R.string.this_field_is_required));
+			editText.requestFocus();
+			return false;
+		}
+	}
+
+	@Override
+	protected int getLayoutResource() {
+		return R.layout.form_text;
+	}
+
+	@Override
+	void setReadOnly(boolean readOnly) {
+		editText.setEnabled(!readOnly);
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/forms/FormWrapper.java b/src/main/java/de/thedevstack/conversationsplus/ui/forms/FormWrapper.java
new file mode 100644
index 00000000..8ff9efae
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/forms/FormWrapper.java
@@ -0,0 +1,72 @@
+package de.thedevstack.conversationsplus.ui.forms;
+
+import android.content.Context;
+import android.widget.LinearLayout;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import de.thedevstack.conversationsplus.xmpp.forms.Data;
+import de.thedevstack.conversationsplus.xmpp.forms.Field;
+
+public class FormWrapper {
+
+	private final LinearLayout layout;
+
+	private final Data form;
+
+	private final List<FormFieldWrapper> fieldWrappers = new ArrayList<>();
+
+	private FormWrapper(Context context, LinearLayout linearLayout, Data form) {
+		this.form = form;
+		this.layout = linearLayout;
+		this.layout.removeAllViews();
+		for(Field field : form.getFields()) {
+			FormFieldWrapper fieldWrapper = FormFieldFactory.createFromField(context,field);
+			if (fieldWrapper != null) {
+				layout.addView(fieldWrapper.getView());
+				fieldWrappers.add(fieldWrapper);
+			}
+		}
+	}
+
+	public Data submit() {
+		for(FormFieldWrapper fieldWrapper : fieldWrappers) {
+			fieldWrapper.submit();
+		}
+		this.form.submit();
+		return this.form;
+	}
+
+	public boolean validates() {
+		boolean validates = true;
+		for(FormFieldWrapper fieldWrapper : fieldWrappers) {
+			validates &= fieldWrapper.validates();
+		}
+		return validates;
+	}
+
+	public void setOnFormFieldValuesEditedListener(FormFieldWrapper.OnFormFieldValuesEdited listener) {
+		for(FormFieldWrapper fieldWrapper : fieldWrappers) {
+			fieldWrapper.setOnFormFieldValuesEditedListener(listener);
+		}
+	}
+
+	public void setReadOnly(boolean b) {
+		for(FormFieldWrapper fieldWrapper : fieldWrappers) {
+			fieldWrapper.setReadOnly(b);
+		}
+	}
+
+	public boolean edited() {
+		boolean edited = false;
+		for(FormFieldWrapper fieldWrapper : fieldWrappers) {
+			edited |= fieldWrapper.edited();
+		}
+		return edited;
+	}
+
+	public static FormWrapper createInLayout(Context context, LinearLayout layout, Data form) {
+		return new FormWrapper(context, layout, form);
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/listeners/ConversationSwipeRefreshListener.java b/src/main/java/de/thedevstack/conversationsplus/ui/listeners/ConversationSwipeRefreshListener.java
index 30b7bf73..5076da28 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/listeners/ConversationSwipeRefreshListener.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/listeners/ConversationSwipeRefreshListener.java
@@ -8,11 +8,11 @@ import com.orangegangsters.github.swipyrefreshlayout.library.SwipyRefreshLayoutD
 import java.util.List;
 
 import de.thedevstack.android.logcat.Logging;
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.R;
 import de.thedevstack.conversationsplus.entities.Conversation;
-import de.thedevstack.conversationsplus.services.MessageArchiveService;
-import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.services.MessageArchiveService;
 import de.thedevstack.conversationsplus.ui.ConversationActivity;
 import de.thedevstack.conversationsplus.ui.ConversationFragment;
 import de.thedevstack.conversationsplus.ui.adapter.MessageAdapter;
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/listeners/ResizePictureUserDecisionListener.java b/src/main/java/de/thedevstack/conversationsplus/ui/listeners/ResizePictureUserDecisionListener.java
index a9c245ed..1b4c7802 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/listeners/ResizePictureUserDecisionListener.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/listeners/ResizePictureUserDecisionListener.java
@@ -13,19 +13,19 @@ import java.io.InputStream;
 import de.thedevstack.android.logcat.Logging;
 import de.thedevstack.conversationsplus.ConversationsPlusApplication;
 import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
+import de.thedevstack.conversationsplus.enums.UserDecision;
+import de.thedevstack.conversationsplus.exceptions.UiException;
+import de.thedevstack.conversationsplus.utils.FileHelper;
+import de.thedevstack.conversationsplus.utils.ImageUtil;
+import de.thedevstack.conversationsplus.utils.MessageUtil;
 import de.thedevstack.conversationsplus.R;
 import de.thedevstack.conversationsplus.entities.Conversation;
 import de.thedevstack.conversationsplus.entities.DownloadableFile;
 import de.thedevstack.conversationsplus.entities.Message;
-import de.thedevstack.conversationsplus.enums.UserDecision;
-import de.thedevstack.conversationsplus.exceptions.UiException;
 import de.thedevstack.conversationsplus.persistance.FileBackend;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
 import de.thedevstack.conversationsplus.ui.UiCallback;
 import de.thedevstack.conversationsplus.ui.XmppActivity;
-import de.thedevstack.conversationsplus.utils.FileHelper;
-import de.thedevstack.conversationsplus.utils.ImageUtil;
-import de.thedevstack.conversationsplus.utils.MessageUtil;
 
 /**
  * Created by tzur on 31.10.2015.
@@ -59,6 +59,7 @@ public class ResizePictureUserDecisionListener implements UserDecisionListener {
             @Override
             public void error(int error, Message message) {
                 hidePrepareFileToast();
+                //TODO Find another way to display an error dialog
                 ResizePictureUserDecisionListener.this.activity.displayErrorDialog(error);
             }
 
@@ -96,10 +97,10 @@ public class ResizePictureUserDecisionListener implements UserDecisionListener {
         this.showPrepareFileToast();
         final Message message;
         final boolean forceEncryption = ConversationsPlusPreferences.forceEncryption();
-        if (conversation.getNextEncryption(forceEncryption) == Message.ENCRYPTION_PGP) {
+        if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP) {
             message = new Message(conversation, "", Message.ENCRYPTION_DECRYPTED);
         } else {
-            message = new Message(conversation, "", conversation.getNextEncryption(forceEncryption));
+            message = new Message(conversation, "", conversation.getNextEncryption());
         }
         message.setCounterpart(conversation.getNextCounterpart());
         message.setType(Message.TYPE_IMAGE);
@@ -115,7 +116,7 @@ public class ResizePictureUserDecisionListener implements UserDecisionListener {
                     int imageWidth = resizedAndRotatedImage.getWidth();
                     int imageHeight = resizedAndRotatedImage.getHeight();
                     MessageUtil.updateMessageWithImageDetails(message, filePath, imageSize, imageWidth, imageHeight);
-                    if (conversation.getNextEncryption(forceEncryption) == Message.ENCRYPTION_PGP) {
+                    if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP) {
                         xmppConnectionService.getPgpEngine().encrypt(message, callback);
                     } else {
                         callback.success(message);
@@ -133,10 +134,10 @@ public class ResizePictureUserDecisionListener implements UserDecisionListener {
         this.showPrepareFileToast();
         final Message message;
         final boolean forceEncryption = ConversationsPlusPreferences.forceEncryption();
-        if (conversation.getNextEncryption(forceEncryption) == Message.ENCRYPTION_PGP) {
+        if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP) {
             message = new Message(conversation, "", Message.ENCRYPTION_DECRYPTED);
         } else {
-            message = new Message(conversation, "", conversation.getNextEncryption(forceEncryption));
+            message = new Message(conversation, "", conversation.getNextEncryption());
         }
         message.setCounterpart(conversation.getNextCounterpart());
         message.setType(Message.TYPE_IMAGE);
@@ -154,7 +155,7 @@ public class ResizePictureUserDecisionListener implements UserDecisionListener {
                     int imageWidth = options.outWidth;
                     String filePath = FileHelper.getRealPathFromUri(uri);
                     MessageUtil.updateMessageWithImageDetails(message, filePath, imageSize, imageWidth, imageHeight);
-                    if (conversation.getNextEncryption(forceEncryption) == Message.ENCRYPTION_PGP) {
+                    if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP) {
                         xmppConnectionService.getPgpEngine().encrypt(message, callback);
                     } else {
                         callback.success(message);
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/listeners/ShowResourcesListDialogListener.java b/src/main/java/de/thedevstack/conversationsplus/ui/listeners/ShowResourcesListDialogListener.java
index 070ea58c..791b31a7 100644
--- a/src/main/java/de/thedevstack/conversationsplus/ui/listeners/ShowResourcesListDialogListener.java
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/listeners/ShowResourcesListDialogListener.java
@@ -3,10 +3,10 @@ package de.thedevstack.conversationsplus.ui.listeners;
 import android.content.Context;
 import android.view.View;
 
-import de.thedevstack.conversationsplus.R;
-import de.thedevstack.conversationsplus.entities.Contact;
 import de.thedevstack.conversationsplus.ui.adapter.PresencesArrayAdapter;
 import de.thedevstack.conversationsplus.ui.dialogs.AbstractAlertDialog;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Contact;
 
 /**
  * This listener shows the dialog with the resources of a contact.
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/widget/Switch.java b/src/main/java/de/thedevstack/conversationsplus/ui/widget/Switch.java
new file mode 100644
index 00000000..e5a4f0dc
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/widget/Switch.java
@@ -0,0 +1,68 @@
+package de.thedevstack.conversationsplus.ui.widget;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+import android.view.ViewConfiguration;
+
+import com.kyleduo.switchbutton.SwitchButton;
+
+public class Switch extends SwitchButton {
+
+	private int mTouchSlop;
+	private int mClickTimeout;
+	private float mStartX;
+	private float mStartY;
+	private OnClickListener mOnClickListener;
+
+	public Switch(Context context) {
+		super(context);
+		mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop();
+		mClickTimeout = ViewConfiguration.getPressedStateDuration() + ViewConfiguration.getTapTimeout();
+	}
+
+	public Switch(Context context, AttributeSet attrs) {
+		super(context, attrs);
+		mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop();
+		mClickTimeout = ViewConfiguration.getPressedStateDuration() + ViewConfiguration.getTapTimeout();
+	}
+
+	public Switch(Context context, AttributeSet attrs, int defStyle) {
+		super(context, attrs, defStyle);
+		mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop();
+		mClickTimeout = ViewConfiguration.getPressedStateDuration() + ViewConfiguration.getTapTimeout();
+	}
+
+	@Override
+	public void setOnClickListener(OnClickListener onClickListener) {
+		this.mOnClickListener = onClickListener;
+	}
+
+	@Override
+	public boolean onTouchEvent(MotionEvent event) {
+		if (!isEnabled()) {
+			float deltaX = event.getX() - mStartX;
+			float deltaY = event.getY() - mStartY;
+			int action = event.getAction();
+			switch (action) {
+				case MotionEvent.ACTION_DOWN:
+					mStartX = event.getX();
+					mStartY = event.getY();
+					break;
+				case MotionEvent.ACTION_CANCEL:
+				case MotionEvent.ACTION_UP:
+					float time = event.getEventTime() - event.getDownTime();
+					if (deltaX < mTouchSlop && deltaY < mTouchSlop && time < mClickTimeout) {
+						if (mOnClickListener != null) {
+							this.mOnClickListener.onClick(this);
+						}
+					}
+					break;
+				default:
+					break;
+			}
+			return true;
+		}
+		return super.onTouchEvent(event);
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/AvatarUtil.java b/src/main/java/de/thedevstack/conversationsplus/utils/AvatarUtil.java
index 660100a3..206ee668 100644
--- a/src/main/java/de/thedevstack/conversationsplus/utils/AvatarUtil.java
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/AvatarUtil.java
@@ -16,8 +16,8 @@ import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 
 import de.thedevstack.android.logcat.Logging;
-import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.ConversationsPlusApplication;
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.xmpp.pep.Avatar;
 
 /**
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/CryptoHelper.java b/src/main/java/de/thedevstack/conversationsplus/utils/CryptoHelper.java
index 9599aa37..7e4a4fc5 100644
--- a/src/main/java/de/thedevstack/conversationsplus/utils/CryptoHelper.java
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/CryptoHelper.java
@@ -1,20 +1,35 @@
 package de.thedevstack.conversationsplus.utils;
 
-import java.security.SecureRandom;
+import android.os.Bundle;
+import android.util.Pair;
+
+import org.bouncycastle.asn1.x500.X500Name;
+import org.bouncycastle.asn1.x500.style.BCStyle;
+import org.bouncycastle.asn1.x500.style.IETFUtils;
+import org.bouncycastle.cert.jcajce.JcaX509CertificateHolder;
+
+import java.security.MessageDigest;
+import java.security.cert.CertificateEncodingException;
+import java.security.cert.CertificateParsingException;
+import java.security.cert.X509Certificate;
 import java.text.Normalizer;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Iterator;
 import java.util.LinkedHashSet;
 import java.util.List;
+import java.util.Locale;
 
 import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 
 public final class CryptoHelper {
 	public static final String FILETRANSFER = "?FILETRANSFERv1:";
 	private final static char[] hexArray = "0123456789abcdef".toCharArray();
-	private final static char[] vowels = "aeiou".toCharArray();
-	private final static char[] consonants = "bcdfghjklmnpqrstvwxyz".toCharArray();
 	final public static byte[] ONE = new byte[] { 0, 0, 0, 1 };
 
 	public static String bytesToHex(byte[] bytes) {
@@ -48,22 +63,6 @@ public final class CryptoHelper {
 		return result;
 	}
 
-	public static String randomMucName(SecureRandom random) {
-		return randomWord(3, random) + "." + randomWord(7, random);
-	}
-
-	private static String randomWord(int lenght, SecureRandom random) {
-		StringBuilder builder = new StringBuilder(lenght);
-		for (int i = 0; i < lenght; ++i) {
-			if (i % 2 == 0) {
-				builder.append(consonants[random.nextInt(consonants.length)]);
-			} else {
-				builder.append(vowels[random.nextInt(vowels.length)]);
-			}
-		}
-		return builder.toString();
-	}
-
 	/**
 	 * Escapes usernames or passwords for SASL.
 	 */
@@ -96,11 +95,18 @@ public final class CryptoHelper {
 		} else if (fingerprint.length() < 40) {
 			return fingerprint;
 		}
+		StringBuilder builder = new StringBuilder(fingerprint.toLowerCase(Locale.US).replaceAll("\\s", ""));
+		for(int i=8;i<builder.length();i+=9) {
+			builder.insert(i, ' ');
+		}
+		return builder.toString();
+	}
+
+	public static String prettifyFingerprintCert(String fingerprint) {
 		StringBuilder builder = new StringBuilder(fingerprint);
-		builder.insert(8, " ");
-		builder.insert(17, " ");
-		builder.insert(26, " ");
-		builder.insert(35, " ");
+		for(int i=2;i < builder.length(); i+=3) {
+			builder.insert(i,':');
+		}
 		return builder.toString();
 	}
 
@@ -126,4 +132,80 @@ public final class CryptoHelper {
 			}
 		}
 	}
+
+	public static Pair<Jid,String> extractJidAndName(X509Certificate certificate) throws CertificateEncodingException, InvalidJidException, CertificateParsingException {
+		Collection<List<?>> alternativeNames = certificate.getSubjectAlternativeNames();
+		List<String> emails = new ArrayList<>();
+		if (alternativeNames != null) {
+			for(List<?> san : alternativeNames) {
+				Integer type = (Integer) san.get(0);
+				if (type == 1) {
+					emails.add((String) san.get(1));
+				}
+			}
+		}
+		X500Name x500name = new JcaX509CertificateHolder(certificate).getSubject();
+		if (emails.size() == 0) {
+			emails.add(IETFUtils.valueToString(x500name.getRDNs(BCStyle.EmailAddress)[0].getFirst().getValue()));
+		}
+		String name = IETFUtils.valueToString(x500name.getRDNs(BCStyle.CN)[0].getFirst().getValue());
+		if (emails.size() >= 1) {
+			return new Pair<>(Jid.fromString(emails.get(0)), name);
+		} else {
+			return null;
+		}
+	}
+
+	public static Bundle extractCertificateInformation(X509Certificate certificate) {
+		Bundle information = new Bundle();
+		try {
+			JcaX509CertificateHolder holder = new JcaX509CertificateHolder(certificate);
+			X500Name subject = holder.getSubject();
+			try {
+				information.putString("subject_cn", subject.getRDNs(BCStyle.CN)[0].getFirst().getValue().toString());
+			} catch (Exception e) {
+				//ignored
+			}
+			try {
+				information.putString("subject_o",subject.getRDNs(BCStyle.O)[0].getFirst().getValue().toString());
+			} catch (Exception e) {
+				//ignored
+			}
+
+			X500Name issuer = holder.getIssuer();
+			try {
+				information.putString("issuer_cn", issuer.getRDNs(BCStyle.CN)[0].getFirst().getValue().toString());
+			} catch (Exception e) {
+				//ignored
+			}
+			try {
+				information.putString("issuer_o", issuer.getRDNs(BCStyle.O)[0].getFirst().getValue().toString());
+			} catch (Exception e) {
+				//ignored
+			}
+			try {
+				MessageDigest md = MessageDigest.getInstance("SHA-1");
+				byte[] fingerprint = md.digest(certificate.getEncoded());
+				information.putString("sha1", prettifyFingerprintCert(bytesToHex(fingerprint)));
+			} catch (Exception e) {
+
+			}
+			return information;
+		} catch (CertificateEncodingException e) {
+			return information;
+		}
+	}
+
+	public static int encryptionTypeToText(int encryption) {
+		switch (encryption) {
+			case Message.ENCRYPTION_OTR:
+				return R.string.encryption_choice_otr;
+			case Message.ENCRYPTION_AXOLOTL:
+				return R.string.encryption_choice_omemo;
+			case Message.ENCRYPTION_NONE:
+				return R.string.encryption_choice_unencrypted;
+			default:
+				return R.string.encryption_choice_pgp;
+		}
+	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/DNSHelper.java b/src/main/java/de/thedevstack/conversationsplus/utils/DNSHelper.java
index 9481572d..90618292 100644
--- a/src/main/java/de/thedevstack/conversationsplus/utils/DNSHelper.java
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/DNSHelper.java
@@ -1,33 +1,50 @@
 package de.thedevstack.conversationsplus.utils;
 
-import de.measite.minidns.Client;
-import de.measite.minidns.DNSMessage;
-import de.measite.minidns.Record;
-import de.measite.minidns.Record.TYPE;
-import de.measite.minidns.Record.CLASS;
-import de.measite.minidns.record.SRV;
-import de.measite.minidns.record.Data;
-import de.measite.minidns.util.NameUtil;
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.LinkProperties;
+import android.net.Network;
+import android.net.RouteInfo;
+import android.os.Build;
 
 import java.io.IOException;
 import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.TreeSet;
 import java.util.regex.Pattern;
 
+import de.measite.minidns.Client;
+import de.measite.minidns.DNSMessage;
+import de.measite.minidns.Record;
+import de.measite.minidns.Record.CLASS;
+import de.measite.minidns.Record.TYPE;
+import de.measite.minidns.record.Data;
+import de.measite.minidns.record.SRV;
+import de.measite.minidns.util.NameUtil;
 import de.thedevstack.android.logcat.Logging;
+import de.thedevstack.conversationsplus.ConversationsPlusApplication;
 import de.thedevstack.conversationsplus.dto.SrvRecord;
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 
 public class DNSHelper {
     private static final String CLIENT_SRV_PREFIX = "_xmpp-client._tcp.";
-    private static final Pattern PATTERN_IPV4 = Pattern.compile("\\A(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\z");
-    private static final Pattern PATTERN_IPV6_HEX4DECCOMPRESSED = Pattern.compile("\\A((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?) ::((?:[0-9A-Fa-f]{1,4}:)*)(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\z");
-    private static final Pattern PATTERN_IPV6_6HEX4DEC = Pattern.compile("\\A((?:[0-9A-Fa-f]{1,4}:){6,6})(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\z");
-    private static final Pattern PATTERN_IPV6_HEXCOMPRESSED = Pattern.compile("\\A((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)::((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)\\z");
-    private static final Pattern PATTERN_IPV6 = Pattern.compile("\\A(?:[0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}\\z");
+    private static final String SECURE_CLIENT_SRV_PREFIX = "_xmpps-client._tcp.";
+	private static final Pattern PATTERN_IPV4 = Pattern.compile("\\A(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\z");
+	private static final Pattern PATTERN_IPV6_HEX4DECCOMPRESSED = Pattern.compile("\\A((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?) ::((?:[0-9A-Fa-f]{1,4}:)*)(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\z");
+	private static final Pattern PATTERN_IPV6_6HEX4DEC = Pattern.compile("\\A((?:[0-9A-Fa-f]{1,4}:){6,6})(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\z");
+	private static final Pattern PATTERN_IPV6_HEXCOMPRESSED = Pattern.compile("\\A((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)::((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)\\z");
+	private static final Pattern PATTERN_IPV6 = Pattern.compile("\\A(?:[0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}\\z");
 
 	protected static Client client = new Client();
 
+    static {
+        client.setTimeout(Config.PING_TIMEOUT * 1000);
+    }
+
     /**
      * Queries the SRV record for the server JID.
      * This method uses all available Domain Name Servers.
@@ -36,12 +53,13 @@ public class DNSHelper {
      */
     public static final TreeSet<SrvRecord> querySrvRecord(Jid jid) {
         String host = jid.getDomainpart();
-        String dns[] = client.findDNS();
         TreeSet<SrvRecord> result = new TreeSet<>();
 
-        if (dns != null) {
-            for (String dnsserver : dns) {
-                result = querySrvRecord(host, dnsserver);
+        final List<InetAddress> dnsServers = Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP ? getDnsServers() : getDnsServersPreLollipop();
+
+        if (dnsServers != null) {
+            for (InetAddress dnsServer : dnsServers) {
+                result = querySrvRecord(host, dnsServer);
                 if (!result.isEmpty()) {
                     break;
                 }
@@ -51,51 +69,92 @@ public class DNSHelper {
         return result;
     }
 
+	@TargetApi(21)
+	private static List<InetAddress> getDnsServers() {
+		List<InetAddress> servers = new ArrayList<>();
+		ConnectivityManager connectivityManager = (ConnectivityManager) ConversationsPlusApplication.getInstance().getSystemService(Context.CONNECTIVITY_SERVICE);
+		Network[] networks = connectivityManager == null ? null : connectivityManager.getAllNetworks();
+		if (networks == null) {
+			return getDnsServersPreLollipop();
+		}
+		for(int i = 0; i < networks.length; ++i) {
+			LinkProperties linkProperties = connectivityManager.getLinkProperties(networks[i]);
+			if (linkProperties != null) {
+				if (hasDefaultRoute(linkProperties)) {
+					servers.addAll(0, linkProperties.getDnsServers());
+				} else {
+					servers.addAll(linkProperties.getDnsServers());
+				}
+			}
+		}
+		if (servers.size() > 0) {
+            Logging.d("dns", "used lollipop variant to discover dns servers in " + networks.length + " networks");
+		}
+		return servers.size() > 0 ? servers : getDnsServersPreLollipop();
+	}
+
+	@TargetApi(Build.VERSION_CODES.LOLLIPOP)
+	private static boolean hasDefaultRoute(LinkProperties linkProperties) {
+		for(RouteInfo route: linkProperties.getRoutes()) {
+			if (route.isDefaultRoute()) {
+				return true;
+			}
+		}
+		return false;
+	}
+
+	private static List<InetAddress> getDnsServersPreLollipop() {
+		List<InetAddress> servers = new ArrayList<>();
+		String[] dns = client.findDNS();
+		for(int i = 0; i < dns.length; ++i) {
+			try {
+				servers.add(InetAddress.getByName(dns[i]));
+			} catch (UnknownHostException e) {
+				//ignore
+			}
+		}
+		return servers;
+	}
+
     /**
      * Queries the SRV record for an host from the given Domain Name Server.
      * @param host the host to query for
-     * @param dnsserver the DNS to query on
+     * @param dnsServerAddress the DNS to query on
      * @return TreeSet with SrvRecords.
      */
-    private static final TreeSet<SrvRecord> querySrvRecord(String host, String dnsserver) {
+    private static final TreeSet<SrvRecord> querySrvRecord(String host, InetAddress dnsServerAddress) {
         TreeSet<SrvRecord> result = new TreeSet<>();
+        querySrvRecord(host, dnsServerAddress, false, result);
+        querySrvRecord(host, dnsServerAddress, true, result);
+        return result;
+    }
+
+    private static final void querySrvRecord(String host, InetAddress dnsServerAddress, boolean tlsSrvRecord, TreeSet<SrvRecord> result) {
+        String qname = (tlsSrvRecord ? SECURE_CLIENT_SRV_PREFIX : CLIENT_SRV_PREFIX) + host;
+        String dnsServerHostAddress = dnsServerAddress.getHostAddress();
+        Logging.d("dns", "using dns server: " + dnsServerHostAddress + " to look up " + qname);
         try {
-            InetAddress dnsServerAddress = InetAddress.getByName(dnsserver);
-            String qname = CLIENT_SRV_PREFIX + host;
-            DNSMessage message = client.query(qname, TYPE.SRV, CLASS.IN, dnsServerAddress.getHostAddress());
+            DNSMessage message = client.query(qname, TYPE.SRV, CLASS.IN, dnsServerHostAddress);
             Record[] rrset = message.getAnswers();
             for (Record rr : rrset) {
                 Data d = rr.getPayload();
                 if (d instanceof SRV && NameUtil.idnEquals(qname, rr.getName())) {
                     SRV srv = (SRV) d;
-                    SrvRecord srvRecord = new SrvRecord(srv.getPriority(), srv.getName(), srv.getPort());
+                    SrvRecord srvRecord = new SrvRecord(srv.getPriority(), srv.getName(), srv.getPort(), tlsSrvRecord);
                     result.add(srvRecord);
                 }
             }
         } catch (IOException e) {
-            Logging.d("dns", "Error while retrieving SRV record for '" + host + "' from DNS '" + dnsserver + "': " + e.getMessage());
+            Logging.d("dns", "Error while retrieving SRV record '" + qname + "' for '" + host + "' from DNS '" + dnsServerHostAddress + "': " + e.getMessage());
         }
-        return result;
     }
 
-    /**
-     * Checks whether the given server is an IP address or not.
-     * The following patterns are treated as valid IP addresses:
-     * <ul>
-     *     <li>{@link #PATTERN_IPV4}</li>
-     *     <li>{@link #PATTERN_IPV6}</li>
-     *     <li>{@link #PATTERN_IPV6_6HEX4DEC}</li>
-     *     <li>{@link #PATTERN_IPV6_HEX4DECCOMPRESSED}</li>
-     *     <li>{@link #PATTERN_IPV6_HEXCOMPRESSED}</li>
-     * </ul>
-     * @param server the string to check
-     * @return <code>true</code> if one of the patterns is matched <code>false</code> otherwise
-     */
 	public static boolean isIp(final String server) {
-		return PATTERN_IPV4.matcher(server).matches()
+		return server != null && (
+				PATTERN_IPV4.matcher(server).matches()
 				|| PATTERN_IPV6.matcher(server).matches()
 				|| PATTERN_IPV6_6HEX4DEC.matcher(server).matches()
 				|| PATTERN_IPV6_HEX4DECCOMPRESSED.matcher(server).matches()
-				|| PATTERN_IPV6_HEXCOMPRESSED.matcher(server).matches();
+				|| PATTERN_IPV6_HEXCOMPRESSED.matcher(server).matches());
 	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/ExceptionHandler.java b/src/main/java/de/thedevstack/conversationsplus/utils/ExceptionHandler.java
index 256287f1..a810b089 100644
--- a/src/main/java/de/thedevstack/conversationsplus/utils/ExceptionHandler.java
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/ExceptionHandler.java
@@ -1,5 +1,7 @@
 package de.thedevstack.conversationsplus.utils;
 
+import android.content.Context;
+
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.OutputStream;
@@ -8,8 +10,6 @@ import java.io.StringWriter;
 import java.io.Writer;
 import java.lang.Thread.UncaughtExceptionHandler;
 
-import android.content.Context;
-
 public class ExceptionHandler implements UncaughtExceptionHandler {
 
 	private UncaughtExceptionHandler defaultHandler;
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/ExceptionHelper.java b/src/main/java/de/thedevstack/conversationsplus/utils/ExceptionHelper.java
index 32f45127..913f2ab5 100644
--- a/src/main/java/de/thedevstack/conversationsplus/utils/ExceptionHelper.java
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/ExceptionHelper.java
@@ -1,5 +1,14 @@
 package de.thedevstack.conversationsplus.utils;
 
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.PackageManager.NameNotFoundException;
+import android.text.format.DateUtils;
+
 import java.io.BufferedReader;
 import java.io.FileInputStream;
 import java.io.IOException;
@@ -7,27 +16,17 @@ import java.io.InputStreamReader;
 import java.util.List;
 
 import de.thedevstack.android.logcat.Logging;
-import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.R;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Conversation;
 import de.thedevstack.conversationsplus.entities.Message;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.ui.ConversationActivity;
 import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 
-import android.app.AlertDialog;
-import android.content.Context;
-import android.content.DialogInterface;
-import android.content.SharedPreferences;
-import android.content.DialogInterface.OnClickListener;
-import android.content.pm.PackageInfo;
-import android.content.pm.PackageManager;
-import android.content.pm.PackageManager.NameNotFoundException;
-import android.preference.PreferenceManager;
-import android.text.format.DateUtils;
-
 public class ExceptionHelper {
 	public static void init(Context context) {
 		if (!(Thread.getDefaultUncaughtExceptionHandler() instanceof ExceptionHandler)) {
@@ -36,12 +35,11 @@ public class ExceptionHelper {
 		}
 	}
 
-	public static void checkForCrash(final Context context,
-			final XmppConnectionService service) {
+	public static boolean checkForCrash(final ConversationActivity activity, final XmppConnectionService service) {
 		try {
 			boolean neverSend = ConversationsPlusPreferences.neverSend();
 			if (neverSend) {
-				return;
+				return false;
 			}
 			List<Account> accounts = service.getAccounts();
 			Account account = null;
@@ -52,24 +50,25 @@ public class ExceptionHelper {
 				}
 			}
 			if (account == null) {
-				return;
+				return false;
 			}
 			final Account finalAccount = account;
-			FileInputStream file = context.openFileInput("stacktrace.txt");
+			FileInputStream file = activity.openFileInput("stacktrace.txt");
 			InputStreamReader inputStreamReader = new InputStreamReader(file);
 			BufferedReader stacktrace = new BufferedReader(inputStreamReader);
 			final StringBuilder report = new StringBuilder();
-			PackageManager pm = context.getPackageManager();
+			PackageManager pm = activity.getPackageManager();
 			PackageInfo packageInfo = null;
 			try {
-				packageInfo = pm.getPackageInfo(context.getPackageName(), 0);
+				packageInfo = pm.getPackageInfo(activity.getPackageName(), 0);
 				report.append("Version: " + packageInfo.versionName + '\n');
 				report.append("Last Update: "
-						+ DateUtils.formatDateTime(context,
-								packageInfo.lastUpdateTime,
-								DateUtils.FORMAT_SHOW_TIME
-										| DateUtils.FORMAT_SHOW_DATE) + '\n');
+						+ DateUtils.formatDateTime(activity,
+						packageInfo.lastUpdateTime,
+						DateUtils.FORMAT_SHOW_TIME
+								| DateUtils.FORMAT_SHOW_DATE) + '\n');
 			} catch (NameNotFoundException e) {
+				return false;
 			}
 			String line;
 			while ((line = stacktrace.readLine()) != null) {
@@ -77,11 +76,11 @@ public class ExceptionHelper {
 				report.append('\n');
 			}
 			file.close();
-			context.deleteFile("stacktrace.txt");
-			AlertDialog.Builder builder = new AlertDialog.Builder(context);
-			builder.setTitle(context.getString(R.string.crash_report_title));
-			builder.setMessage(context.getText(R.string.crash_report_message));
-			builder.setPositiveButton(context.getText(R.string.send_now),
+			activity.deleteFile("stacktrace.txt");
+			AlertDialog.Builder builder = new AlertDialog.Builder(activity);
+			builder.setTitle(activity.getString(R.string.crash_report_title));
+			builder.setMessage(activity.getText(R.string.crash_report_message));
+			builder.setPositiveButton(activity.getText(R.string.send_now),
 					new OnClickListener() {
 
 						@Override
@@ -90,18 +89,18 @@ public class ExceptionHelper {
 							Logging.d(Config.LOGTAG, "using account="
 									+ finalAccount.getJid().toBareJid()
 									+ " to send in stack trace");
-                            Conversation conversation = null;
-                            try {
-                                conversation = service.findOrCreateConversation(finalAccount,
-                                        Jid.fromString(context.getString(R.string.cplus_bugreport_jabberid)), false);
-                            } catch (final InvalidJidException ignored) {
-                            }
-                            Message message = new Message(conversation, report
+							Conversation conversation = null;
+							try {
+								conversation = service.findOrCreateConversation(finalAccount,
+										Jid.fromString(activity.getString(R.string.cplus_bugreport_jabberid)), false);
+							} catch (final InvalidJidException ignored) {
+							}
+							Message message = new Message(conversation, report
 									.toString(), Message.ENCRYPTION_NONE);
 							service.sendMessage(message);
 						}
 					});
-			builder.setNegativeButton(context.getText(R.string.send_never),
+			builder.setNegativeButton(activity.getText(R.string.send_never),
 					new OnClickListener() {
 
 						@Override
@@ -110,8 +109,9 @@ public class ExceptionHelper {
 						}
 					});
 			builder.create().show();
+			return true;
 		} catch (final IOException ignored) {
-        }
-
+			return false;
+		}
 	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/ExifHelper.java b/src/main/java/de/thedevstack/conversationsplus/utils/ExifHelper.java
index 576698ce..031bdfa5 100644
--- a/src/main/java/de/thedevstack/conversationsplus/utils/ExifHelper.java
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/ExifHelper.java
@@ -16,11 +16,11 @@
 
 package de.thedevstack.conversationsplus.utils;
 
-import de.thedevstack.android.logcat.Logging;
-
 import java.io.IOException;
 import java.io.InputStream;
 
+import de.thedevstack.android.logcat.Logging;
+
 public class ExifHelper {
     private static final String TAG = "CameraExif";
 
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/FileUtils.java b/src/main/java/de/thedevstack/conversationsplus/utils/FileUtils.java
new file mode 100644
index 00000000..2cf5679b
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/FileUtils.java
@@ -0,0 +1,149 @@
+package de.thedevstack.conversationsplus.utils;
+
+import android.annotation.SuppressLint;
+import android.content.ContentUris;
+import android.content.Context;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Environment;
+import android.provider.DocumentsContract;
+import android.provider.MediaStore;
+
+public class FileUtils {
+
+	/**
+	 * Get a file path from a Uri. This will get the the path for Storage Access
+	 * Framework Documents, as well as the _data field for the MediaStore and
+	 * other file-based ContentProviders.
+	 *
+	 * @param context The context.
+	 * @param uri     The Uri to query.
+	 * @author paulburke
+	 */
+	@SuppressLint("NewApi")
+	public static String getPath(final Context context, final Uri uri) {
+		if (uri == null) {
+			return null;
+		}
+
+		final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
+
+		// DocumentProvider
+		if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
+			// ExternalStorageProvider
+			if (isExternalStorageDocument(uri)) {
+				final String docId = DocumentsContract.getDocumentId(uri);
+				final String[] split = docId.split(":");
+				final String type = split[0];
+
+				if ("primary".equalsIgnoreCase(type)) {
+					return Environment.getExternalStorageDirectory() + "/" + split[1];
+				}
+
+				// TODO handle non-primary volumes
+			}
+			// DownloadsProvider
+			else if (isDownloadsDocument(uri)) {
+
+				final String id = DocumentsContract.getDocumentId(uri);
+				final Uri contentUri = ContentUris.withAppendedId(
+						Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
+
+				return getDataColumn(context, contentUri, null, null);
+			}
+			// MediaProvider
+			else if (isMediaDocument(uri)) {
+				final String docId = DocumentsContract.getDocumentId(uri);
+				final String[] split = docId.split(":");
+				final String type = split[0];
+
+				Uri contentUri = null;
+				if ("image".equals(type)) {
+					contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
+				} else if ("video".equals(type)) {
+					contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
+				} else if ("audio".equals(type)) {
+					contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
+				}
+
+				final String selection = "_id=?";
+				final String[] selectionArgs = new String[]{
+						split[1]
+				};
+
+				return getDataColumn(context, contentUri, selection, selectionArgs);
+			}
+		}
+		// MediaStore (and general)
+		else if ("content".equalsIgnoreCase(uri.getScheme())) {
+			return getDataColumn(context, uri, null, null);
+		}
+		// File
+		else if ("file".equalsIgnoreCase(uri.getScheme())) {
+			return uri.getPath();
+		}
+
+		return null;
+	}
+
+	/**
+	 * Get the value of the data column for this Uri. This is useful for
+	 * MediaStore Uris, and other file-based ContentProviders.
+	 *
+	 * @param context       The context.
+	 * @param uri           The Uri to query.
+	 * @param selection     (Optional) Filter used in the query.
+	 * @param selectionArgs (Optional) Selection arguments used in the query.
+	 * @return The value of the _data column, which is typically a file path.
+	 */
+	public static String getDataColumn(Context context, Uri uri, String selection,
+									   String[] selectionArgs) {
+
+		Cursor cursor = null;
+		final String column = "_data";
+		final String[] projection = {
+				column
+		};
+
+		try {
+			cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,null);
+			if (cursor != null && cursor.moveToFirst()) {
+				final int column_index = cursor.getColumnIndexOrThrow(column);
+				return cursor.getString(column_index);
+			}
+		} catch(Exception e) {
+			return null;
+		} finally {
+			if (cursor != null) {
+				cursor.close();
+			}
+		}
+		return null;
+	}
+
+
+	/**
+	 * @param uri The Uri to check.
+	 * @return Whether the Uri authority is ExternalStorageProvider.
+	 */
+	public static boolean isExternalStorageDocument(Uri uri) {
+		return "com.android.externalstorage.documents".equals(uri.getAuthority());
+	}
+
+	/**
+	 * @param uri The Uri to check.
+	 * @return Whether the Uri authority is DownloadsProvider.
+	 */
+	public static boolean isDownloadsDocument(Uri uri) {
+		return "com.android.providers.downloads.documents".equals(uri.getAuthority());
+	}
+
+	/**
+	 * @param uri The Uri to check.
+	 * @return Whether the Uri authority is MediaProvider.
+	 */
+	public static boolean isMediaDocument(Uri uri) {
+		return "com.android.providers.media.documents".equals(uri.getAuthority());
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/ImageUtil.java b/src/main/java/de/thedevstack/conversationsplus/utils/ImageUtil.java
index 9250c432..bf79d7e0 100644
--- a/src/main/java/de/thedevstack/conversationsplus/utils/ImageUtil.java
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/ImageUtil.java
@@ -11,16 +11,14 @@ import android.util.LruCache;
 
 import java.io.File;
 import java.io.FileNotFoundException;
-import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 
 import de.thedevstack.android.logcat.Logging;
+import de.thedevstack.conversationsplus.exceptions.ImageResizeException;
 import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.R;
 import de.thedevstack.conversationsplus.entities.Message;
-import de.thedevstack.conversationsplus.exceptions.FileCopyException;
-import de.thedevstack.conversationsplus.exceptions.ImageResizeException;
 import de.thedevstack.conversationsplus.persistance.FileBackend;
 
 /**
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/MessageUtil.java b/src/main/java/de/thedevstack/conversationsplus/utils/MessageUtil.java
index c04ebdb8..7afc3fa4 100644
--- a/src/main/java/de/thedevstack/conversationsplus/utils/MessageUtil.java
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/MessageUtil.java
@@ -3,6 +3,8 @@ package de.thedevstack.conversationsplus.utils;
 import android.graphics.BitmapFactory;
 
 import java.net.URL;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 import de.thedevstack.conversationsplus.entities.DownloadableFile;
 import de.thedevstack.conversationsplus.entities.Message;
@@ -12,6 +14,26 @@ import de.thedevstack.conversationsplus.persistance.FileBackend;
  * Created by tzur on 15.12.2015.
  */
 public final class MessageUtil {
+    public static boolean wasHighlightedOrPrivate(final Message message) {
+        final String nick = message.getConversation().getMucOptions().getActualNick();
+        final Pattern highlight = generateNickHighlightPattern(nick);
+        if (message.getBody() == null || nick == null) {
+            return false;
+        }
+        final Matcher m = highlight.matcher(message.getBody());
+        return (m.find() || message.getType() == Message.TYPE_PRIVATE);
+    }
+
+    private static Pattern generateNickHighlightPattern(final String nick) {
+        // We expect a word boundary, i.e. space or start of string, followed by
+        // the
+        // nick (matched in case-insensitive manner), followed by optional
+        // punctuation (for example "bob: i disagree" or "how are you alice?"),
+        // followed by another word boundary.
+        return Pattern.compile("\\b" + Pattern.quote(nick) + "\\p{Punct}?\\b",
+                Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE);
+    }
+
     public static void updateMessageWithImageDetails(Message message, String filePath, long size, int imageWidth, int imageHeight) {
         message.setRelativeFilePath(filePath);
         MessageUtil.updateMessageBodyWithImageParams(message, size, imageWidth, imageHeight);
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/MimeUtils.java b/src/main/java/de/thedevstack/conversationsplus/utils/MimeUtils.java
index c1c40f92..fdf55d2d 100644
--- a/src/main/java/de/thedevstack/conversationsplus/utils/MimeUtils.java
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/MimeUtils.java
@@ -458,7 +458,7 @@ public final class MimeUtils {
         if (extension == null || extension.isEmpty()) {
             return null;
         }
-        return extensionToMimeTypeMap.get(extension);
+        return extensionToMimeTypeMap.get(extension.toLowerCase());
     }
     /**
      * Returns true if the given extension has a registered MIME type.
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/OnPhoneContactsLoadedListener.java b/src/main/java/de/thedevstack/conversationsplus/utils/OnPhoneContactsLoadedListener.java
index e701d62b..eecee159 100644
--- a/src/main/java/de/thedevstack/conversationsplus/utils/OnPhoneContactsLoadedListener.java
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/OnPhoneContactsLoadedListener.java
@@ -1,9 +1,9 @@
 package de.thedevstack.conversationsplus.utils;
 
-import java.util.List;
-
 import android.os.Bundle;
 
+import java.util.List;
+
 public interface OnPhoneContactsLoadedListener {
 	public void onPhoneContactsLoaded(List<Bundle> phoneContacts);
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/PhoneHelper.java b/src/main/java/de/thedevstack/conversationsplus/utils/PhoneHelper.java
index d1f598c0..86a67661 100644
--- a/src/main/java/de/thedevstack/conversationsplus/utils/PhoneHelper.java
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/PhoneHelper.java
@@ -1,8 +1,6 @@
 package de.thedevstack.conversationsplus.utils;
 
-import java.util.List;
-import java.util.concurrent.RejectedExecutionException;
-
+import android.Manifest;
 import android.content.Context;
 import android.content.CursorLoader;
 import android.content.Loader;
@@ -10,20 +8,27 @@ import android.content.Loader.OnLoadCompleteListener;
 import android.content.pm.PackageManager;
 import android.database.Cursor;
 import android.net.Uri;
+import android.os.Build;
 import android.os.Bundle;
 import android.provider.ContactsContract;
 import android.provider.ContactsContract.Profile;
 
-import de.thedevstack.conversationsplus.ConversationsPlusApplication;
+import java.util.List;
+import java.util.concurrent.RejectedExecutionException;
 
 public class PhoneHelper {
 
-	public static void loadPhoneContacts(Context context,final List<Bundle> phoneContacts, final OnPhoneContactsLoadedListener listener) {
-		final String[] PROJECTION = new String[] { ContactsContract.Data._ID,
+	public static void loadPhoneContacts(Context context, final List<Bundle> phoneContacts, final OnPhoneContactsLoadedListener listener) {
+		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M
+				&& context.checkSelfPermission(Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED) {
+			listener.onPhoneContactsLoaded(phoneContacts);
+			return;
+		}
+		final String[] PROJECTION = new String[]{ContactsContract.Data._ID,
 				ContactsContract.Data.DISPLAY_NAME,
 				ContactsContract.Data.PHOTO_URI,
 				ContactsContract.Data.LOOKUP_KEY,
-				ContactsContract.CommonDataKinds.Im.DATA };
+				ContactsContract.CommonDataKinds.Im.DATA};
 
 		final String SELECTION = "(" + ContactsContract.Data.MIMETYPE + "=\""
 				+ ContactsContract.CommonDataKinds.Im.CONTENT_ITEM_TYPE
@@ -31,39 +36,39 @@ public class PhoneHelper {
 				+ "=\"" + ContactsContract.CommonDataKinds.Im.PROTOCOL_JABBER
 				+ "\")";
 
-		CursorLoader mCursorLoader = new CursorLoader(context,
+		CursorLoader mCursorLoader = new NotThrowCursorLoader(context,
 				ContactsContract.Data.CONTENT_URI, PROJECTION, SELECTION, null,
 				null);
 		mCursorLoader.registerListener(0, new OnLoadCompleteListener<Cursor>() {
 
 			@Override
 			public void onLoadComplete(Loader<Cursor> arg0, Cursor cursor) {
-				if (cursor == null) {
-					return;
-				}
-				while (cursor.moveToNext()) {
-					Bundle contact = new Bundle();
-					contact.putInt("phoneid", cursor.getInt(cursor
-							.getColumnIndex(ContactsContract.Data._ID)));
-					contact.putString(
-							"displayname",
-							cursor.getString(cursor
-									.getColumnIndex(ContactsContract.Data.DISPLAY_NAME)));
-					contact.putString("photouri", cursor.getString(cursor
-							.getColumnIndex(ContactsContract.Data.PHOTO_URI)));
-					contact.putString("lookup", cursor.getString(cursor
-							.getColumnIndex(ContactsContract.Data.LOOKUP_KEY)));
-
-					contact.putString(
-							"jid",
-							cursor.getString(cursor
-									.getColumnIndex(ContactsContract.CommonDataKinds.Im.DATA)));
-					phoneContacts.add(contact);
+				if (cursor != null) {
+					while (cursor.moveToNext()) {
+						Bundle contact = new Bundle();
+						contact.putInt("phoneid", cursor.getInt(cursor
+								.getColumnIndex(ContactsContract.Data._ID)));
+						contact.putString(
+								"displayname",
+								cursor.getString(cursor
+										.getColumnIndex(ContactsContract.Data.DISPLAY_NAME)));
+						contact.putString("photouri", cursor.getString(cursor
+								.getColumnIndex(ContactsContract.Data.PHOTO_URI)));
+						contact.putString("lookup", cursor.getString(cursor
+								.getColumnIndex(ContactsContract.Data.LOOKUP_KEY)));
+
+						contact.putString(
+								"jid",
+								cursor.getString(cursor
+										.getColumnIndex(ContactsContract.CommonDataKinds.Im.DATA)));
+						phoneContacts.add(contact);
+					}
+					cursor.close();
 				}
+
 				if (listener != null) {
 					listener.onPhoneContactsLoaded(phoneContacts);
 				}
-				cursor.close();
 			}
 		});
 		try {
@@ -75,8 +80,30 @@ public class PhoneHelper {
 		}
 	}
 
+	private static class NotThrowCursorLoader extends CursorLoader {
+
+		public NotThrowCursorLoader(Context c, Uri u, String[] p, String s, String[] sa, String so) {
+			super(c, u, p, s, sa, so);
+		}
+
+		@Override
+		public Cursor loadInBackground() {
+
+			try {
+				return (super.loadInBackground());
+			} catch (SecurityException e) {
+				return(null);
+			}
+		}
+
+	}
+
 	public static Uri getSefliUri(Context context) {
-		String[] mProjection = new String[] { Profile._ID, Profile.PHOTO_URI };
+		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M
+				&& context.checkSelfPermission(Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED) {
+			return null;
+		}
+		String[] mProjection = new String[]{Profile._ID, Profile.PHOTO_URI};
 		Cursor mProfileCursor = context.getContentResolver().query(
 				Profile.CONTENT_URI, mProjection, null, null, null);
 
@@ -93,4 +120,17 @@ public class PhoneHelper {
 			}
 		}
 	}
+
+	public static String getVersionName(Context context) {
+		final String packageName = context == null ? null : context.getPackageName();
+		if (packageName != null) {
+			try {
+				return context.getPackageManager().getPackageInfo(packageName, 0).versionName;
+			} catch (final PackageManager.NameNotFoundException | RuntimeException e) {
+				return "unknown";
+			}
+		} else {
+			return "unknown";
+		}
+	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/SSLSocketHelper.java b/src/main/java/de/thedevstack/conversationsplus/utils/SSLSocketHelper.java
new file mode 100644
index 00000000..1842e897
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/SSLSocketHelper.java
@@ -0,0 +1,73 @@
+package de.thedevstack.conversationsplus.utils;
+
+import android.os.Build;
+
+import java.lang.reflect.Method;
+import java.security.NoSuchAlgorithmException;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedList;
+
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.SSLSocket;
+import javax.net.ssl.SSLSocketFactory;
+
+public class SSLSocketHelper {
+
+	public static void setSecurity(final SSLSocket sslSocket) throws NoSuchAlgorithmException {
+		final String[] supportProtocols;
+		final Collection<String> supportedProtocols = new LinkedList<>(
+				Arrays.asList(sslSocket.getSupportedProtocols()));
+		supportedProtocols.remove("SSLv3");
+		supportProtocols = supportedProtocols.toArray(new String[supportedProtocols.size()]);
+
+		sslSocket.setEnabledProtocols(supportProtocols);
+
+		final String[] cipherSuites = CryptoHelper.getOrderedCipherSuites(
+				sslSocket.getSupportedCipherSuites());
+		if (cipherSuites.length > 0) {
+			sslSocket.setEnabledCipherSuites(cipherSuites);
+		}
+	}
+
+	public static void setSNIHost(final SSLSocketFactory factory, final SSLSocket socket, final String hostname) {
+		if (factory instanceof android.net.SSLCertificateSocketFactory && android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR1) {
+			((android.net.SSLCertificateSocketFactory) factory).setHostname(socket, hostname);
+		} else {
+			try {
+				socket.getClass().getMethod("setHostname", String.class).invoke(socket, hostname);
+			} catch (Throwable e) {
+				// ignore any error, we just can't set the hostname...
+			}
+		}
+	}
+
+	public static void setAlpnProtocol(final SSLSocketFactory factory, final SSLSocket socket, final String protocol) {
+		try {
+			if (factory instanceof android.net.SSLCertificateSocketFactory && android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {
+				// can't call directly because of @hide?
+				//((android.net.SSLCertificateSocketFactory)factory).setAlpnProtocols(new byte[][]{protocol.getBytes("UTF-8")});
+				android.net.SSLCertificateSocketFactory.class.getMethod("setAlpnProtocols", byte[][].class).invoke(socket, new Object[]{new byte[][]{protocol.getBytes("UTF-8")}});
+			} else {
+				final Method method = socket.getClass().getMethod("setAlpnProtocols", byte[].class);
+				// the concatenation of 8-bit, length prefixed protocol names, just one in our case...
+				// http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-04#page-4
+				final byte[] protocolUTF8Bytes = protocol.getBytes("UTF-8");
+				final byte[] lengthPrefixedProtocols = new byte[protocolUTF8Bytes.length + 1];
+				lengthPrefixedProtocols[0] = (byte) protocol.length(); // cannot be over 255 anyhow
+				System.arraycopy(protocolUTF8Bytes, 0, lengthPrefixedProtocols, 1, protocolUTF8Bytes.length);
+				method.invoke(socket, new Object[]{lengthPrefixedProtocols});
+			}
+		} catch (Throwable e) {
+			// ignore any error, we just can't set the alpn protocol...
+		}
+	}
+
+	public static SSLContext getSSLContext() throws NoSuchAlgorithmException {
+		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
+			return SSLContext.getInstance("TLSv1.2");
+		} else {
+			return SSLContext.getInstance("TLS");
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/SerialSingleThreadExecutor.java b/src/main/java/de/thedevstack/conversationsplus/utils/SerialSingleThreadExecutor.java
index 264645c6..4871af43 100644
--- a/src/main/java/de/thedevstack/conversationsplus/utils/SerialSingleThreadExecutor.java
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/SerialSingleThreadExecutor.java
@@ -31,4 +31,4 @@ public class SerialSingleThreadExecutor implements Executor {
 			executor.execute(active);
 		}
 	}
-}
+}
\ No newline at end of file
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/SocksSocketFactory.java b/src/main/java/de/thedevstack/conversationsplus/utils/SocksSocketFactory.java
new file mode 100644
index 00000000..940399c3
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/SocksSocketFactory.java
@@ -0,0 +1,52 @@
+package de.thedevstack.conversationsplus.utils;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.InetSocketAddress;
+import java.net.Socket;
+import java.nio.ByteBuffer;
+
+import de.thedevstack.conversationsplus.Config;
+
+public class SocksSocketFactory {
+
+	public static void createSocksConnection(Socket socket, String destination, int port) throws IOException {
+		InputStream proxyIs = socket.getInputStream();
+		OutputStream proxyOs = socket.getOutputStream();
+		proxyOs.write(new byte[]{0x05, 0x01, 0x00});
+		byte[] response = new byte[2];
+		proxyIs.read(response);
+		byte[] dest = destination.getBytes();
+		ByteBuffer request = ByteBuffer.allocate(7 + dest.length);
+		request.put(new byte[]{0x05, 0x01, 0x00, 0x03});
+		request.put((byte) dest.length);
+		request.put(dest);
+		request.putShort((short) port);
+		proxyOs.write(request.array());
+		response = new byte[7 + dest.length];
+		proxyIs.read(response);
+		if (response[1] != 0x00) {
+			throw new SocksConnectionException();
+		}
+	}
+
+	public static Socket createSocket(InetSocketAddress address, String destination, int port) throws IOException {
+		Socket socket = new Socket();
+		try {
+			socket.connect(address, Config.CONNECT_TIMEOUT * 1000);
+		} catch (IOException e) {
+			throw new SocksProxyNotFoundException();
+		}
+		createSocksConnection(socket, destination, port);
+		return socket;
+	}
+
+	static class SocksConnectionException extends IOException {
+
+	}
+
+	public static class SocksProxyNotFoundException extends IOException {
+
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/StreamUtil.java b/src/main/java/de/thedevstack/conversationsplus/utils/StreamUtil.java
index 64f46314..729bdf11 100644
--- a/src/main/java/de/thedevstack/conversationsplus/utils/StreamUtil.java
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/StreamUtil.java
@@ -6,6 +6,7 @@ import java.io.Closeable;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
+import java.net.Socket;
 
 import de.thedevstack.conversationsplus.ConversationsPlusApplication;
 
@@ -40,6 +41,20 @@ public final class StreamUtil {
     }
 
     /**
+     * Closes a socket.
+     * IOException is silently ignored.
+     * @param socket the socket to close
+     */
+    public static void close(Socket socket) {
+        if (socket != null) {
+            try {
+                socket.close();
+            } catch (IOException e) {
+            }
+        }
+    }
+
+    /**
      * Avoid instantiation of util class.
      */
     private StreamUtil() {
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/UIHelper.java b/src/main/java/de/thedevstack/conversationsplus/utils/UIHelper.java
index 532ff1cb..e1915e99 100644
--- a/src/main/java/de/thedevstack/conversationsplus/utils/UIHelper.java
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/UIHelper.java
@@ -1,44 +1,27 @@
 package de.thedevstack.conversationsplus.utils;
 
+import android.content.Context;
+import android.text.format.DateFormat;
+import android.text.format.DateUtils;
+import android.util.Pair;
+
 import java.math.BigDecimal;
-import java.text.NumberFormat;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.net.URLConnection;
 import java.util.Calendar;
 import java.util.Date;
-import java.util.HashMap;
 import java.util.Locale;
-import java.util.Map;
-import java.util.Map.Entry;
-import java.util.regex.Pattern;
-import java.util.regex.Matcher;
 
-import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.R;
 import de.thedevstack.conversationsplus.entities.Contact;
 import de.thedevstack.conversationsplus.entities.Conversation;
-import de.thedevstack.conversationsplus.entities.Presences;
-import de.thedevstack.conversationsplus.entities.Transferable;
 import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.entities.Presence;
+import de.thedevstack.conversationsplus.entities.Transferable;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 
-import android.content.Context;
-import android.text.format.DateFormat;
-import android.text.format.DateUtils;
-import android.text.Spannable.Factory;
-import android.text.style.ImageSpan;
-import android.text.Spannable;
-import android.util.Pair;
-
 public class UIHelper {
 
-	private static String BLACK_HEART_SUIT = "\u2665";
-	private static String HEAVY_BLACK_HEART_SUIT = "\u2764";
-	private static String WHITE_HEART_SUIT = "\u2661";
-
-	public static final ArrayList<String> HEARTS = new ArrayList<>(Arrays.asList(BLACK_HEART_SUIT,HEAVY_BLACK_HEART_SUIT,WHITE_HEART_SUIT));
-
 	private static final ArrayList<String> LOCATION_QUESTIONS = new ArrayList<>(Arrays.asList(
 			"where are you", //en
 			"where are you now", //en
@@ -144,7 +127,7 @@ public class UIHelper {
 	}
 
 	public static int getColorForName(String name) {
-		if (name.isEmpty()) {
+		if (name == null || name.isEmpty()) {
 			return 0xFF202020;
 		}
 		int colors[] = {0xFFe91e63, 0xFF9c27b0, 0xFF673ab7, 0xFF3f51b5,
@@ -184,7 +167,9 @@ public class UIHelper {
 					return new Pair<>("",false);
 			}
 		} else if (message.getEncryption() == Message.ENCRYPTION_PGP) {
-			return new Pair<>(context.getString(R.string.encrypted_message_received),true);
+			return new Pair<>(context.getString(R.string.pgp_message),true);
+		} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTION_FAILED) {
+			return new Pair<>(context.getString(R.string.decryption_failed), true);
 		} else if (message.getType() == Message.TYPE_FILE || message.getType() == Message.TYPE_IMAGE) {
 			if (message.getStatus() == Message.STATUS_RECEIVED) {
 				return new Pair<>(context.getString(R.string.received_x_file,
@@ -254,15 +239,15 @@ public class UIHelper {
 		}
 	}
 
-	public static String getStatusColor(int status) {
+	public static String getStatusColor(Presence.Status status) {
 		switch (status) {
-			case Presences.ONLINE:
-			case Presences.CHAT:
+			case ONLINE:
+			case CHAT:
 				return "#259B23";
-			case Presences.AWAY:
-			case Presences.XA:
+			case AWAY:
+			case XA:
 				return "#FF9800";
-			case Presences.DND:
+			case DND:
 				return "#E51C23";
 		}
 		return "#CCCCCC";
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/Xmlns.java b/src/main/java/de/thedevstack/conversationsplus/utils/Xmlns.java
index 85f99c30..f937e35f 100644
--- a/src/main/java/de/thedevstack/conversationsplus/utils/Xmlns.java
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/Xmlns.java
@@ -1,9 +1,11 @@
 package de.thedevstack.conversationsplus.utils;
 
+import de.thedevstack.conversationsplus.Config;
+
 public final class Xmlns {
 	public static final String BLOCKING = "urn:xmpp:blocking";
 	public static final String ROSTER = "jabber:iq:roster";
 	public static final String REGISTER = "jabber:iq:register";
 	public static final String BYTE_STREAMS = "http://jabber.org/protocol/bytestreams";
-	public static final String HTTP_UPLOAD = "urn:xmpp:http:upload";
+	public static final String HTTP_UPLOAD = Config.LEGACY_NAMESPACE_HTTP_UPLOAD ? "eu:siacs:conversations:http:upload" : "urn:xmpp:http:upload";
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/XmppSendUtil.java b/src/main/java/de/thedevstack/conversationsplus/utils/XmppSendUtil.java
index eb3c5da4..11d05832 100644
--- a/src/main/java/de/thedevstack/conversationsplus/utils/XmppSendUtil.java
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/XmppSendUtil.java
@@ -4,6 +4,7 @@ import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.xmpp.OnIqPacketReceived;
 import de.thedevstack.conversationsplus.xmpp.XmppConnection;
 import de.thedevstack.conversationsplus.xmpp.stanzas.IqPacket;
+import de.thedevstack.conversationsplus.xmpp.stanzas.MessagePacket;
 import de.thedevstack.conversationsplus.xmpp.stanzas.PresencePacket;
 
 /**
@@ -23,4 +24,11 @@ public class XmppSendUtil {
             connection.sendPresencePacket(packet);
         }
     }
+
+    public static void sendMessagePacket(Account account, MessagePacket packet) {
+        XmppConnection connection = account.getXmppConnection();
+        if (connection != null) {
+            connection.sendMessagePacket(packet);
+        }
+    }
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/xml/Element.java b/src/main/java/de/thedevstack/conversationsplus/xml/Element.java
index 3d2c75b0..429f98db 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xml/Element.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xml/Element.java
@@ -11,15 +11,20 @@ import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 
 public class Element {
-	protected String name;
-	protected Hashtable<String, String> attributes = new Hashtable<>();
-	protected String content;
+	private final String name;
+	private Hashtable<String, String> attributes = new Hashtable<>();
+	private String content;
 	protected List<Element> children = new ArrayList<>();
 
 	public Element(String name) {
 		this.name = name;
 	}
 
+	public Element(String name, String xmlns) {
+		this.name = name;
+		this.setAttribute("xmlns", xmlns);
+	}
+
 	public Element addChild(Element child) {
 		this.content = null;
 		children.add(child);
@@ -63,10 +68,9 @@ public class Element {
 
 	public Element findChild(String name, String xmlns) {
 		for (Element child : this.children) {
-			if (child.getName().equals(name)
-					&& (child.getAttribute("xmlns").equals(xmlns))) {
+			if (name.equals(child.getName()) && xmlns.equals(child.getAttribute("xmlns"))) {
 				return child;
-					}
+			}
 		}
 		return null;
 	}
@@ -93,7 +97,7 @@ public class Element {
 		return this;
 	}
 
-	public String getContent() {
+	public final String getContent() {
 		return content;
 	}
 
@@ -157,7 +161,7 @@ public class Element {
 		return elementOutput.toString();
 	}
 
-	public String getName() {
+	public final String getName() {
 		return name;
 	}
 
@@ -177,4 +181,8 @@ public class Element {
 		String attr = getAttribute(name);
 		return (attr != null && (attr.equalsIgnoreCase("true") || attr.equalsIgnoreCase("1")));
 	}
+
+	public String getNamespace() {
+		return getAttribute("xmlns");
+	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/xml/XmlReader.java b/src/main/java/de/thedevstack/conversationsplus/xml/XmlReader.java
index 35425816..e02f4fc0 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xml/XmlReader.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xml/XmlReader.java
@@ -1,19 +1,19 @@
 package de.thedevstack.conversationsplus.xml;
 
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
+import android.os.PowerManager;
+import android.os.PowerManager.WakeLock;
+import android.util.Xml;
 
 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
 
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+
 import de.thedevstack.android.logcat.Logging;
 import de.thedevstack.conversationsplus.Config;
 
-import android.os.PowerManager;
-import android.os.PowerManager.WakeLock;
-import android.util.Xml;
-
 public class XmlReader {
 	private XmlPullParser parser;
 	private PowerManager.WakeLock wakeLock;
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/OnKeyStatusUpdated.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/OnKeyStatusUpdated.java
new file mode 100644
index 00000000..47bcff9e
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/OnKeyStatusUpdated.java
@@ -0,0 +1,7 @@
+package de.thedevstack.conversationsplus.xmpp;
+
+import de.thedevstack.conversationsplus.crypto.axolotl.AxolotlService;
+
+public interface OnKeyStatusUpdated {
+	public void onKeyStatusUpdated(AxolotlService.FetchStatus report);
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/XmppConnection.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/XmppConnection.java
index d5ab9f90..29be84f5 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/XmppConnection.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/XmppConnection.java
@@ -1,66 +1,80 @@
 package de.thedevstack.conversationsplus.xmpp;
 
-import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
 import android.os.PowerManager;
 import android.os.PowerManager.WakeLock;
 import android.os.SystemClock;
+import android.security.KeyChain;
+import android.util.Base64;
+import android.util.Log;
 import android.util.Pair;
 import android.util.SparseArray;
 
-import org.apache.http.conn.ssl.StrictHostnameVerifier;
 import org.json.JSONException;
 import org.json.JSONObject;
 import org.xmlpull.v1.XmlPullParserException;
 
+import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.InputStream;
-import java.io.OutputStream;
 import java.math.BigInteger;
 import java.net.ConnectException;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.net.Socket;
 import java.net.UnknownHostException;
+import java.net.URL;
 import java.security.KeyManagementException;
 import java.security.NoSuchAlgorithmException;
+import java.security.Principal;
+import java.security.PrivateKey;
+import java.security.cert.X509Certificate;
 import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collection;
 import java.util.HashMap;
 import java.util.Hashtable;
-import java.util.LinkedList;
+import java.util.Iterator;
 import java.util.List;
-import java.util.Map;
 import java.util.Map.Entry;
 import java.util.TreeSet;
 
 import javax.net.ssl.HostnameVerifier;
+import javax.net.ssl.KeyManager;
 import javax.net.ssl.SSLContext;
 import javax.net.ssl.SSLSocket;
 import javax.net.ssl.SSLSocketFactory;
+import javax.net.ssl.X509KeyManager;
 import javax.net.ssl.X509TrustManager;
 
+import de.duenndns.ssl.MemorizingTrustManager;
 import de.thedevstack.android.logcat.Logging;
+import de.thedevstack.conversationsplus.dto.SrvRecord;
 import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.crypto.XmppDomainVerifier;
 import de.thedevstack.conversationsplus.crypto.sasl.DigestMd5;
+import de.thedevstack.conversationsplus.crypto.sasl.External;
 import de.thedevstack.conversationsplus.crypto.sasl.Plain;
 import de.thedevstack.conversationsplus.crypto.sasl.SaslMechanism;
 import de.thedevstack.conversationsplus.crypto.sasl.ScramSha1;
-import de.thedevstack.conversationsplus.dto.SrvRecord;
 import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.entities.ServiceDiscoveryResult;
 import de.thedevstack.conversationsplus.generator.IqGenerator;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
-import de.thedevstack.conversationsplus.utils.CryptoHelper;
 import de.thedevstack.conversationsplus.utils.DNSHelper;
+import de.thedevstack.conversationsplus.utils.SSLSocketHelper;
 import de.thedevstack.conversationsplus.utils.Xmlns;
 import de.thedevstack.conversationsplus.xml.Element;
 import de.thedevstack.conversationsplus.xml.Tag;
 import de.thedevstack.conversationsplus.xml.TagWriter;
 import de.thedevstack.conversationsplus.xml.XmlReader;
+import de.thedevstack.conversationsplus.xmpp.forms.Data;
+import de.thedevstack.conversationsplus.xmpp.forms.Field;
 import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 import de.thedevstack.conversationsplus.xmpp.jingle.OnJinglePacketReceived;
 import de.thedevstack.conversationsplus.xmpp.jingle.stanzas.JinglePacket;
+import de.thedevstack.conversationsplus.xmpp.stanzas.AbstractAcknowledgeableStanza;
 import de.thedevstack.conversationsplus.xmpp.stanzas.AbstractStanza;
 import de.thedevstack.conversationsplus.xmpp.stanzas.IqPacket;
 import de.thedevstack.conversationsplus.xmpp.stanzas.MessagePacket;
@@ -83,14 +97,14 @@ public class XmppConnection implements Runnable {
 	private XmlReader tagReader;
 	private TagWriter tagWriter;
 	private final Features features = new Features(this);
-	private boolean shouldBind = true;
+	private boolean needsBinding = true;
 	private boolean shouldAuthenticate = true;
 	private Element streamFeatures;
-	private final HashMap<Jid, Info> disco = new HashMap<>();
+	private final HashMap<Jid, ServiceDiscoveryResult> disco = new HashMap<>();
 
 	private String streamId = null;
 	private int smVersion = 3;
-	private final SparseArray<String> messageReceipts = new SparseArray<>();
+	private final SparseArray<AbstractAcknowledgeableStanza> mStanzaQueue = new SparseArray<>();
 
 	private int stanzasReceived = 0;
 	private int stanzasSent = 0;
@@ -98,8 +112,12 @@ public class XmppConnection implements Runnable {
 	private long lastPingSent = 0;
 	private long lastConnect = 0;
 	private long lastSessionStarted = 0;
+	private long lastDiscoStarted = 0;
+	private int mPendingServiceDiscoveries = 0;
+	private final ArrayList<String> mPendingServiceDiscoveriesIds = new ArrayList<>();
+	private boolean mInteractive = false;
 	private int attempt = 0;
-	private final Map<String, Pair<IqPacket, OnIqPacketReceived>> packetCallbacks = new Hashtable<>();
+	private final Hashtable<String, Pair<IqPacket, OnIqPacketReceived>> packetCallbacks = new Hashtable<>();
 	private OnPresencePacketReceived presenceListener = null;
 	private OnJinglePacketReceived jingleListener = null;
 	private OnIqPacketReceived unregisteredIqListener = null;
@@ -112,6 +130,68 @@ public class XmppConnection implements Runnable {
 
 	private SaslMechanism saslMechanism;
 
+	private X509KeyManager mKeyManager = new X509KeyManager() {
+		@Override
+		public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
+			return account.getPrivateKeyAlias();
+		}
+
+		@Override
+		public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
+			return null;
+		}
+
+		@Override
+		public X509Certificate[] getCertificateChain(String alias) {
+			try {
+				return KeyChain.getCertificateChain(mXmppConnectionService, alias);
+			} catch (Exception e) {
+				return new X509Certificate[0];
+			}
+		}
+
+		@Override
+		public String[] getClientAliases(String s, Principal[] principals) {
+			return new String[0];
+		}
+
+		@Override
+		public String[] getServerAliases(String s, Principal[] principals) {
+			return new String[0];
+		}
+
+		@Override
+		public PrivateKey getPrivateKey(String alias) {
+			try {
+				return KeyChain.getPrivateKey(mXmppConnectionService, alias);
+			} catch (Exception e) {
+				return null;
+			}
+		}
+	};
+	private Identity mServerIdentity = Identity.UNKNOWN;
+
+	private OnIqPacketReceived createPacketReceiveHandler() {
+		return new OnIqPacketReceived() {
+			@Override
+			public void onIqPacketReceived(Account account, IqPacket packet) {
+				if (packet.getType() == IqPacket.TYPE.RESULT) {
+					account.setOption(Account.OPTION_REGISTER,
+							false);
+					changeStatus(Account.State.REGISTRATION_SUCCESSFUL);
+				} else if (packet.hasChild("error")
+						&& (packet.findChild("error")
+						.hasChild("conflict"))) {
+					changeStatus(Account.State.REGISTRATION_CONFLICT);
+				} else {
+					changeStatus(Account.State.REGISTRATION_FAILED);
+					Log.d(Config.LOGTAG, packet.toString());
+				}
+				disconnect(true);
+			}
+		};
+	}
+
 	public XmppConnection(final Account account, final XmppConnectionService service) {
 		this.account = account;
 		this.wakeLock = service.getPowerManager().newWakeLock(
@@ -143,59 +223,92 @@ public class XmppConnection implements Runnable {
 		features.encryptionEnabled = false;
 		lastConnect = SystemClock.elapsedRealtime();
 		lastPingSent = SystemClock.elapsedRealtime();
+		lastDiscoStarted = Long.MAX_VALUE;
 		this.attempt++;
+		switch (account.getJid().getDomainpart()) {
+			case "chat.facebook.com":
+				mServerIdentity = Identity.FACEBOOK;
+				break;
+			case "nimbuzz.com":
+				mServerIdentity = Identity.NIMBUZZ;
+				break;
+			default:
+				mServerIdentity = Identity.UNKNOWN;
+				break;
+		}
 		try {
-			shouldAuthenticate = shouldBind = !account.isOptionSet(Account.OPTION_REGISTER);
+			shouldAuthenticate = needsBinding = !account.isOptionSet(Account.OPTION_REGISTER);
 			tagReader = new XmlReader(wakeLock);
 			tagWriter = new TagWriter();
-			packetCallbacks.clear();
 			this.changeStatus(Account.State.CONNECTING);
-			if (DNSHelper.isIp(account.getServer().toString())) {
+			final boolean extended = mXmppConnectionService.showExtendedConnectionOptions();
+            if (extended && account.getHostname() != null && !account.getHostname().isEmpty()) {
+				socket = new Socket();
+				try {
+					socket.connect(new InetSocketAddress(account.getHostname(), account.getPort()), Config.SOCKET_TIMEOUT * 1000);
+				} catch (IOException e) {
+					throw new UnknownHostException();
+				}
+				startXmpp();
+			} else if (DNSHelper.isIp(account.getServer().toString())) {
 				socket = new Socket();
 				try {
 					socket.connect(new InetSocketAddress(account.getServer().toString(), DEFAULT_PORT), Config.SOCKET_TIMEOUT * 1000);
 				} catch (IOException e) {
 					throw new UnknownHostException();
 				}
+				startXmpp();
 			} else {
-                socket = new Socket();
-                TreeSet<SrvRecord> result = DNSHelper.querySrvRecord(account.getServer());
-                if (!result.isEmpty()) {
-                    for (SrvRecord record : result) {
-                        try {
-                            socket.connect(new InetSocketAddress(record.getName(), record.getPort()), Config.SOCKET_TIMEOUT * 1000);
-                            break;
-                        } catch (IOException e) {
-                            Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
-                        }
-                    }
-                }
-                if (result.isEmpty() || !socket.isConnected()){
+				final TreeSet<SrvRecord> srvRecords = DNSHelper.querySrvRecord(account.getServer());
+                if (srvRecords.isEmpty()) {
+                    socket = new Socket();
                     try {
                         socket.connect(new InetSocketAddress(account.getServer().getDomainpart(), DEFAULT_PORT), Config.SOCKET_TIMEOUT * 1000);
                     } catch (IOException e) {
                         throw new UnknownHostException();
                     }
+                    startXmpp();
+                } else {
+                    for (SrvRecord srvRecord : srvRecords) {
+                        // if tls is true, encryption is implied and must not be started
+                        features.encryptionEnabled = srvRecord.isUseTls();
+                        TlsFactoryVerifier tlsFactoryVerifier = null;
+                        if (features.encryptionEnabled) {
+                            try {
+                                tlsFactoryVerifier = getTlsFactoryVerifier();
+                                socket = tlsFactoryVerifier.factory.createSocket();
+
+                                if (socket == null) {
+                                    throw new IOException("could not initialize ssl socket");
+                                }
+
+                                SSLSocketHelper.setSecurity((SSLSocket) socket);
+                                SSLSocketHelper.setSNIHost(tlsFactoryVerifier.factory, (SSLSocket) socket, account.getServer().getDomainpart());
+                                SSLSocketHelper.setAlpnProtocol(tlsFactoryVerifier.factory, (SSLSocket) socket, "xmpp-client");
+                            } catch (SecurityException e) {
+                                throw e;
+                            } catch (KeyManagementException e) {
+                                Logging.e("connection-init", "Error while creating TLS verifier factory: " + e.getMessage(), e);
+                                throw new SecurityException();
+                            }
+                        } else {
+                            socket = new Socket();
+                        }
+
+                        socket.connect(new InetSocketAddress(srvRecord.getName(), srvRecord.getPort()), Config.SOCKET_TIMEOUT * 1000);
+
+                        if (null != tlsFactoryVerifier && !tlsFactoryVerifier.verifier.verify(account.getServer().getDomainpart(), ((SSLSocket) socket).getSession())) {
+                            Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": TLS certificate verification failed");
+                            throw new SecurityException();
+                        }
+
+                        if (startXmpp()) {
+                            break; // successfully connected to server that speaks xmpp
+                        }
+                    }
                 }
 			}
-			final OutputStream out = socket.getOutputStream();
-			tagWriter.setOutputStream(out);
-			final InputStream in = socket.getInputStream();
-			tagReader.setInputStream(in);
-			tagWriter.beginDocument();
-			sendStartStream();
-			Tag nextTag;
-			while ((nextTag = tagReader.readTag()) != null) {
-				if (nextTag.isStart("stream")) {
-					processStream(nextTag);
-					break;
-				} else {
-					throw new IOException("unknown tag on connect");
-				}
-			}
-			if (socket.isConnected()) {
-				socket.close();
-			}
+			processStream();
 		} catch (final IncompatibleServerException e) {
 			this.changeStatus(Account.State.INCOMPATIBLE_SERVER);
 		} catch (final SecurityException e) {
@@ -209,13 +322,7 @@ public class XmppConnection implements Runnable {
 			this.changeStatus(Account.State.OFFLINE);
 			this.attempt--; //don't count attempt when reconnecting instantly anyway
 		} finally {
-			if (socket != null) {
-				try {
-					socket.close();
-				} catch (IOException e) {
-
-				}
-			}
+			forceCloseSocket();
 			if (wakeLock.isHeld()) {
 				try {
 					wakeLock.release();
@@ -225,165 +332,213 @@ public class XmppConnection implements Runnable {
 		}
 	}
 
-	@Override
-	public void run() {
-		try {
-			if (socket != null) {
-				socket.close();
+	/**
+	 * Starts xmpp protocol, call after connecting to socket
+	 * @return true if server returns with valid xmpp, false otherwise
+	 * @throws IOException Unknown tag on connect
+	 * @throws XmlPullParserException Bad Xml
+	 * @throws NoSuchAlgorithmException Other error
+     */
+	private boolean startXmpp() throws IOException, XmlPullParserException, NoSuchAlgorithmException {
+		tagWriter.setOutputStream(socket.getOutputStream());
+		tagReader.setInputStream(socket.getInputStream());
+		tagWriter.beginDocument();
+		sendStartStream();
+		Tag nextTag;
+		while ((nextTag = tagReader.readTag()) != null) {
+			if (nextTag.isStart("stream")) {
+				return true;
+			} else {
+				throw new IOException("unknown tag on connect");
+			}
+		}
+		if (socket.isConnected()) {
+			socket.close();
+		}
+		return false;
+	}
+
+	private static class TlsFactoryVerifier {
+		private final SSLSocketFactory factory;
+		private final HostnameVerifier verifier;
+
+		public TlsFactoryVerifier(final SSLSocketFactory factory, final HostnameVerifier verifier) throws IOException {
+			this.factory = factory;
+			this.verifier = verifier;
+			if (factory == null || verifier == null) {
+				throw new IOException("could not setup ssl");
 			}
-		} catch (final IOException ignored) {
+		}
+	}
 
+	private TlsFactoryVerifier getTlsFactoryVerifier() throws NoSuchAlgorithmException, KeyManagementException, IOException {
+		final SSLContext sc = SSLSocketHelper.getSSLContext();
+		MemorizingTrustManager trustManager = this.mXmppConnectionService.getMemorizingTrustManager();
+		KeyManager[] keyManager;
+		if (account.getPrivateKeyAlias() != null && account.getPassword().isEmpty()) {
+			keyManager = new KeyManager[]{mKeyManager};
+		} else {
+			keyManager = null;
+		}
+		sc.init(keyManager, new X509TrustManager[]{mInteractive ? trustManager : trustManager.getNonInteractive()}, mXmppConnectionService.getRNG());
+		final SSLSocketFactory factory = sc.getSocketFactory();
+		final HostnameVerifier verifier;
+		if (mInteractive) {
+			verifier = trustManager.wrapHostnameVerifier(new XmppDomainVerifier());
+		} else {
+			verifier = trustManager.wrapHostnameVerifierNonInteractive(new XmppDomainVerifier());
 		}
+
+		return new TlsFactoryVerifier(factory, verifier);
+	}
+
+	@Override
+	public void run() {
+		forceCloseSocket();
 		connect();
 	}
 
-	private void processStream(final Tag currentTag) throws XmlPullParserException,
-					IOException, NoSuchAlgorithmException {
-						Tag nextTag = tagReader.readTag();
-
-						while ((nextTag != null) && (!nextTag.isEnd("stream"))) {
-							if (nextTag.isStart("error")) {
-								processStreamError(nextTag);
-							} else if (nextTag.isStart("features")) {
-								processStreamFeatures(nextTag);
-							} else if (nextTag.isStart("proceed")) {
-								switchOverToTls(nextTag);
-							} else if (nextTag.isStart("success")) {
-								final String challenge = tagReader.readElement(nextTag).getContent();
-								try {
-									saslMechanism.getResponse(challenge);
-								} catch (final SaslMechanism.AuthenticationException e) {
-									disconnect(true);
-									Logging.e(Config.LOGTAG, String.valueOf(e));
-								}
-								Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": logged in");
-								account.setKey(Account.PINNED_MECHANISM_KEY,
-										String.valueOf(saslMechanism.getPriority()));
-								tagReader.reset();
-								sendStartStream();
-								processStream(tagReader.readTag());
-								break;
-							} else if (nextTag.isStart("failure")) {
-								throw new UnauthorizedException();
-							} else if (nextTag.isStart("challenge")) {
-								final String challenge = tagReader.readElement(nextTag).getContent();
-								final Element response = new Element("response");
-								response.setAttribute("xmlns",
-										"urn:ietf:params:xml:ns:xmpp-sasl");
-								try {
-									response.setContent(saslMechanism.getResponse(challenge));
-								} catch (final SaslMechanism.AuthenticationException e) {
-									// TODO: Send auth abort tag.
-									Logging.e(Config.LOGTAG, e.toString());
-								}
-								tagWriter.writeElement(response);
-							} else if (nextTag.isStart("enabled")) {
-								final Element enabled = tagReader.readElement(nextTag);
-								if ("true".equals(enabled.getAttribute("resume"))) {
-									this.streamId = enabled.getAttribute("id");
-									Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString()
-											+ ": stream managment(" + smVersion
-											+ ") enabled (resumable)");
-								} else {
-									Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString()
-											+ ": stream managment(" + smVersion + ") enabled");
-								}
-								this.lastSessionStarted = SystemClock.elapsedRealtime();
-								this.stanzasReceived = 0;
-								final RequestPacket r = new RequestPacket(smVersion);
-								tagWriter.writeStanzaAsync(r);
-							} else if (nextTag.isStart("resumed")) {
-								lastPacketReceived = SystemClock.elapsedRealtime();
-								final Element resumed = tagReader.readElement(nextTag);
-								final String h = resumed.getAttribute("h");
-								try {
-									final int serverCount = Integer.parseInt(h);
-									if (serverCount != stanzasSent) {
-										Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString()
-												+ ": session resumed with lost packages");
-										stanzasSent = serverCount;
-									} else {
-										Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString()
-												+ ": session resumed");
-									}
-									if (acknowledgedListener != null) {
-										for (int i = 0; i < messageReceipts.size(); ++i) {
-											if (serverCount >= messageReceipts.keyAt(i)) {
-												acknowledgedListener.onMessageAcknowledged(
-														account, messageReceipts.valueAt(i));
-											}
-										}
-									}
-									messageReceipts.clear();
-								} catch (final NumberFormatException ignored) {
-								}
-								sendServiceDiscoveryInfo(account.getServer());
-								sendServiceDiscoveryInfo(account.getJid().toBareJid());
-								sendServiceDiscoveryItems(account.getServer());
-								sendInitialPing();
-							} else if (nextTag.isStart("r")) {
-								tagReader.readElement(nextTag);
-								if (Config.EXTENDED_SM_LOGGING) {
-									Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": acknowledging stanza #" + this.stanzasReceived);
-								}
-								final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
-								tagWriter.writeStanzaAsync(ack);
-							} else if (nextTag.isStart("a")) {
-								final Element ack = tagReader.readElement(nextTag);
-								lastPacketReceived = SystemClock.elapsedRealtime();
-								try {
-									final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
-									if (Config.EXTENDED_SM_LOGGING) {
-										Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": server acknowledged stanza #" + serverSequence);
-									}
-									final String msgId = this.messageReceipts.get(serverSequence);
-									if (msgId != null) {
-										if (this.acknowledgedListener != null) {
-											this.acknowledgedListener.onMessageAcknowledged(
-													account, msgId);
-										}
-										this.messageReceipts.remove(serverSequence);
-									}
-								} catch (NumberFormatException e) {
-									Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": server send ack without sequence number");
-								}
-							} else if (nextTag.isStart("failed")) {
-								tagReader.readElement(nextTag);
-								Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": resumption failed");
-								streamId = null;
-								if (account.getStatus() != Account.State.ONLINE) {
-									sendBindRequest();
-								}
-							} else if (nextTag.isStart("iq")) {
-								processIq(nextTag);
-							} else if (nextTag.isStart("message")) {
-								processMessage(nextTag);
-							} else if (nextTag.isStart("presence")) {
-								processPresence(nextTag);
-							}
-							nextTag = tagReader.readTag();
-						}
-						if (account.getStatus() == Account.State.ONLINE) {
-							account. setStatus(Account.State.OFFLINE);
-							if (statusListener != null) {
-								statusListener.onStatusChanged(account);
-							}
+	private void processStream() throws XmlPullParserException, IOException, NoSuchAlgorithmException {
+		Tag nextTag = tagReader.readTag();
+		while (nextTag != null && !nextTag.isEnd("stream")) {
+			if (nextTag.isStart("error")) {
+				processStreamError(nextTag);
+			} else if (nextTag.isStart("features")) {
+				processStreamFeatures(nextTag);
+			} else if (nextTag.isStart("proceed")) {
+				switchOverToTls(nextTag);
+			} else if (nextTag.isStart("success")) {
+				final String challenge = tagReader.readElement(nextTag).getContent();
+				try {
+					saslMechanism.getResponse(challenge);
+				} catch (final SaslMechanism.AuthenticationException e) {
+					disconnect(true);
+					Log.e(Config.LOGTAG, String.valueOf(e));
+				}
+				Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": logged in");
+				account.setKey(Account.PINNED_MECHANISM_KEY,
+						String.valueOf(saslMechanism.getPriority()));
+				tagReader.reset();
+				sendStartStream();
+				final Tag tag = tagReader.readTag();
+				if (tag != null && tag.isStart("stream")) {
+					processStream();
+				} else {
+					throw new IOException("server didn't restart stream after successful auth");
+				}
+				break;
+			} else if (nextTag.isStart("failure")) {
+				throw new UnauthorizedException();
+			} else if (nextTag.isStart("challenge")) {
+				final String challenge = tagReader.readElement(nextTag).getContent();
+				final Element response = new Element("response");
+				response.setAttribute("xmlns",
+						"urn:ietf:params:xml:ns:xmpp-sasl");
+				try {
+					response.setContent(saslMechanism.getResponse(challenge));
+				} catch (final SaslMechanism.AuthenticationException e) {
+					// TODO: Send auth abort tag.
+					Log.e(Config.LOGTAG, e.toString());
+				}
+				tagWriter.writeElement(response);
+			} else if (nextTag.isStart("enabled")) {
+				final Element enabled = tagReader.readElement(nextTag);
+				if ("true".equals(enabled.getAttribute("resume"))) {
+					this.streamId = enabled.getAttribute("id");
+					Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
+							+ ": stream managment(" + smVersion
+							+ ") enabled (resumable)");
+				} else {
+					Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
+							+ ": stream management(" + smVersion + ") enabled");
+				}
+				this.stanzasReceived = 0;
+				final RequestPacket r = new RequestPacket(smVersion);
+				tagWriter.writeStanzaAsync(r);
+			} else if (nextTag.isStart("resumed")) {
+				lastPacketReceived = SystemClock.elapsedRealtime();
+				final Element resumed = tagReader.readElement(nextTag);
+				final String h = resumed.getAttribute("h");
+				try {
+					final int serverCount = Integer.parseInt(h);
+					if (serverCount != stanzasSent) {
+						Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
+								+ ": session resumed with lost packages");
+						stanzasSent = serverCount;
+					} else {
+						Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": session resumed");
+					}
+					acknowledgeStanzaUpTo(serverCount);
+					ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
+					for(int i = 0; i < this.mStanzaQueue.size(); ++i) {
+						failedStanzas.add(mStanzaQueue.valueAt(i));
+					}
+					mStanzaQueue.clear();
+					Log.d(Config.LOGTAG,"resending "+failedStanzas.size()+" stanzas");
+					for(AbstractAcknowledgeableStanza packet : failedStanzas) {
+						if (packet instanceof MessagePacket) {
+							MessagePacket message = (MessagePacket) packet;
+							mXmppConnectionService.markMessage(account,
+									message.getTo().toBareJid(),
+									message.getId(),
+									Message.STATUS_UNSEND);
 						}
+						sendPacket(packet);
+					}
+				} catch (final NumberFormatException ignored) {
+				}
+				Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": online with resource " + account.getResource());
+				changeStatus(Account.State.ONLINE);
+			} else if (nextTag.isStart("r")) {
+				tagReader.readElement(nextTag);
+				if (Config.EXTENDED_SM_LOGGING) {
+					Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": acknowledging stanza #" + this.stanzasReceived);
+				}
+				final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
+				tagWriter.writeStanzaAsync(ack);
+			} else if (nextTag.isStart("a")) {
+				final Element ack = tagReader.readElement(nextTag);
+				lastPacketReceived = SystemClock.elapsedRealtime();
+				try {
+					final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
+					acknowledgeStanzaUpTo(serverSequence);
+				} catch (NumberFormatException e) {
+					Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server send ack without sequence number");
+				}
+			} else if (nextTag.isStart("failed")) {
+				tagReader.readElement(nextTag);
+				Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": resumption failed");
+				resetStreamId();
+				if (account.getStatus() != Account.State.ONLINE) {
+					sendBindRequest();
+				}
+			} else if (nextTag.isStart("iq")) {
+				processIq(nextTag);
+			} else if (nextTag.isStart("message")) {
+				processMessage(nextTag);
+			} else if (nextTag.isStart("presence")) {
+				processPresence(nextTag);
+			}
+			nextTag = tagReader.readTag();
+		}
+		throw new IOException("reached end of stream. last tag was "+nextTag);
 	}
 
-	private void sendInitialPing() {
-		Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": sending intial ping");
-		final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
-		iq.setFrom(account.getJid());
-		iq.addChild("ping", "urn:xmpp:ping");
-		this.sendIqPacket(iq, new OnIqPacketReceived() {
-			@Override
-			public void onIqPacketReceived(final Account account, final IqPacket packet) {
-				Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString()
-						+ ": online with resource " + account.getResource());
-				changeStatus(Account.State.ONLINE);
+	private void acknowledgeStanzaUpTo(int serverCount) {
+		for (int i = 0; i < mStanzaQueue.size(); ++i) {
+			if (serverCount >= mStanzaQueue.keyAt(i)) {
+				if (Config.EXTENDED_SM_LOGGING) {
+					Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": server acknowledged stanza #" + mStanzaQueue.keyAt(i));
+				}
+				AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
+				if (stanza instanceof MessagePacket && acknowledgedListener != null) {
+					MessagePacket packet = (MessagePacket) stanza;
+					acknowledgedListener.onMessageAcknowledged(account, packet.getId());
+				}
+				mStanzaQueue.removeAt(i);
+				i--;
 			}
-		});
+		}
 	}
 
 	private Element processPacket(final Tag currentTag, final int packetType)
@@ -446,26 +601,32 @@ public class XmppConnection implements Runnable {
 				this.jingleListener.onJinglePacketReceived(account,(JinglePacket) packet);
 			}
 		} else {
-			if (packetCallbacks.containsKey(packet.getId())) {
-				final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
-				// Packets to the server should have responses from the server
-				if (packetCallbackDuple.first.toServer(account)) {
-					if (packet.fromServer(account)) {
-						packetCallbackDuple.second.onIqPacketReceived(account, packet);
-						packetCallbacks.remove(packet.getId());
-					} else {
-						Logging.e(Config.LOGTAG,account.getJid().toBareJid().toString()+": ignoring spoofed iq packet");
-					}
-				} else {
-					if (packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
-						packetCallbackDuple.second.onIqPacketReceived(account, packet);
-						packetCallbacks.remove(packet.getId());
+			OnIqPacketReceived callback = null;
+			synchronized (this.packetCallbacks) {
+				if (packetCallbacks.containsKey(packet.getId())) {
+					final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
+					// Packets to the server should have responses from the server
+					if (packetCallbackDuple.first.toServer(account)) {
+						if (packet.fromServer(account) || mServerIdentity == Identity.FACEBOOK) {
+							callback = packetCallbackDuple.second;
+							packetCallbacks.remove(packet.getId());
+						} else {
+							Log.e(Config.LOGTAG, account.getJid().toBareJid().toString() + ": ignoring spoofed iq packet");
+						}
 					} else {
-						Logging.e(Config.LOGTAG,account.getJid().toBareJid().toString()+": ignoring spoofed iq packet");
+						if (packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
+							callback = packetCallbackDuple.second;
+							packetCallbacks.remove(packet.getId());
+						} else {
+							Logging.e(Config.LOGTAG, account.getJid().toBareJid().toString() + ": ignoring spoofed iq packet");
+						}
 					}
+				} else if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
+					callback = this.unregisteredIqListener;
 				}
-			} else if (packet.getType() == IqPacket.TYPE.GET|| packet.getType() == IqPacket.TYPE.SET) {
-				this.unregisteredIqListener.onIqPacketReceived(account, packet);
+			}
+			if (callback != null) {
+				callback.onIqPacketReceived(account,packet);
 			}
 		}
 	}
@@ -486,53 +647,44 @@ public class XmppConnection implements Runnable {
 		tagWriter.writeTag(startTLS);
 	}
 
+
+
 	private void switchOverToTls(final Tag currentTag) throws XmlPullParserException, IOException {
 		tagReader.readTag();
 		try {
-			final SSLContext sc = SSLContext.getInstance("TLS");
-			sc.init(null,new X509TrustManager[]{this.mXmppConnectionService.getMemorizingTrustManager()},mXmppConnectionService.getRNG());
-			final SSLSocketFactory factory = sc.getSocketFactory();
-			final HostnameVerifier verifier = this.mXmppConnectionService.getMemorizingTrustManager().wrapHostnameVerifier(new StrictHostnameVerifier());
+			final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
 			final InetAddress address = socket == null ? null : socket.getInetAddress();
 
-			if (factory == null || address == null || verifier == null) {
+			if (address == null) {
 				throw new IOException("could not setup ssl");
 			}
 
-			final SSLSocket sslSocket = (SSLSocket) factory.createSocket(socket,address.getHostAddress(), socket.getPort(),true);
+			final SSLSocket sslSocket = (SSLSocket) tlsFactoryVerifier.factory.createSocket(socket, address.getHostAddress(), socket.getPort(), true);
 
 			if (sslSocket == null) {
 				throw new IOException("could not initialize ssl socket");
 			}
 
-			final String[] supportProtocols;
-			final Collection<String> supportedProtocols = new LinkedList<>(
-					Arrays.asList(sslSocket.getSupportedProtocols()));
-			supportedProtocols.remove("SSLv3");
-			supportProtocols = supportedProtocols.toArray(new String[supportedProtocols.size()]);
-
-			sslSocket.setEnabledProtocols(supportProtocols);
-
-			final String[] cipherSuites = CryptoHelper.getOrderedCipherSuites(
-					sslSocket.getSupportedCipherSuites());
-			//Logging.d(Config.LOGTAG, "Using ciphers: " + Arrays.toString(cipherSuites));
-			if (cipherSuites.length > 0) {
-				sslSocket.setEnabledCipherSuites(cipherSuites);
-			}
+			SSLSocketHelper.setSecurity(sslSocket);
 
-			if (!verifier.verify(account.getServer().getDomainpart(),sslSocket.getSession())) {
-				Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
+			if (!tlsFactoryVerifier.verifier.verify(account.getServer().getDomainpart(), sslSocket.getSession())) {
+				Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
 				throw new SecurityException();
 			}
 			tagReader.setInputStream(sslSocket.getInputStream());
 			tagWriter.setOutputStream(sslSocket.getOutputStream());
 			sendStartStream();
-			Logging.d(Config.LOGTAG, account.getJid().toBareJid()+ ": TLS connection established");
+			Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": TLS connection established");
 			features.encryptionEnabled = true;
-			processStream(tagReader.readTag());
+			final Tag tag = tagReader.readTag();
+			if (tag != null && tag.isStart("stream")) {
+				processStream();
+			} else {
+				throw new IOException("server didn't restart stream after STARTTLS");
+			}
 			sslSocket.close();
 		} catch (final NoSuchAlgorithmException | KeyManagementException e1) {
-			Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
+			Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": TLS certificate verification failed");
 			throw new SecurityException();
 		}
 	}
@@ -542,21 +694,26 @@ public class XmppConnection implements Runnable {
 		this.streamFeatures = tagReader.readElement(currentTag);
 		if (this.streamFeatures.hasChild("starttls") && !features.encryptionEnabled) {
 			sendStartTLS();
-		} else if (this.streamFeatures.hasChild("register")
-				&& account.isOptionSet(Account.OPTION_REGISTER)
-				&& features.encryptionEnabled) {
-			sendRegistryRequest();
+		} else if (this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
+			if (features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS) {
+				sendRegistryRequest();
+			} else {
+				throw new IncompatibleServerException();
+			}
 		} else if (!this.streamFeatures.hasChild("register")
 				&& account.isOptionSet(Account.OPTION_REGISTER)) {
 			changeStatus(Account.State.REGISTRATION_NOT_SUPPORTED);
 			disconnect(true);
 		} else if (this.streamFeatures.hasChild("mechanisms")
-				&& shouldAuthenticate && features.encryptionEnabled) {
+				&& shouldAuthenticate
+				&& (features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS)) {
 			final List<String> mechanisms = extractMechanisms(streamFeatures
 					.findChild("mechanisms"));
 			final Element auth = new Element("auth");
 			auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
-			if (mechanisms.contains("SCRAM-SHA-1")) {
+			if (mechanisms.contains("EXTERNAL") && account.getPrivateKeyAlias() != null) {
+				saslMechanism = new External(tagWriter, account, mXmppConnectionService.getRNG());
+			} else if (mechanisms.contains("SCRAM-SHA-1")) {
 				saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
 			} else if (mechanisms.contains("PLAIN")) {
 				saslMechanism = new Plain(tagWriter, account);
@@ -586,19 +743,18 @@ public class XmppConnection implements Runnable {
 			} else {
 				throw new IncompatibleServerException();
 			}
-		} else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:"
-					+ smVersion)
-				&& streamId != null) {
+		} else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:" + smVersion) && streamId != null) {
 			if (Config.EXTENDED_SM_LOGGING) {
 				Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": resuming after stanza #"+stanzasReceived);
 			}
 			final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
 			this.tagWriter.writeStanzaAsync(resume);
-		} else if (this.streamFeatures.hasChild("bind") && shouldBind) {
-			sendBindRequest();
-		} else {
-			disconnect(true);
-			changeStatus(Account.State.INCOMPATIBLE_SERVER);
+		} else if (needsBinding) {
+			if (this.streamFeatures.hasChild("bind")) {
+				sendBindRequest();
+			} else {
+				throw new IncompatibleServerException();
+			}
 		}
 	}
 
@@ -611,6 +767,15 @@ public class XmppConnection implements Runnable {
 		return mechanisms;
 	}
 
+	public void sendCaptchaRegistryRequest(String id, Data data) {
+		if (data == null) {
+			setAccountCreationFailed("");
+		} else {
+			IqPacket request = getIqGenerator().generateCreateAccountWithCaptcha(account, id, data);
+			sendIqPacket(request, createPacketReceiveHandler());
+		}
+	}
+
 	private void sendRegistryRequest() {
 		final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
 		register.query("jabber:iq:register");
@@ -619,59 +784,95 @@ public class XmppConnection implements Runnable {
 
 			@Override
 			public void onIqPacketReceived(final Account account, final IqPacket packet) {
-				final Element instructions = packet.query().findChild("instructions");
-				if (packet.query().hasChild("username")
+				boolean failed = false;
+				if (packet.getType() == IqPacket.TYPE.RESULT
+						&& packet.query().hasChild("username")
 						&& (packet.query().hasChild("password"))) {
 					final IqPacket register = new IqPacket(IqPacket.TYPE.SET);
 					final Element username = new Element("username").setContent(account.getUsername());
 					final Element password = new Element("password").setContent(account.getPassword());
 					register.query("jabber:iq:register").addChild(username);
 					register.query().addChild(password);
-					sendIqPacket(register, new OnIqPacketReceived() {
-
-						@Override
-						public void onIqPacketReceived(final Account account, final IqPacket packet) {
-							if (packet.getType() == IqPacket.TYPE.RESULT) {
-								account.setOption(Account.OPTION_REGISTER,
-										false);
-								changeStatus(Account.State.REGISTRATION_SUCCESSFUL);
-							} else if (packet.hasChild("error")
-									&& (packet.findChild("error")
-									.hasChild("conflict"))) {
-								changeStatus(Account.State.REGISTRATION_CONFLICT);
-							} else {
-								changeStatus(Account.State.REGISTRATION_FAILED);
-								Logging.d(Config.LOGTAG, packet.toString());
-							}
-							disconnect(true);
+					sendIqPacket(register, createPacketReceiveHandler());
+				} else if (packet.getType() == IqPacket.TYPE.RESULT
+						&& (packet.query().hasChild("x", "jabber:x:data"))) {
+					final Data data = Data.parse(packet.query().findChild("x", "jabber:x:data"));
+					final Element blob = packet.query().findChild("data", "urn:xmpp:bob");
+					final String id = packet.getId();
+
+					Bitmap captcha = null;
+					if (blob != null) {
+						try {
+							final String base64Blob = blob.getContent();
+							final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
+							InputStream stream = new ByteArrayInputStream(strBlob);
+							captcha = BitmapFactory.decodeStream(stream);
+						} catch (Exception e) {
+							//ignored
 						}
-					});
+					} else {
+						try {
+							Field url = data.getFieldByName("url");
+							String urlString = url.findChildContent("value");
+							URL uri = new URL(urlString);
+							captcha = BitmapFactory.decodeStream(uri.openConnection().getInputStream());
+						} catch (IOException e) {
+							Logging.e(Config.LOGTAG, e.toString());
+						}
+					}
+
+					if (captcha != null) {
+						failed = !mXmppConnectionService.displayCaptchaRequest(account, id, data, captcha);
+					}
 				} else {
-					changeStatus(Account.State.REGISTRATION_FAILED);
-					disconnect(true);
-					Logging.d(Config.LOGTAG, account.getJid().toBareJid()
-							+ ": could not register. instructions are"
-							+ (instructions != null ? instructions.getContent() : ""));
+					failed = true;
+				}
+
+				if (failed) {
+					final Element instructions = packet.query().findChild("instructions");
+					setAccountCreationFailed((instructions != null) ? instructions.getContent() : "");
 				}
 			}
 		});
 	}
 
+	private void setAccountCreationFailed(String instructions) {
+		changeStatus(Account.State.REGISTRATION_FAILED);
+		disconnect(true);
+		Log.d(Config.LOGTAG, account.getJid().toBareJid()
+				+ ": could not register. instructions are"
+				+ instructions);
+	}
+
+	public void resetEverything() {
+		resetStreamId();
+		clearIqCallbacks();
+		mStanzaQueue.clear();
+		synchronized (this.disco) {
+			disco.clear();
+		}
+	}
+
 	private void sendBindRequest() {
-		while(!mXmppConnectionService.areMessagesInitialized()) {
+		while(!mXmppConnectionService.areMessagesInitialized() && socket != null && !socket.isClosed()) {
 			try {
 				Thread.sleep(500);
 			} catch (final InterruptedException ignored) {
 			}
 		}
+		needsBinding = false;
+		clearIqCallbacks();
 		final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
 		iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
 				.addChild("resource").setContent(account.getResource());
 		this.sendUnmodifiedIqPacket(iq, new OnIqPacketReceived() {
 			@Override
 			public void onIqPacketReceived(final Account account, final IqPacket packet) {
+				if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
+					return;
+				}
 				final Element bind = packet.findChild("bind");
-				if (bind != null) {
+				if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
 					final Element jid = bind.findChild("jid");
 					if (jid != null && jid.getContent() != null) {
 						try {
@@ -685,24 +886,71 @@ public class XmppConnection implements Runnable {
 							sendPostBindInitialization();
 						}
 					} else {
+						Logging.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure");
 						disconnect(true);
 					}
 				} else {
+					Logging.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure");
 					disconnect(true);
 				}
 			}
 		});
 	}
 
+	private void clearIqCallbacks() {
+		final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
+		final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
+		synchronized (this.packetCallbacks) {
+			if (this.packetCallbacks.size() == 0) {
+				return;
+			}
+			Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": clearing "+this.packetCallbacks.size()+" iq callbacks");
+			final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator = this.packetCallbacks.values().iterator();
+			while (iterator.hasNext()) {
+				Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
+				callbacks.add(entry.second);
+				iterator.remove();
+			}
+		}
+		for(OnIqPacketReceived callback : callbacks) {
+			callback.onIqPacketReceived(account,failurePacket);
+		}
+		Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": done clearing iq callbacks. " + this.packetCallbacks.size() + " left");
+	}
+
+	public void sendDiscoTimeout() {
+		final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.ERROR); //don't use timeout
+		final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
+		synchronized (this.mPendingServiceDiscoveriesIds) {
+			for(String id : mPendingServiceDiscoveriesIds) {
+				synchronized (this.packetCallbacks) {
+					Pair<IqPacket, OnIqPacketReceived> pair = this.packetCallbacks.remove(id);
+					if (pair != null) {
+						callbacks.add(pair.second);
+					}
+				}
+			}
+			this.mPendingServiceDiscoveriesIds.clear();
+		}
+		if (callbacks.size() > 0) {
+			Log.d(Config.LOGTAG,account.getJid().toBareJid()+": sending disco timeout");
+			resetStreamId(); //we don't want to live with this for ever
+		}
+		for(OnIqPacketReceived callback : callbacks) {
+			callback.onIqPacketReceived(account,failurePacket);
+		}
+	}
+
 	private void sendStartSession() {
 		final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
-		startSession.addChild("session","urn:ietf:params:xml:ns:xmpp-session");
+		startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
 		this.sendUnmodifiedIqPacket(startSession, new OnIqPacketReceived() {
 			@Override
 			public void onIqPacketReceived(Account account, IqPacket packet) {
 				if (packet.getType() == IqPacket.TYPE.RESULT) {
 					sendPostBindInitialization();
-				} else {
+				} else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
+					Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not init sessions");
 					disconnect(true);
 				}
 			}
@@ -720,56 +968,96 @@ public class XmppConnection implements Runnable {
 			final EnablePacket enable = new EnablePacket(smVersion);
 			tagWriter.writeStanzaAsync(enable);
 			stanzasSent = 0;
-			messageReceipts.clear();
+			mStanzaQueue.clear();
 		}
 		features.carbonsEnabled = false;
 		features.blockListRequested = false;
-		disco.clear();
-		sendServiceDiscoveryInfo(account.getServer());
-		sendServiceDiscoveryInfo(account.getJid().toBareJid());
+		synchronized (this.disco) {
+			this.disco.clear();
+		}
+		mPendingServiceDiscoveries = mServerIdentity == Identity.NIMBUZZ ? 1 : 0;
+		lastDiscoStarted = SystemClock.elapsedRealtime();
+		Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": starting service discovery");
+		mXmppConnectionService.scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
 		sendServiceDiscoveryItems(account.getServer());
-		if (bindListener != null) {
-			bindListener.onBind(account);
+		Element caps = streamFeatures.findChild("c");
+		final String hash = caps == null ? null : caps.getAttribute("hash");
+		final String ver = caps == null ? null : caps.getAttribute("ver");
+		ServiceDiscoveryResult discoveryResult = null;
+		if (hash != null && ver != null) {
+			discoveryResult = mXmppConnectionService.databaseBackend.findDiscoveryResult(hash, ver);
 		}
-		sendInitialPing();
+		if (discoveryResult == null) {
+			sendServiceDiscoveryInfo(account.getServer());
+		} else {
+			Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server caps came from cache");
+			disco.put(account.getServer(), discoveryResult);
+		}
+		sendServiceDiscoveryInfo(account.getJid().toBareJid());
+		this.lastSessionStarted = SystemClock.elapsedRealtime();
 	}
 
 	private void sendServiceDiscoveryInfo(final Jid jid) {
-		if (disco.containsKey(jid)) {
-			if (account.getServer().equals(jid)) {
-				enableAdvancedStreamFeatures();
-			}
-		} else {
-			final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
-			iq.setTo(jid);
-			iq.query("http://jabber.org/protocol/disco#info");
-			this.sendIqPacket(iq, new OnIqPacketReceived() {
+		if (mServerIdentity != Identity.NIMBUZZ) {
+			mPendingServiceDiscoveries++;
+		}
+		final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
+		iq.setTo(jid);
+		iq.query("http://jabber.org/protocol/disco#info");
+		String id = this.sendIqPacket(iq, new OnIqPacketReceived() {
 
-				@Override
-				public void onIqPacketReceived(final Account account, final IqPacket packet) {
-					final List<Element> elements = packet.query().getChildren();
-					final Info info = new Info();
-					for (final Element element : elements) {
-						if (element.getName().equals("identity")) {
-							String type = element.getAttribute("type");
-							String category = element.getAttribute("category");
-							if (type != null && category != null) {
-								info.identities.add(new Pair<>(category,type));
-							}
-						} else if (element.getName().equals("feature")) {
-							info.features.add(element.getAttribute("var"));
+			@Override
+			public void onIqPacketReceived(final Account account, final IqPacket packet) {
+				if (packet.getType() == IqPacket.TYPE.RESULT) {
+					boolean advancedStreamFeaturesLoaded;
+					synchronized (XmppConnection.this.disco) {
+						ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
+						for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
+							if (mServerIdentity == Identity.UNKNOWN && id.getType().equals("im") &&
+							    id.getCategory().equals("server") && id.getName() != null &&
+							    jid.equals(account.getServer())) {
+									switch (id.getName()) {
+										case "Prosody":
+											mServerIdentity = Identity.PROSODY;
+											break;
+										case "ejabberd":
+											mServerIdentity = Identity.EJABBERD;
+											break;
+										case "Slack-XMPP":
+											mServerIdentity = Identity.SLACK;
+											break;
+									}
+									Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": server name: " + id.getName());
+								}
+						}
+						if (jid.equals(account.getServer())) {
+							mXmppConnectionService.databaseBackend.insertDiscoveryResult(result);
 						}
+						disco.put(jid, result);
+						advancedStreamFeaturesLoaded = disco.containsKey(account.getServer())
+								&& disco.containsKey(account.getJid().toBareJid());
 					}
-					disco.put(jid, info);
-
-					if (account.getServer().equals(jid)) {
+					if (advancedStreamFeaturesLoaded && (jid.equals(account.getServer()) || jid.equals(account.getJid().toBareJid()))) {
 						enableAdvancedStreamFeatures();
-						for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
-							listener.onAdvancedStreamFeaturesAvailable(account);
+					}
+				} else {
+					Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not query disco info for " + jid.toString());
+				}
+				if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
+					mPendingServiceDiscoveries--;
+					if (mPendingServiceDiscoveries == 0) {
+						Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": done with service discovery");
+						Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": online with resource " + account.getResource());
+						if (bindListener != null) {
+							bindListener.onBind(account);
 						}
+						changeStatus(Account.State.ONLINE);
 					}
 				}
-			});
+			}
+		});
+		synchronized (this.mPendingServiceDiscoveriesIds) {
+			this.mPendingServiceDiscoveriesIds.add(id);
 		}
 	}
 
@@ -778,9 +1066,12 @@ public class XmppConnection implements Runnable {
 			sendEnableCarbons();
 		}
 		if (getFeatures().blocking() && !features.blockListRequested) {
-			Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": Requesting block list");
+			Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": Requesting block list");
 			this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
 		}
+		for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
+			listener.onAdvancedStreamFeaturesAvailable(account);
+		}
 	}
 
 	private void sendServiceDiscoveryItems(final Jid server) {
@@ -791,14 +1082,18 @@ public class XmppConnection implements Runnable {
 
 			@Override
 			public void onIqPacketReceived(final Account account, final IqPacket packet) {
-				final List<Element> elements = packet.query().getChildren();
-				for (final Element element : elements) {
-					if (element.getName().equals("item")) {
-						final Jid jid = element.getAttributeAsJid("jid");
-						if (jid != null && !jid.equals(account.getServer())) {
-							sendServiceDiscoveryInfo(jid);
+				if (packet.getType() == IqPacket.TYPE.RESULT) {
+					final List<Element> elements = packet.query().getChildren();
+					for (final Element element : elements) {
+						if (element.getName().equals("item")) {
+							final Jid jid = element.getAttributeAsJid("jid");
+							if (jid != null && !jid.equals(account.getServer())) {
+								sendServiceDiscoveryInfo(jid);
+							}
 						}
 					}
+				} else {
+					Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not query disco items of " + server);
 				}
 			}
 		});
@@ -832,12 +1127,13 @@ public class XmppConnection implements Runnable {
 			Logging.d(Config.LOGTAG,
 					account.getJid().toBareJid() + ": switching resource due to conflict ("
 					+ account.getResource() + ")");
+		} else if (streamError != null) {
+			Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": stream error "+streamError.toString());
 		}
 	}
 
 	private void sendStartStream() throws IOException {
 		final Tag stream = Tag.start("stream:stream");
-		stream.setAttribute("from", account.getJid().toBareJid().toString());
 		stream.setAttribute("to", account.getServer().toString());
 		stream.setAttribute("version", "1.0");
 		stream.setAttribute("xml:lang", "en");
@@ -850,24 +1146,23 @@ public class XmppConnection implements Runnable {
 		return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
 	}
 
-	public void sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
+	public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
 		packet.setFrom(account.getJid());
-		this.sendUnmodifiedIqPacket(packet,callback);
-
+		return this.sendUnmodifiedIqPacket(packet, callback);
 	}
 
-	private synchronized void sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
+	private synchronized String sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
 		if (packet.getId() == null) {
 			final String id = nextRandomId();
 			packet.setAttribute("id", id);
 		}
 		if (callback != null) {
-			if (packet.getId() == null) {
-				packet.setId(nextRandomId());
+			synchronized (this.packetCallbacks) {
+				packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
 			}
-			packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
 		}
 		this.sendPacket(packet);
+		return packet.getId();
 	}
 
 	public void sendMessagePacket(final MessagePacket packet) {
@@ -884,24 +1179,22 @@ public class XmppConnection implements Runnable {
 			disconnect(true);
 			return;
 		}
-		final String name = packet.getName();
-		if (name.equals("iq") || name.equals("message") || name.equals("presence")) {
-			++stanzasSent;
-		}
 		tagWriter.writeStanzaAsync(packet);
-		if (packet instanceof MessagePacket && packet.getId() != null && getFeatures().sm()) {
-			if (Config.EXTENDED_SM_LOGGING) {
-				Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": requesting ack for message stanza #" + stanzasSent);
+		if (packet instanceof AbstractAcknowledgeableStanza) {
+			AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
+			++stanzasSent;
+			this.mStanzaQueue.put(stanzasSent, stanza);
+			if (stanza instanceof MessagePacket && stanza.getId() != null && getFeatures().sm()) {
+				if (Config.EXTENDED_SM_LOGGING) {
+					Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": requesting ack for message stanza #" + stanzasSent);
+				}
+				tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
 			}
-			this.messageReceipts.put(stanzasSent, packet.getId());
-			tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
 		}
 	}
 
 	public void sendPing() {
-		if (streamFeatures.hasChild("sm")) {
-			tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
-		} else {
+		if (!r()) {
 			final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
 			iq.setFrom(account.getJid());
 			iq.addChild("ping", "urn:xmpp:ping");
@@ -948,37 +1241,71 @@ public class XmppConnection implements Runnable {
 		}
 	}
 
-	public void disconnect(final boolean force) {
-		Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": disconnecting");
-		try {
-			if (force) {
-				socket.close();
-				return;
-			}
+	public void waitForPush() {
+		if (tagWriter.isActive()) {
+			tagWriter.finish();
 			new Thread(new Runnable() {
-
 				@Override
 				public void run() {
-					if (tagWriter.isActive()) {
-						tagWriter.finish();
-						try {
-							while (!tagWriter.finished()) {
-								Logging.d(Config.LOGTAG, "not yet finished");
-								Thread.sleep(100);
-							}
-							tagWriter.writeTag(Tag.end("stream:stream"));
-							socket.close();
-						} catch (final IOException e) {
-							Logging.d(Config.LOGTAG,
-									"io exception during disconnect");
-						} catch (final InterruptedException e) {
-							Logging.d(Config.LOGTAG, "interrupted");
+					try {
+						while(!tagWriter.finished()) {
+							Thread.sleep(10);
 						}
+						socket.close();
+						Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": closed tcp without closing stream");
+					} catch (IOException e) {
+						e.printStackTrace();
+					} catch (InterruptedException e) {
+						e.printStackTrace();
 					}
 				}
 			}).start();
-		} catch (final IOException e) {
-			Logging.d(Config.LOGTAG, "io exception during disconnect");
+		} else {
+			forceCloseSocket();
+			Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": closed tcp without closing stream (no waiting)");
+		}
+	}
+
+	private void forceCloseSocket() {
+		if (socket != null) {
+			try {
+				socket.close();
+			} catch (IOException e) {
+				Logging.d(Config.LOGTAG,account.getJid().toBareJid().toString()+": exception during force close ("+e.getMessage()+")");
+			}
+		}
+	}
+
+	public void disconnect(final boolean force) {
+		Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": disconnecting force="+Boolean.valueOf(force));
+		if (force) {
+			forceCloseSocket();
+			return;
+		} else {
+			if (tagWriter.isActive()) {
+				tagWriter.finish();
+				try {
+					int i = 0;
+					boolean warned = false;
+					while (!tagWriter.finished() && socket.isConnected() && i <= 10) {
+						if (!warned) {
+							Log.d(Config.LOGTAG, account.getJid().toBareJid()+": waiting for tag writer to finish");
+							warned = true;
+						}
+						Thread.sleep(200);
+						i++;
+					}
+					if (warned) {
+						Log.d(Config.LOGTAG,account.getJid().toBareJid()+": tag writer has finished");
+					}
+					Log.d(Config.LOGTAG,account.getJid().toBareJid()+": closing stream");
+					tagWriter.writeTag(Tag.end("stream:stream"));
+				} catch (final IOException e) {
+					Log.d(Config.LOGTAG,account.getJid().toBareJid()+": io exception during disconnect ("+e.getMessage()+")");
+				} catch (final InterruptedException e) {
+					Log.d(Config.LOGTAG, "interrupted");
+				}
+			}
 		}
 	}
 
@@ -987,13 +1314,15 @@ public class XmppConnection implements Runnable {
 	}
 
 	public List<Jid> findDiscoItemsByFeature(final String feature) {
-		final List<Jid> items = new ArrayList<>();
-		for (final Entry<Jid, Info> cursor : disco.entrySet()) {
-			if (cursor.getValue().features.contains(feature)) {
-				items.add(cursor.getKey());
+		synchronized (this.disco) {
+			final List<Jid> items = new ArrayList<>();
+			for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
+				if (cursor.getValue().getFeatures().contains(feature)) {
+					items.add(cursor.getKey());
+				}
 			}
+			return items;
 		}
-		return items;
 	}
 
 	public Jid findDiscoItemByFeature(final String feature) {
@@ -1004,17 +1333,24 @@ public class XmppConnection implements Runnable {
 		return null;
 	}
 
-	public void r() {
-		this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
+	public boolean r() {
+		if (getFeatures().sm()) {
+			this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
+			return true;
+		} else {
+			return false;
+		}
 	}
 
 	public String getMucServer() {
-		for (final Entry<Jid, Info> cursor : disco.entrySet()) {
-			final Info value = cursor.getValue();
-			if (value.features.contains("http://jabber.org/protocol/muc")
-					&& !value.features.contains("jabber:iq:gateway")
-					&& !value.identities.contains(new Pair<>("conference","irc"))) {
-				return cursor.getKey().toString();
+		synchronized (this.disco) {
+			for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
+				final ServiceDiscoveryResult value = cursor.getValue();
+				if (value.getFeatures().contains("http://jabber.org/protocol/muc")
+						&& !value.getFeatures().contains("jabber:iq:gateway")
+						&& !value.hasIdentity("conference", "irc")) {
+					return cursor.getKey().toString();
+				}
 			}
 		}
 		return null;
@@ -1052,6 +1388,9 @@ public class XmppConnection implements Runnable {
 		return this.lastPingSent;
 	}
 
+	public long getLastDiscoStarted() {
+		return this.lastDiscoStarted;
+	}
 	public long getLastPacketReceived() {
 		return this.lastPacketReceived;
 	}
@@ -1069,9 +1408,12 @@ public class XmppConnection implements Runnable {
 		this.lastConnect = 0;
 	}
 
-	private class Info {
-		public final ArrayList<String> features = new ArrayList<>();
-		public final ArrayList<Pair<String,String>> identities = new ArrayList<>();
+	public void setInteractive(boolean interactive) {
+		this.mInteractive = interactive;
+	}
+
+	public Identity getServerIdentity() {
+		return mServerIdentity;
 	}
 
 	private class UnauthorizedException extends IOException {
@@ -1086,6 +1428,15 @@ public class XmppConnection implements Runnable {
 
 	}
 
+	public enum Identity {
+		FACEBOOK,
+		SLACK,
+		EJABBERD,
+		PROSODY,
+		NIMBUZZ,
+		UNKNOWN
+	}
+
 	public class Features {
 		XmppConnection connection;
 		private boolean carbonsEnabled = false;
@@ -1097,8 +1448,10 @@ public class XmppConnection implements Runnable {
 		}
 
 		private boolean hasDiscoFeature(final Jid server, final String feature) {
-			return connection.disco.containsKey(server) &&
-				connection.disco.get(server).features.contains(feature);
+			synchronized (XmppConnection.this.disco) {
+				return connection.disco.containsKey(server) &&
+						connection.disco.get(server).getFeatures().contains(feature);
+			}
 		}
 
 		public boolean carbons() {
@@ -1123,26 +1476,26 @@ public class XmppConnection implements Runnable {
 		}
 
 		public boolean pep() {
-			final Pair<String,String> needle = new Pair<>("pubsub","pep");
-			Info info = disco.get(account.getServer());
-			if (info != null && info.identities.contains(needle)) {
-				return true;
-			} else {
-				info = disco.get(account.getJid().toBareJid());
-				return info != null && info.identities.contains(needle);
+			synchronized (XmppConnection.this.disco) {
+				final Pair<String, String> needle = new Pair<>("pubsub", "pep");
+				ServiceDiscoveryResult info = disco.get(account.getServer());
+				if (info != null && info.hasIdentity("pubsub", "pep")) {
+					return true;
+				} else {
+					info = disco.get(account.getJid().toBareJid());
+					return info != null && info.hasIdentity("pubsub", "pep");
+				}
 			}
 		}
 
 		public boolean mam() {
-			if (hasDiscoFeature(account.getJid().toBareJid(), "urn:xmpp:mam:0")) {
-				return true;
-			} else {
-				return hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
-			}
+			return hasDiscoFeature(account.getJid().toBareJid(), "urn:xmpp:mam:0")
+				|| hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
 		}
 
-		public boolean advancedStreamFeaturesLoaded() {
-			return disco.containsKey(account.getServer());
+		public boolean push() {
+			return hasDiscoFeature(account.getJid().toBareJid(), "urn:xmpp:push:0")
+					|| hasDiscoFeature(account.getServer(), "urn:xmpp:push:0");
 		}
 
 		public boolean rosterVersioning() {
@@ -1154,7 +1507,7 @@ public class XmppConnection implements Runnable {
 		}
 
 		public boolean httpUpload() {
-			return findDiscoItemsByFeature(Xmlns.HTTP_UPLOAD).size() > 0;
+			return !Config.DISABLE_HTTP_UPLOAD && findDiscoItemsByFeature(Xmlns.HTTP_UPLOAD).size() > 0;
 		}
 	}
 
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/avatar/AvatarPacketGenerator.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/avatar/AvatarPacketGenerator.java
index bb7e557e..1574604e 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/avatar/AvatarPacketGenerator.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/avatar/AvatarPacketGenerator.java
@@ -1,9 +1,9 @@
 package de.thedevstack.conversationsplus.xmpp.avatar;
 
+import de.thedevstack.conversationsplus.xmpp.pubsub.PubSubPacketGenerator;
 import de.thedevstack.conversationsplus.xml.Element;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 import de.thedevstack.conversationsplus.xmpp.pep.Avatar;
-import de.thedevstack.conversationsplus.xmpp.pubsub.PubSubPacketGenerator;
 import de.thedevstack.conversationsplus.xmpp.stanzas.IqPacket;
 
 /**
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/avatar/AvatarPacketParser.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/avatar/AvatarPacketParser.java
index 26d5202f..0867524b 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/avatar/AvatarPacketParser.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/avatar/AvatarPacketParser.java
@@ -1,7 +1,7 @@
 package de.thedevstack.conversationsplus.xmpp.avatar;
 
-import de.thedevstack.conversationsplus.xml.Element;
 import de.thedevstack.conversationsplus.xmpp.pubsub.PubSubPacketParser;
+import de.thedevstack.conversationsplus.xml.Element;
 import de.thedevstack.conversationsplus.xmpp.stanzas.IqPacket;
 
 /**
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/chatstate/ChatState.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/chatstate/ChatState.java
index 929d485a..323d99c2 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/chatstate/ChatState.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/chatstate/ChatState.java
@@ -4,7 +4,7 @@ import de.thedevstack.conversationsplus.xml.Element;
 
 public enum ChatState {
 
-	ACTIVE, INACTIVE, GONE, COMPOSING, PAUSED, mIncomingChatState;
+	ACTIVE, INACTIVE, GONE, COMPOSING, PAUSED;
 
 	public static ChatState parse(Element element) {
 		final String NAMESPACE = "http://jabber.org/protocol/chatstates";
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/forms/Data.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/forms/Data.java
index 591d8ada..cb612a07 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/forms/Data.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/forms/Data.java
@@ -53,16 +53,16 @@ public class Data extends Element {
 
 	public void submit() {
 		this.setAttribute("type","submit");
-		removeNonFieldChildren();
+		removeUnnecessaryChildren();
 		for(Field field : getFields()) {
 			field.removeNonValueChildren();
 		}
 	}
 
-	private void removeNonFieldChildren() {
+	private void removeUnnecessaryChildren() {
 		for(Iterator<Element> iterator = this.children.iterator(); iterator.hasNext();) {
 			Element element = iterator.next();
-			if (!element.getName().equals("field")) {
+			if (!element.getName().equals("field") && !element.getName().equals("title")) {
 				iterator.remove();
 			}
 		}
@@ -76,10 +76,20 @@ public class Data extends Element {
 	}
 
 	public void setFormType(String formType) {
-		this.put("FORM_TYPE",formType);
+		this.put("FORM_TYPE", formType);
 	}
 
 	public String getFormType() {
-		return this.getAttribute("FORM_TYPE");
+		String type = getValue("FORM_TYPE");
+		return type == null ? "" : type;
+	}
+
+	public String getValue(String name) {
+		Field field = this.getFieldByName(name);
+		return field == null ? null : field.getValue();
+	}
+
+	public String getTitle() {
+		return findChildContent("title");
 	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/forms/Field.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/forms/Field.java
index 9eb2d08d..88b3155c 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/forms/Field.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/forms/Field.java
@@ -1,7 +1,9 @@
 package de.thedevstack.conversationsplus.xmpp.forms;
 
+import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Iterator;
+import java.util.List;
 
 import de.thedevstack.conversationsplus.xml.Element;
 
@@ -16,7 +18,7 @@ public class Field extends Element {
 		super("field");
 	}
 
-	public String getName() {
+	public String getFieldName() {
 		return this.getAttribute("var");
 	}
 
@@ -47,4 +49,33 @@ public class Field extends Element {
 		field.setChildren(element.getChildren());
 		return field;
 	}
+
+	public String getValue() {
+		return findChildContent("value");
+	}
+
+	public List<String> getValues() {
+		List<String> values = new ArrayList<>();
+		for(Element child : getChildren()) {
+			if ("value".equals(child.getName())) {
+				String content = child.getContent();
+				if (content != null) {
+					values.add(content);
+				}
+			}
+		}
+		return values;
+	}
+
+	public String getLabel() {
+		return getAttribute("label");
+	}
+
+	public String getType() {
+		return getAttribute("type");
+	}
+
+	public boolean isRequired() {
+		return hasChild("required");
+	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jid/Jid.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jid/Jid.java
index 5aaf1563..bb32e821 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/jid/Jid.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jid/Jid.java
@@ -176,7 +176,7 @@ public final class Jid {
 			return resourcepart.isEmpty() ? this : fromParts(localpart, domainpart, "");
 		} catch (final InvalidJidException e) {
 			// This should never happen.
-			return null;
+			throw new AssertionError("Jid " + this.toString() + " invalid");
 		}
 	}
 
@@ -185,7 +185,7 @@ public final class Jid {
 			return resourcepart.isEmpty() && localpart.isEmpty() ? this : fromString(getDomainpart());
 		} catch (final InvalidJidException e) {
 			// This should never happen.
-			return null;
+			throw new AssertionError("Jid " + this.toString() + " invalid");
 		}
 	}
 
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnection.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnection.java
index 7885cc0f..c4ceeb4e 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnection.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnection.java
@@ -1,5 +1,12 @@
 package de.thedevstack.conversationsplus.xmpp.jingle;
 
+import android.content.Intent;
+import android.net.Uri;
+import android.util.Pair;
+
+import java.io.FileNotFoundException;
+import java.io.InputStream;
+import java.io.OutputStream;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Iterator;
@@ -8,22 +15,23 @@ import java.util.Locale;
 import java.util.Map.Entry;
 import java.util.concurrent.ConcurrentHashMap;
 
-import android.content.Intent;
-import android.net.Uri;
-import android.os.SystemClock;
-
 import de.thedevstack.android.logcat.Logging;
-import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.ConversationsPlusPreferences;
+import de.thedevstack.conversationsplus.utils.MessageUtil;
+import de.thedevstack.conversationsplus.utils.StreamUtil;
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.crypto.axolotl.AxolotlService;
+import de.thedevstack.conversationsplus.crypto.axolotl.OnMessageCreatedCallback;
+import de.thedevstack.conversationsplus.crypto.axolotl.XmppAxolotlMessage;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Conversation;
-import de.thedevstack.conversationsplus.entities.Transferable;
 import de.thedevstack.conversationsplus.entities.DownloadableFile;
-import de.thedevstack.conversationsplus.entities.TransferablePlaceholder;
 import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.entities.Transferable;
+import de.thedevstack.conversationsplus.entities.TransferablePlaceholder;
 import de.thedevstack.conversationsplus.persistance.FileBackend;
+import de.thedevstack.conversationsplus.services.AbstractConnectionManager;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
-import de.thedevstack.conversationsplus.utils.MessageUtil;
 import de.thedevstack.conversationsplus.xml.Element;
 import de.thedevstack.conversationsplus.xmpp.OnIqPacketReceived;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
@@ -63,20 +71,24 @@ public class JingleConnection implements Transferable {
 	private String contentCreator;
 
 	private int mProgress = 0;
-	private long mLastGuiRefresh = 0;
 
 	private boolean receivedCandidate = false;
 	private boolean sentCandidate = false;
 
 	private boolean acceptedAutomatically = false;
 
+	private XmppAxolotlMessage mXmppAxolotlMessage;
+
 	private JingleTransport transport = null;
 
+	private OutputStream mFileOutputStream;
+	private InputStream mFileInputStream;
+
 	private OnIqPacketReceived responseListener = new OnIqPacketReceived() {
 
 		@Override
 		public void onIqPacketReceived(Account account, IqPacket packet) {
-			if (packet.getType() == IqPacket.TYPE.ERROR) {
+			if (packet.getType() != IqPacket.TYPE.RESULT) {
 				fail();
 			}
 		}
@@ -88,15 +100,13 @@ public class JingleConnection implements Transferable {
 		public void onFileTransmitted(DownloadableFile file) {
 			if (responder.equals(account.getJid())) {
 				sendSuccess();
+				MessageUtil.updateFileParams(message);
+				mXmppConnectionService.databaseBackend.createMessage(message);
+				mXmppConnectionService.markMessage(message,Message.STATUS_RECEIVED);
 				if (acceptedAutomatically) {
 					message.markUnread();
-					JingleConnection.this.mXmppConnectionService
-							.getNotificationService().push(message);
+					JingleConnection.this.mXmppConnectionService.getNotificationService().push(message);
 				}
-				MessageUtil.updateFileParams(message);
-				mXmppConnectionService.databaseBackend.createMessage(message);
-				mXmppConnectionService.markMessage(message,
-						Message.STATUS_RECEIVED);
 			} else {
 				if (message.getEncryption() == Message.ENCRYPTION_PGP || message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 					file.delete();
@@ -107,6 +117,8 @@ public class JingleConnection implements Transferable {
 				Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
 				intent.setData(Uri.fromFile(file));
 				mXmppConnectionService.sendBroadcast(intent);
+			} else {
+				account.getPgpDecryptionService().add(message);
 			}
 		}
 
@@ -117,6 +129,14 @@ public class JingleConnection implements Transferable {
 		}
 	};
 
+	public InputStream getFileInputStream() {
+		return this.mFileInputStream;
+	}
+
+	public OutputStream getFileOutputStream() {
+		return this.mFileOutputStream;
+	}
+
 	private OnProxyActivated onProxyActivated = new OnProxyActivated() {
 
 		@Override
@@ -198,7 +218,26 @@ public class JingleConnection implements Transferable {
 		mXmppConnectionService.sendIqPacket(account,response,null);
 	}
 
-	public void init(Message message) {
+	public void init(final Message message) {
+		if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
+			Conversation conversation = message.getConversation();
+			conversation.getAccount().getAxolotlService().prepareKeyTransportMessage(conversation.getContact(), new OnMessageCreatedCallback() {
+				@Override
+				public void run(XmppAxolotlMessage xmppAxolotlMessage) {
+					if (xmppAxolotlMessage != null) {
+						init(message, xmppAxolotlMessage);
+					} else {
+						fail();
+					}
+				}
+			});
+		} else {
+			init(message, null);
+		}
+	}
+
+	private void init(Message message, XmppAxolotlMessage xmppAxolotlMessage) {
+		this.mXmppAxolotlMessage = xmppAxolotlMessage;
 		this.contentCreator = "initiator";
 		this.contentName = this.mJingleConnectionManager.nextRandomId();
 		this.message = message;
@@ -271,13 +310,16 @@ public class JingleConnection implements Transferable {
 		this.contentCreator = content.getAttribute("creator");
 		this.contentName = content.getAttribute("name");
 		this.transportId = content.getTransportId();
-		this.mergeCandidates(JingleCandidate.parse(content.socks5transport()
-				.getChildren()));
+		this.mergeCandidates(JingleCandidate.parse(content.socks5transport().getChildren()));
 		this.fileOffer = packet.getJingleContent().getFileOffer();
 
 		mXmppConnectionService.sendIqPacket(account,packet.generateResponse(IqPacket.TYPE.RESULT),null);
 
 		if (fileOffer != null) {
+			Element encrypted = fileOffer.findChild("encrypted", AxolotlService.PEP_PREFIX);
+			if (encrypted != null) {
+				this.mXmppAxolotlMessage = XmppAxolotlMessage.fromElement(encrypted, packet.getFrom().toBareJid());
+			}
 			Element fileSize = fileOffer.findChild("size");
 			Element fileNameElement = fileOffer.findChild("name");
 			if (fileNameElement != null) {
@@ -323,10 +365,9 @@ public class JingleConnection implements Transferable {
 				message.setBody(Long.toString(size));
 				conversation.add(message);
 				mXmppConnectionService.updateConversationUi();
-				if (size <= ConversationsPlusPreferences.autoAcceptFileSize()
-                        && mXmppConnectionService.isDownloadAllowedInConnection()) {
-					Logging.d(Config.LOGTAG, "auto accepting file from "
-							+ packet.getFrom());
+				if (mJingleConnectionManager.hasStoragePermission()
+						&& size < ConversationsPlusPreferences.autoAcceptFileSize()) {
+					Logging.d(Config.LOGTAG, "auto accepting file from "+ packet.getFrom());
 					this.acceptedAutomatically = true;
 					this.sendAccept();
 				} else {
@@ -336,21 +377,36 @@ public class JingleConnection implements Transferable {
 									+ size
 									+ " allowed size:"
 									+ ConversationsPlusPreferences.autoAcceptFileSize());
-					this.mXmppConnectionService.getNotificationService()
-							.push(message);
+					this.mXmppConnectionService.getNotificationService().push(message);
 				}
 				this.file = FileBackend.getFile(message, false);
-				if (message.getEncryption() == Message.ENCRYPTION_OTR) {
+				if (mXmppAxolotlMessage != null) {
+					XmppAxolotlMessage.XmppAxolotlKeyTransportMessage transportMessage = account.getAxolotlService().processReceivingKeyTransportMessage(mXmppAxolotlMessage);
+					if (transportMessage != null) {
+						message.setEncryption(Message.ENCRYPTION_AXOLOTL);
+						this.file.setKey(transportMessage.getKey());
+						this.file.setIv(transportMessage.getIv());
+						message.setAxolotlFingerprint(transportMessage.getFingerprint());
+					} else {
+						Logging.d(Config.LOGTAG,"could not process KeyTransportMessage");
+					}
+				} else if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 					byte[] key = conversation.getSymmetricKey();
 					if (key == null) {
 						this.sendCancel();
 						this.fail();
 						return;
 					} else {
-						this.file.setKey(key);
+						this.file.setKeyAndIv(key);
 					}
 				}
-				this.file.setExpectedSize(size);
+				this.mFileOutputStream = AbstractConnectionManager.createOutputStream(this.file,message.getEncryption() == Message.ENCRYPTION_AXOLOTL);
+				if (message.getEncryption() == Message.ENCRYPTION_OTR && Config.REPORT_WRONG_FILESIZE_IN_OTR_JINGLE) {
+					this.file.setExpectedSize((size / 16 + 1) * 16);
+				} else {
+					this.file.setExpectedSize(size);
+				}
+				Logging.d(Config.LOGTAG, "receiving file: expecting size of " + this.file.getExpectedSize());
 			} else {
 				this.sendCancel();
 				this.fail();
@@ -367,17 +423,34 @@ public class JingleConnection implements Transferable {
 		if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
 			content.setTransportId(this.transportId);
 			this.file = FileBackend.getFile(message, false);
-			if (message.getEncryption() == Message.ENCRYPTION_OTR) {
-				Conversation conversation = this.message.getConversation();
-				if (!this.mXmppConnectionService.renewSymmetricKey(conversation)) {
-					Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": could not set symmetric key");
-					cancel();
+			Pair<InputStream,Integer> pair;
+			try {
+				if (message.getEncryption() == Message.ENCRYPTION_OTR) {
+					Conversation conversation = this.message.getConversation();
+					if (!this.mXmppConnectionService.renewSymmetricKey(conversation)) {
+						Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not set symmetric key");
+						cancel();
+					}
+					this.file.setKeyAndIv(conversation.getSymmetricKey());
+					pair = AbstractConnectionManager.createInputStream(this.file, false);
+					this.file.setExpectedSize(pair.second);
+					content.setFileOffer(this.file, true);
+				} else if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
+					this.file.setKey(mXmppAxolotlMessage.getInnerKey());
+					this.file.setIv(mXmppAxolotlMessage.getIV());
+					pair = AbstractConnectionManager.createInputStream(this.file, true);
+					this.file.setExpectedSize(pair.second);
+					content.setFileOffer(this.file, false).addChild(mXmppAxolotlMessage.toElement());
+				} else {
+					pair = AbstractConnectionManager.createInputStream(this.file, false);
+					this.file.setExpectedSize(pair.second);
+					content.setFileOffer(this.file, false);
 				}
-				content.setFileOffer(this.file, true);
-				this.file.setKey(conversation.getSymmetricKey());
-			} else {
-				content.setFileOffer(this.file, false);
+			} catch (FileNotFoundException e) {
+				cancel();
+				return;
 			}
+			this.mFileInputStream = pair.first;
 			this.transportId = this.mJingleConnectionManager.nextRandomId();
 			content.setTransportId(this.transportId);
 			content.socks5transport().setChildren(getCandidatesAsElements());
@@ -386,7 +459,7 @@ public class JingleConnection implements Transferable {
 
 				@Override
 				public void onIqPacketReceived(Account account, IqPacket packet) {
-					if (packet.getType() != IqPacket.TYPE.ERROR) {
+					if (packet.getType() == IqPacket.TYPE.RESULT) {
 						Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": other party received offer");
 						mJingleStatus = JINGLE_STATUS_INITIATED;
 						mXmppConnectionService.markMessage(message, Message.STATUS_OFFERED);
@@ -571,12 +644,11 @@ public class JingleConnection implements Transferable {
 								@Override
 								public void onIqPacketReceived(Account account,
 										IqPacket packet) {
-									if (packet.getType() == IqPacket.TYPE.ERROR) {
+									if (packet.getType() != IqPacket.TYPE.RESULT) {
 										onProxyActivated.failed();
 									} else {
 										onProxyActivated.success();
-										sendProxyActivated(connection
-												.getCandidate().getCid());
+										sendProxyActivated(connection.getCandidate().getCid());
 									}
 								}
 							});
@@ -675,8 +747,7 @@ public class JingleConnection implements Transferable {
 		JinglePacket answer = bootstrapPacket("transport-accept");
 		Content content = new Content("initiator", "a-file-offer");
 		content.setTransportId(this.transportId);
-		content.ibbTransport().setAttribute("block-size",
-				Integer.toString(this.ibbBlockSize));
+		content.ibbTransport().setAttribute("block-size",this.ibbBlockSize);
 		answer.setContent(content);
 		this.sendJinglePacket(answer);
 		return true;
@@ -749,6 +820,8 @@ public class JingleConnection implements Transferable {
 		if (this.transport != null && this.transport instanceof JingleInbandTransport) {
 			this.transport.disconnect();
 		}
+		StreamUtil.close(mFileInputStream);
+		StreamUtil.close(mFileOutputStream);
 		if (this.message != null) {
 			if (this.responder.equals(account.getJid())) {
 				this.message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_FAILED));
@@ -902,10 +975,7 @@ public class JingleConnection implements Transferable {
 
 	public void updateProgress(int i) {
 		this.mProgress = i;
-		if (SystemClock.elapsedRealtime() - this.mLastGuiRefresh > Config.PROGRESS_UI_UPDATE_INTERVAL) {
-			this.mLastGuiRefresh = SystemClock.elapsedRealtime();
-			mXmppConnectionService.updateConversationUi();
-		}
+		mXmppConnectionService.updateConversationUi();
 	}
 
 	interface OnProxyActivated {
@@ -957,4 +1027,8 @@ public class JingleConnection implements Transferable {
 	public int getProgress() {
 		return this.mProgress;
 	}
+
+	public AbstractConnectionManager getConnectionManager() {
+		return this.mJingleConnectionManager;
+	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnectionManager.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnectionManager.java
index 861082d8..3284a936 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnectionManager.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnectionManager.java
@@ -1,23 +1,23 @@
 package de.thedevstack.conversationsplus.xmpp.jingle;
 
+import android.annotation.SuppressLint;
+
 import java.math.BigInteger;
 import java.security.SecureRandom;
 import java.util.HashMap;
 import java.util.List;
 import java.util.concurrent.CopyOnWriteArrayList;
-import android.annotation.SuppressLint;
 
 import de.thedevstack.android.logcat.Logging;
 import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.entities.Account;
-import de.thedevstack.conversationsplus.entities.Transferable;
 import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.entities.Transferable;
 import de.thedevstack.conversationsplus.services.AbstractConnectionManager;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
 import de.thedevstack.conversationsplus.utils.Xmlns;
 import de.thedevstack.conversationsplus.xml.Element;
 import de.thedevstack.conversationsplus.xmpp.OnIqPacketReceived;
-import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 import de.thedevstack.conversationsplus.xmpp.jingle.stanzas.JinglePacket;
 import de.thedevstack.conversationsplus.xmpp.stanzas.IqPacket;
@@ -83,7 +83,7 @@ public class JingleConnectionManager extends AbstractConnectionManager {
 
 	public void getPrimaryCandidate(Account account,
 			final OnPrimaryCandidateFound listener) {
-		if (Config.NO_PROXY_LOOKUP) {
+		if (Config.DISABLE_PROXY_LOOKUP) {
 			listener.onPrimaryCandidateFound(false, null);
 			return;
 		}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleInbandTransport.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleInbandTransport.java
index 84d40b3e..7c830d0b 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleInbandTransport.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleInbandTransport.java
@@ -1,5 +1,7 @@
 package de.thedevstack.conversationsplus.xmpp.jingle;
 
+import android.util.Base64;
+
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
@@ -7,15 +9,12 @@ import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.util.Arrays;
 
-import android.util.Base64;
-
 import de.thedevstack.android.logcat.Logging;
+import de.thedevstack.conversationsplus.utils.StreamUtil;
 import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.DownloadableFile;
-import de.thedevstack.conversationsplus.persistance.FileBackend;
 import de.thedevstack.conversationsplus.utils.CryptoHelper;
-import de.thedevstack.conversationsplus.utils.StreamUtil;
 import de.thedevstack.conversationsplus.xml.Element;
 import de.thedevstack.conversationsplus.xmpp.OnIqPacketReceived;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
@@ -75,7 +74,7 @@ public class JingleInbandTransport extends JingleTransport {
 					@Override
 					public void onIqPacketReceived(Account account,
 							IqPacket packet) {
-						if (packet.getType() == IqPacket.TYPE.ERROR) {
+						if (packet.getType() != IqPacket.TYPE.RESULT) {
 							callback.failed();
 						} else {
 							callback.established();
@@ -94,7 +93,7 @@ public class JingleInbandTransport extends JingleTransport {
 			digest.reset();
 			file.getParentFile().mkdirs();
 			file.createNewFile();
-			this.fileOutputStream = file.createOutputStream();
+			this.fileOutputStream = connection.getFileOutputStream();
 			if (this.fileOutputStream == null) {
 				Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": could not create output stream");
 				callback.onFileTransferAborted();
@@ -113,15 +112,11 @@ public class JingleInbandTransport extends JingleTransport {
 		this.onFileTransmissionStatusChanged = callback;
 		this.file = file;
 		try {
-			if (this.file.getKey() != null) {
-				this.remainingSize = (this.file.getSize() / 16 + 1) * 16;
-			} else {
-				this.remainingSize = this.file.getSize();
-			}
+			this.remainingSize = this.file.getExpectedSize();
 			this.fileSize = this.remainingSize;
 			this.digest = MessageDigest.getInstance("SHA-1");
 			this.digest.reset();
-			fileInputStream = this.file.createInputStream();
+			fileInputStream = connection.getFileInputStream();
 			if (fileInputStream == null) {
 				Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": could no create input stream");
 				callback.onFileTransferAborted();
@@ -181,6 +176,7 @@ public class JingleInbandTransport extends JingleTransport {
 			data.setAttribute("sid", this.sessionId);
 			data.setContent(base64);
 			this.account.getXmppConnection().sendIqPacket(iq, this.onAckReceived);
+			this.account.getXmppConnection().r(); //don't fill up stanza queue too much
 			this.seq++;
 			if (this.remainingSize > 0) {
 				connection.updateProgress((int) ((((double) (this.fileSize - this.remainingSize)) / this.fileSize) * 100));
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleSocks5Transport.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleSocks5Transport.java
index 999180c5..9ea268d5 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleSocks5Transport.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleSocks5Transport.java
@@ -1,5 +1,7 @@
 package de.thedevstack.conversationsplus.xmpp.jingle;
 
+import android.os.PowerManager;
+
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
@@ -10,14 +12,13 @@ import java.net.SocketAddress;
 import java.net.UnknownHostException;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
-import java.util.Arrays;
 
 import de.thedevstack.android.logcat.Logging;
+import de.thedevstack.conversationsplus.utils.StreamUtil;
 import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.entities.DownloadableFile;
-import de.thedevstack.conversationsplus.persistance.FileBackend;
 import de.thedevstack.conversationsplus.utils.CryptoHelper;
-import de.thedevstack.conversationsplus.utils.StreamUtil;
+import de.thedevstack.conversationsplus.utils.SocksSocketFactory;
 
 public class JingleSocks5Transport extends JingleTransport {
 	private JingleCandidate candidate;
@@ -61,31 +62,12 @@ public class JingleSocks5Transport extends JingleTransport {
 					socket = new Socket();
 					SocketAddress address = new InetSocketAddress(candidate.getHost(),candidate.getPort());
 					socket.connect(address,Config.SOCKET_TIMEOUT * 1000);
+
 					inputStream = socket.getInputStream();
 					outputStream = socket.getOutputStream();
-					byte[] login = { 0x05, 0x01, 0x00 };
-					byte[] expectedReply = { 0x05, 0x00 };
-					byte[] reply = new byte[2];
-					outputStream.write(login);
-					inputStream.read(reply);
-					final String connect = Character.toString('\u0005')
-							+ '\u0001' + '\u0000' + '\u0003' + '\u0028'
-							+ destination + '\u0000' + '\u0000';
-					if (Arrays.equals(reply, expectedReply)) {
-						outputStream.write(connect.getBytes());
-						byte[] result = new byte[2];
-						inputStream.read(result);
-						int status = result[1];
-						if (status == 0) {
-							isEstablished = true;
-							callback.established();
-						} else {
-							callback.failed();
-						}
-					} else {
-						socket.close();
-						callback.failed();
-					}
+					SocksSocketFactory.createSocksConnection(socket,destination,0);
+					isEstablished = true;
+					callback.established();
 				} catch (UnknownHostException e) {
 					callback.failed();
 				} catch (IOException e) {
@@ -96,23 +78,24 @@ public class JingleSocks5Transport extends JingleTransport {
 
 	}
 
-	public void send(final DownloadableFile file,
-			final OnFileTransmissionStatusChanged callback) {
+	public void send(final DownloadableFile file, final OnFileTransmissionStatusChanged callback) {
 		new Thread(new Runnable() {
 
 			@Override
 			public void run() {
 				InputStream fileInputStream = null;
+				final PowerManager.WakeLock wakeLock = connection.getConnectionManager().createWakeLock("jingle_send_"+connection.getSessionId());
 				try {
+					wakeLock.acquire();
 					MessageDigest digest = MessageDigest.getInstance("SHA-1");
 					digest.reset();
-					fileInputStream = file.createInputStream();
+					fileInputStream = connection.getFileInputStream();
 					if (fileInputStream == null) {
 						Logging.d(Config.LOGTAG, connection.getAccount().getJid().toBareJid() + ": could not create input stream");
 						callback.onFileTransferAborted();
 						return;
 					}
-					long size = file.getSize();
+					long size = file.getExpectedSize();
 					long transmitted = 0;
 					int count;
 					byte[] buffer = new byte[8192];
@@ -138,6 +121,7 @@ public class JingleSocks5Transport extends JingleTransport {
 					callback.onFileTransferAborted();
 				} finally {
 					StreamUtil.close(fileInputStream);
+					wakeLock.release();
 				}
 			}
 		}).start();
@@ -150,14 +134,16 @@ public class JingleSocks5Transport extends JingleTransport {
 			@Override
 			public void run() {
 				OutputStream fileOutputStream = null;
+				final PowerManager.WakeLock wakeLock = connection.getConnectionManager().createWakeLock("jingle_receive_"+connection.getSessionId());
 				try {
+					wakeLock.acquire();
 					MessageDigest digest = MessageDigest.getInstance("SHA-1");
 					digest.reset();
-					inputStream.skip(45);
+					//inputStream.skip(45);
 					socket.setSoTimeout(30000);
 					file.getParentFile().mkdirs();
 					file.createNewFile();
-					fileOutputStream = file.createOutputStream();
+					fileOutputStream = connection.getFileOutputStream();
 					if (fileOutputStream == null) {
 						callback.onFileTransferAborted();
 						Logging.d(Config.LOGTAG, connection.getAccount().getJid().toBareJid() + ": could not create output stream");
@@ -166,7 +152,7 @@ public class JingleSocks5Transport extends JingleTransport {
 					double size = file.getExpectedSize();
 					long remainingSize = file.getExpectedSize();
 					byte[] buffer = new byte[8192];
-					int count = buffer.length;
+					int count;
 					while (remainingSize > 0) {
 						count = inputStream.read(buffer);
 						if (count == -1) {
@@ -194,7 +180,9 @@ public class JingleSocks5Transport extends JingleTransport {
 					Logging.d(Config.LOGTAG, connection.getAccount().getJid().toBareJid() + ": "+e.getMessage());
 					callback.onFileTransferAborted();
 				} finally {
+					wakeLock.release();
 					StreamUtil.close(fileOutputStream);
+					StreamUtil.close(inputStream);
 				}
 			}
 		}).start();
@@ -209,27 +197,9 @@ public class JingleSocks5Transport extends JingleTransport {
 	}
 
 	public void disconnect() {
-		if (this.outputStream != null) {
-			try {
-				this.outputStream.close();
-			} catch (IOException e) {
-
-			}
-		}
-		if (this.inputStream != null) {
-			try {
-				this.inputStream.close();
-			} catch (IOException e) {
-
-			}
-		}
-		if (this.socket != null) {
-			try {
-				this.socket.close();
-			} catch (IOException e) {
-
-			}
-		}
+		StreamUtil.close(inputStream);
+		StreamUtil.close(outputStream);
+		StreamUtil.close(socket);
 	}
 
 	public boolean isEstablished() {
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnFileTransmissionStatusChanged.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnFileTransmissionStatusChanged.java
index 86daae81..762b4551 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnFileTransmissionStatusChanged.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnFileTransmissionStatusChanged.java
@@ -3,7 +3,7 @@ package de.thedevstack.conversationsplus.xmpp.jingle;
 import de.thedevstack.conversationsplus.entities.DownloadableFile;
 
 public interface OnFileTransmissionStatusChanged {
-	public void onFileTransmitted(DownloadableFile file);
+	void onFileTransmitted(DownloadableFile file);
 
-	public void onFileTransferAborted();
+	void onFileTransferAborted();
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnJinglePacketReceived.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnJinglePacketReceived.java
index d6dda138..c87fd400 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnJinglePacketReceived.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnJinglePacketReceived.java
@@ -5,5 +5,5 @@ import de.thedevstack.conversationsplus.xmpp.PacketReceived;
 import de.thedevstack.conversationsplus.xmpp.jingle.stanzas.JinglePacket;
 
 public interface OnJinglePacketReceived extends PacketReceived {
-	public void onJinglePacketReceived(Account account, JinglePacket packet);
+	void onJinglePacketReceived(Account account, JinglePacket packet);
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnPrimaryCandidateFound.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnPrimaryCandidateFound.java
index be1f1d02..4fe31d3b 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnPrimaryCandidateFound.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnPrimaryCandidateFound.java
@@ -1,6 +1,5 @@
 package de.thedevstack.conversationsplus.xmpp.jingle;
 
 public interface OnPrimaryCandidateFound {
-	public void onPrimaryCandidateFound(boolean success,
-			JingleCandidate canditate);
+	void onPrimaryCandidateFound(boolean success, JingleCandidate canditate);
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/stanzas/Content.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/stanzas/Content.java
index 40eec6f1..336a8c14 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/stanzas/Content.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/stanzas/Content.java
@@ -25,17 +25,18 @@ public class Content extends Element {
 		this.transportId = sid;
 	}
 
-	public void setFileOffer(DownloadableFile actualFile, boolean otr) {
+	public Element setFileOffer(DownloadableFile actualFile, boolean otr) {
 		Element description = this.addChild("description",
 				"urn:xmpp:jingle:apps:file-transfer:3");
 		Element offer = description.addChild("offer");
 		Element file = offer.addChild("file");
-		file.addChild("size").setContent(Long.toString(actualFile.getSize()));
+		file.addChild("size").setContent(Long.toString(actualFile.getExpectedSize()));
 		if (otr) {
 			file.addChild("name").setContent(actualFile.getName() + ".otr");
 		} else {
 			file.addChild("name").setContent(actualFile.getName());
 		}
+		return file;
 	}
 
 	public Element getFileOffer() {
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/pep/Avatar.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/pep/Avatar.java
index 31fda8fd..9c1c8b9c 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/pep/Avatar.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/pep/Avatar.java
@@ -1,10 +1,10 @@
 package de.thedevstack.conversationsplus.xmpp.pep;
 
+import android.util.Base64;
+
 import de.thedevstack.conversationsplus.xml.Element;
 import de.thedevstack.conversationsplus.xmpp.jid.Jid;
 
-import android.util.Base64;
-
 public class Avatar {
 
 	public enum Origin { PEP, VCARD };
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/AbstractAcknowledgeableStanza.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/AbstractAcknowledgeableStanza.java
new file mode 100644
index 00000000..49d9f799
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/AbstractAcknowledgeableStanza.java
@@ -0,0 +1,31 @@
+package de.thedevstack.conversationsplus.xmpp.stanzas;
+
+import de.thedevstack.conversationsplus.xml.Element;
+
+abstract public class AbstractAcknowledgeableStanza extends AbstractStanza {
+
+	protected AbstractAcknowledgeableStanza(String name) {
+		super(name);
+	}
+
+
+	public String getId() {
+		return this.getAttribute("id");
+	}
+
+	public void setId(final String id) {
+		setAttribute("id", id);
+	}
+
+	public Element getError() {
+		Element error = findChild("error");
+		if (error != null) {
+			for(Element element : error.getChildren()) {
+				if (!element.getName().equals("text")) {
+					return element;
+				}
+			}
+		}
+		return null;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/AbstractStanza.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/AbstractStanza.java
index dff5b58d..78c71541 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/AbstractStanza.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/AbstractStanza.java
@@ -18,10 +18,6 @@ public class AbstractStanza extends Element {
 		return getAttributeAsJid("from");
 	}
 
-	public String getId() {
-		return this.getAttribute("id");
-	}
-
 	public void setTo(final Jid to) {
 		if (to != null) {
 			setAttribute("to", to.toString());
@@ -34,10 +30,6 @@ public class AbstractStanza extends Element {
 		}
 	}
 
-	public void setId(final String id) {
-		setAttribute("id", id);
-	}
-
 	public boolean fromServer(final Account account) {
 		return getFrom() == null
 			|| getFrom().equals(account.getServer())
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/IqPacket.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/IqPacket.java
index fb08556b..d86831e0 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/IqPacket.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/IqPacket.java
@@ -2,14 +2,15 @@ package de.thedevstack.conversationsplus.xmpp.stanzas;
 
 import de.thedevstack.conversationsplus.xml.Element;
 
-public class IqPacket extends AbstractStanza {
+public class IqPacket extends AbstractAcknowledgeableStanza {
 
-	public static enum TYPE {
+	public enum TYPE {
 		ERROR,
 		SET,
 		RESULT,
 		GET,
-		INVALID
+		INVALID,
+		TIMEOUT
 	}
 
 	public IqPacket(final TYPE type) {
@@ -39,6 +40,9 @@ public class IqPacket extends AbstractStanza {
 
 	public TYPE getType() {
 		final String type = getAttribute("type");
+		if (type == null) {
+			return TYPE.INVALID;
+		}
 		switch (type) {
 			case "error":
 				return TYPE.ERROR;
@@ -48,6 +52,8 @@ public class IqPacket extends AbstractStanza {
 				return TYPE.SET;
 			case "get":
 				return TYPE.GET;
+			case "timeout":
+				return TYPE.TIMEOUT;
 			default:
 				return TYPE.INVALID;
 		}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/MessagePacket.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/MessagePacket.java
index 638ba5f4..e14cdacd 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/MessagePacket.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/MessagePacket.java
@@ -2,12 +2,10 @@ package de.thedevstack.conversationsplus.xmpp.stanzas;
 
 import android.util.Pair;
 
-import java.text.ParseException;
-
 import de.thedevstack.conversationsplus.parser.AbstractParser;
 import de.thedevstack.conversationsplus.xml.Element;
 
-public class MessagePacket extends AbstractStanza {
+public class MessagePacket extends AbstractAcknowledgeableStanza {
 	public static final int TYPE_CHAT = 0;
 	public static final int TYPE_NORMAL = 2;
 	public static final int TYPE_GROUPCHAT = 3;
@@ -29,6 +27,11 @@ public class MessagePacket extends AbstractStanza {
 		this.children.add(0, body);
 	}
 
+	public void setAxolotlMessage(Element axolotlMessage) {
+		this.children.remove(findChild("body"));
+		this.children.add(0, axolotlMessage);
+	}
+
 	public void setType(int type) {
 		switch (type) {
 		case TYPE_CHAT:
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/PresencePacket.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/PresencePacket.java
index dfe40f87..5fd21b3b 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/PresencePacket.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/PresencePacket.java
@@ -1,6 +1,6 @@
 package de.thedevstack.conversationsplus.xmpp.stanzas;
 
-public class PresencePacket extends AbstractStanza {
+public class PresencePacket extends AbstractAcknowledgeableStanza {
 
 	public PresencePacket() {
 		super("presence");
diff --git a/src/main/java/de/tzur/conversations/Settings.java b/src/main/java/de/tzur/conversations/Settings.java
index 2484a88f..5d64f084 100644
--- a/src/main/java/de/tzur/conversations/Settings.java
+++ b/src/main/java/de/tzur/conversations/Settings.java
@@ -3,7 +3,6 @@ package de.tzur.conversations;
 import android.content.SharedPreferences;
 
 import de.thedevstack.android.logcat.Logging;
-import de.thedevstack.conversationsplus.ConversationsPlusApplication;
 
 /**
  * This class is used to provide access to settings which have to be accessed frequently.