diff --git a/src/org/thoughtcrime/securesms/conversation/ConversationActivity.java b/src/org/thoughtcrime/securesms/conversation/ConversationActivity.java
index 024b9a5bcc..a26b7a2398 100644
--- a/src/org/thoughtcrime/securesms/conversation/ConversationActivity.java
+++ b/src/org/thoughtcrime/securesms/conversation/ConversationActivity.java
@@ -209,7 +209,6 @@ import org.thoughtcrime.securesms.util.Dialogs;
 import org.thoughtcrime.securesms.util.DynamicLanguage;
 import org.thoughtcrime.securesms.util.DynamicNoActionBarTheme;
 import org.thoughtcrime.securesms.util.ExpirationUtil;
-import org.thoughtcrime.securesms.util.GroupUtil;
 import org.thoughtcrime.securesms.util.IdentityUtil;
 import org.thoughtcrime.securesms.util.MediaUtil;
 import org.thoughtcrime.securesms.util.ServiceUtil;
@@ -1171,7 +1170,7 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
       String groupPublicKey;
       boolean isSSKBasedClosedGroup;
       try {
-        groupPublicKey = HexEncodingKt.toHexString(GroupUtil.getDecodedId(groupRecipient.getAddress().toString()));
+        groupPublicKey = HexEncodingKt.toHexString(ClosedGroupsProtocol.doubleDecodeGroupID(groupRecipient.getAddress().toString()));
         isSSKBasedClosedGroup = DatabaseFactory.getSSKDatabase(this).isSSKBasedClosedGroup(groupPublicKey);
       } catch (IOException e) {
         groupPublicKey = null;
diff --git a/src/org/thoughtcrime/securesms/loki/activities/HomeActivity.kt b/src/org/thoughtcrime/securesms/loki/activities/HomeActivity.kt
index 0b03d16933..3cdae8382b 100644
--- a/src/org/thoughtcrime/securesms/loki/activities/HomeActivity.kt
+++ b/src/org/thoughtcrime/securesms/loki/activities/HomeActivity.kt
@@ -335,7 +335,7 @@ class HomeActivity : PassphraseRequiredActionBarActivity, ConversationClickListe
             val isClosedGroup = recipient.address.isClosedGroup
             // Send a leave group message if this is an active closed group
             if (isClosedGroup && DatabaseFactory.getGroupDatabase(this).isActive(recipient.address.toGroupString())) {
-                val groupPublicKey = GroupUtil.getDecodedId(recipient.address.toString()).toHexString()
+                val groupPublicKey = ClosedGroupsProtocol.doubleDecodeGroupID(recipient.address.toString()).toHexString()
                 val isSSKBasedClosedGroup = DatabaseFactory.getSSKDatabase(this).isSSKBasedClosedGroup(groupPublicKey)
                 if (isSSKBasedClosedGroup) {
                     ClosedGroupsProtocol.leave(this, groupPublicKey)
diff --git a/src/org/thoughtcrime/securesms/loki/protocol/ClosedGroupsProtocol.kt b/src/org/thoughtcrime/securesms/loki/protocol/ClosedGroupsProtocol.kt
index d43492b48b..7eb0f694da 100644
--- a/src/org/thoughtcrime/securesms/loki/protocol/ClosedGroupsProtocol.kt
+++ b/src/org/thoughtcrime/securesms/loki/protocol/ClosedGroupsProtocol.kt
@@ -27,10 +27,11 @@ import org.whispersystems.signalservice.loki.protocol.closedgroups.SharedSenderK
 import org.whispersystems.signalservice.loki.utilities.hexEncodedPrivateKey
 import org.whispersystems.signalservice.loki.utilities.hexEncodedPublicKey
 import org.whispersystems.signalservice.loki.utilities.toHexString
+import java.io.IOException
 import java.util.*
 
 object ClosedGroupsProtocol {
-    val isSharedSenderKeysEnabled = false
+    val isSharedSenderKeysEnabled = true
     
     public fun createClosedGroup(context: Context, name: String, members: Collection<String>): String {
         // Prepare
@@ -45,7 +46,7 @@ object ClosedGroupsProtocol {
             ClosedGroupSenderKey(Hex.fromStringCondensed(ratchet.chainKey), ratchet.keyIndex, Hex.fromStringCondensed(publicKey))
         }
         // Create the group
-        val groupID = GroupUtil.getEncodedId(Hex.fromStringCondensed(groupPublicKey), false)
+        val groupID = doubleEncodeGroupID(groupPublicKey)
         val admins = setOf( userPublicKey )
         DatabaseFactory.getGroupDatabase(context).create(groupID, name, LinkedList<Address>(members.map { Address.fromSerialized(it) }),
             null, null, LinkedList<Address>(admins.map { Address.fromSerialized(it) }))
@@ -74,7 +75,7 @@ object ClosedGroupsProtocol {
         // Prepare
         val sskDatabase = DatabaseFactory.getSSKDatabase(context)
         val groupDB = DatabaseFactory.getGroupDatabase(context)
-        val groupID = GroupUtil.getEncodedId(Hex.fromStringCondensed(groupPublicKey), false)
+        val groupID = doubleEncodeGroupID(groupPublicKey)
         val group = groupDB.getGroup(groupID).orNull()
         if (group == null) {
             Log.d("Loki", "Can't add users to nonexistent closed group.")
@@ -136,7 +137,7 @@ object ClosedGroupsProtocol {
             return
         }
         val groupDB = DatabaseFactory.getGroupDatabase(context)
-        val groupID = GroupUtil.getEncodedId(Hex.fromStringCondensed(groupPublicKey), false)
+        val groupID = doubleEncodeGroupID(groupPublicKey)
         val group = groupDB.getGroup(groupID).orNull()
         if (group == null) {
             Log.d("Loki", "Can't add users to nonexistent closed group.")
@@ -241,15 +242,14 @@ object ClosedGroupsProtocol {
             sskDatabase.setClosedGroupRatchet(groupPublicKey, senderKey.publicKey.toHexString(), ratchet)
         }
         // Create the group
-        val groupID = GroupUtil.getEncodedId(Hex.fromStringCondensed(groupPublicKey), false)
+        val groupID = doubleEncodeGroupID(groupPublicKey)
         DatabaseFactory.getGroupDatabase(context).create(groupID, name, LinkedList<Address>(members.map { Address.fromSerialized(it) }),
             null, null, LinkedList<Address>(admins.map { Address.fromSerialized(it) }))
         DatabaseFactory.getRecipientDatabase(context).setProfileSharing(Recipient.from(context, Address.fromSerialized(groupID), false), true)
         // Add the group to the user's set of public keys to poll for
         sskDatabase.setClosedGroupPrivateKey(groupPublicKey, groupPrivateKey.toHexString())
         // Notify the user
-        val threadID = DatabaseFactory.getThreadDatabase(context).getThreadIdFor(Recipient.from(context, Address.fromSerialized(groupID), false))
-        insertIncomingInfoMessage(context, groupID, GroupContext.Type.UPDATE, SignalServiceGroup.Type.UPDATE, name, members, admins, threadID)
+        insertIncomingInfoMessage(context, groupID, GroupContext.Type.UPDATE, SignalServiceGroup.Type.UPDATE, name, members, admins)
         // Establish sessions if needed
         establishSessionsWithMembersIfNeeded(context, members)
     }
@@ -267,7 +267,7 @@ object ClosedGroupsProtocol {
         val members = closedGroupUpdate.membersList.map { it.toByteArray().toHexString() }
         val admins = closedGroupUpdate.adminsList.map { it.toByteArray().toHexString() }
         val groupDB = DatabaseFactory.getGroupDatabase(context)
-        val groupID = GroupUtil.getEncodedId(Hex.fromStringCondensed(groupPublicKey), false)
+        val groupID = doubleEncodeGroupID(groupPublicKey)
         val group = groupDB.getGroup(groupID).orNull()
         if (group == null) {
             Log.d("Loki", "Ignoring closed group info message for nonexistent group.")
@@ -312,8 +312,7 @@ object ClosedGroupsProtocol {
         // Notify the user
         val type0 = if (wasAnyUserRemoved) GroupContext.Type.QUIT else GroupContext.Type.UPDATE
         val type1 = if (wasAnyUserRemoved) SignalServiceGroup.Type.QUIT else SignalServiceGroup.Type.UPDATE
-        val threadID = DatabaseFactory.getThreadDatabase(context).getThreadIdFor(Recipient.from(context, Address.fromSerialized(groupID), false))
-        insertIncomingInfoMessage(context, groupID, type0, type1, name, members, admins, threadID)
+        insertIncomingInfoMessage(context, groupID, type0, type1, name, members, admins)
     }
 
     public fun handleSenderKeyRequest(context: Context, closedGroupUpdate: SignalServiceProtos.ClosedGroupUpdate, senderPublicKey: String) {
@@ -321,7 +320,7 @@ object ClosedGroupsProtocol {
         val userPublicKey = TextSecurePreferences.getLocalNumber(context)
         val groupPublicKey = closedGroupUpdate.groupPublicKey.toByteArray().toHexString()
         val groupDB = DatabaseFactory.getGroupDatabase(context)
-        val groupID = GroupUtil.getEncodedId(Hex.fromStringCondensed(groupPublicKey), false)
+        val groupID = doubleEncodeGroupID(groupPublicKey)
         val group = groupDB.getGroup(groupID).orNull()
         if (group == null) {
             Log.d("Loki", "Ignoring closed group sender key request for nonexistent group.")
@@ -346,7 +345,7 @@ object ClosedGroupsProtocol {
         val sskDatabase = DatabaseFactory.getSSKDatabase(context)
         val groupPublicKey = closedGroupUpdate.groupPublicKey.toByteArray().toHexString()
         val groupDB = DatabaseFactory.getGroupDatabase(context)
-        val groupID = GroupUtil.getEncodedId(Hex.fromStringCondensed(groupPublicKey), false)
+        val groupID = doubleEncodeGroupID(groupPublicKey)
         val group = groupDB.getGroup(groupID).orNull()
         if (group == null) {
             Log.d("Loki", "Ignoring closed group sender key for nonexistent group.")
@@ -390,7 +389,7 @@ object ClosedGroupsProtocol {
         if (GroupUtil.isOpenGroup(groupID)) {
             return listOf( Address.fromSerialized(groupID) )
         } else {
-            val groupPublicKey = GroupUtil.getDecodedId(groupID).toHexString()
+            val groupPublicKey = doubleDecodeGroupID(groupID).toHexString()
             if (DatabaseFactory.getSSKDatabase(context).isSSKBasedClosedGroup(groupPublicKey)) {
                 return listOf( Address.fromSerialized(groupPublicKey) )
             } else {
@@ -456,7 +455,7 @@ object ClosedGroupsProtocol {
     }
 
     private fun insertIncomingInfoMessage(context: Context, groupID: String, type0: GroupContext.Type, type1: SignalServiceGroup.Type, name: String,
-        members: Collection<String>, admins: Collection<String>, threadID: Long) {
+        members: Collection<String>, admins: Collection<String>) {
         val groupContextBuilder = GroupContext.newBuilder()
             .setId(ByteString.copyFrom(GroupUtil.getDecodedId(groupID)))
             .setType(type0)
@@ -484,4 +483,18 @@ object ClosedGroupsProtocol {
         val infoMessageID = mmsDB.insertMessageOutbox(infoMessage, threadID, false, null)
         mmsDB.markAsSent(infoMessageID, true)
     }
+
+    // NOTE: Signal group ID handling is weird. The ID is double encoded in the database, but not in a `GroupContext`.
+
+    @JvmStatic
+    @Throws(IOException::class)
+    public fun doubleEncodeGroupID(groupPublicKey: String): String {
+        return GroupUtil.getEncodedId(GroupUtil.getEncodedId(Hex.fromStringCondensed(groupPublicKey), false).toByteArray(), false)
+    }
+
+    @JvmStatic
+    @Throws(IOException::class)
+    public fun doubleDecodeGroupID(groupID: String): ByteArray {
+        return GroupUtil.getDecodedId(GroupUtil.getDecodedStringId(groupID))
+    }
 }
\ No newline at end of file