diff --git a/dist/libsignal-protocol.js b/dist/libsignal-protocol.js
index f5e6a02..5d0f1b6 100644
--- a/dist/libsignal-protocol.js
+++ b/dist/libsignal-protocol.js
@@ -35554,13 +35554,8 @@ Internal.SessionRecord = function() {
         return JSON.stringify(ensureStringed(thing)); //TODO: jquery???
     }
 
-    var SessionRecord = function(identityKey, registrationId) {
+    var SessionRecord = function(registrationId) {
         this._sessions = {};
-        identityKey = util.toString(identityKey);
-        if (typeof identityKey !== 'string') {
-            throw new Error('SessionRecord: Invalid identityKey');
-        }
-        this.identityKey = identityKey;
         this.registrationId = registrationId;
 
         if (this.registrationId === undefined || typeof this.registrationId !== 'number') {
@@ -35570,12 +35565,12 @@ Internal.SessionRecord = function() {
 
     SessionRecord.deserialize = function(serialized) {
         var data = JSON.parse(serialized);
-        var record = new SessionRecord(data.identityKey, data.registrationId);
+        var record = new SessionRecord(data.registrationId);
         record._sessions = data.sessions;
         if (record._sessions === undefined || record._sessions === null || typeof record._sessions !== "object" || Array.isArray(record._sessions)) {
             throw new Error("Error deserializing SessionRecord");
         }
-        if (record.identityKey === undefined || record.registrationId === undefined) {
+        if (record.registrationId === undefined) {
             throw new Error("Error deserializing SessionRecord");
         }
         return record;
@@ -35585,8 +35580,7 @@ Internal.SessionRecord = function() {
         serialize: function() {
             return jsonThing({
                 sessions       : this._sessions,
-                registrationId : this.registrationId,
-                identityKey    : this.identityKey
+                registrationId : this.registrationId
             });
         },
         haveOpenSession: function() {
@@ -35654,15 +35648,6 @@ Internal.SessionRecord = function() {
 
             this.removeOldChains(session);
 
-            if (this.identityKey === null) {
-                this.identityKey = session.indexInfo.remoteIdentityKey;
-            }
-            if (util.toString(this.identityKey) !== util.toString(session.indexInfo.remoteIdentityKey)) {
-                var e = new Error("Identity key changed at session save time");
-                e.identityKey = session.indexInfo.remoteIdentityKey.toArrayBuffer();
-                throw e;
-            }
-
             sessions[util.toString(session.indexInfo.baseKey)] = session;
 
             this.removeOldSessions();
@@ -35849,14 +35834,14 @@ SessionBuilder.prototype = {
           if (serialized !== undefined) {
             record = Internal.SessionRecord.deserialize(serialized);
           } else {
-            record = new Internal.SessionRecord(device.identityKey, device.registrationId);
+            record = new Internal.SessionRecord(device.registrationId);
           }
 
           record.archiveCurrentState();
           record.updateSessionState(session, device.registrationId);
           return Promise.all([
             this.storage.storeSession(address, record.serialize()),
-            this.storage.saveIdentity(this.remoteAddress.getName(), record.identityKey)
+            this.storage.saveIdentity(this.remoteAddress.getName(), session.indexInfo.remoteIdentityKey)
           ]);
         }.bind(this));
       }.bind(this));
@@ -36193,7 +36178,6 @@ SessionCipher.prototype = {
                       throw new Error("No registrationId");
                   }
                   record = new Internal.SessionRecord(
-                      util.toString(preKeyProto.identityKey),
                       preKeyProto.registrationId
                   );
               }
diff --git a/src/SessionBuilder.js b/src/SessionBuilder.js
index 9895360..bfe1971 100644
--- a/src/SessionBuilder.js
+++ b/src/SessionBuilder.js
@@ -39,14 +39,14 @@ SessionBuilder.prototype = {
           if (serialized !== undefined) {
             record = Internal.SessionRecord.deserialize(serialized);
           } else {
-            record = new Internal.SessionRecord(device.identityKey, device.registrationId);
+            record = new Internal.SessionRecord(device.registrationId);
           }
 
           record.archiveCurrentState();
           record.updateSessionState(session, device.registrationId);
           return Promise.all([
             this.storage.storeSession(address, record.serialize()),
-            this.storage.saveIdentity(this.remoteAddress.getName(), record.identityKey)
+            this.storage.saveIdentity(this.remoteAddress.getName(), session.indexInfo.remoteIdentityKey)
           ]);
         }.bind(this));
       }.bind(this));
diff --git a/src/SessionCipher.js b/src/SessionCipher.js
index 5c6b914..076e85c 100644
--- a/src/SessionCipher.js
+++ b/src/SessionCipher.js
@@ -161,7 +161,6 @@ SessionCipher.prototype = {
                       throw new Error("No registrationId");
                   }
                   record = new Internal.SessionRecord(
-                      util.toString(preKeyProto.identityKey),
                       preKeyProto.registrationId
                   );
               }
diff --git a/src/SessionRecord.js b/src/SessionRecord.js
index b42546a..0a6a2e9 100644
--- a/src/SessionRecord.js
+++ b/src/SessionRecord.js
@@ -55,13 +55,8 @@ Internal.SessionRecord = function() {
         return JSON.stringify(ensureStringed(thing)); //TODO: jquery???
     }
 
-    var SessionRecord = function(identityKey, registrationId) {
+    var SessionRecord = function(registrationId) {
         this._sessions = {};
-        identityKey = util.toString(identityKey);
-        if (typeof identityKey !== 'string') {
-            throw new Error('SessionRecord: Invalid identityKey');
-        }
-        this.identityKey = identityKey;
         this.registrationId = registrationId;
 
         if (this.registrationId === undefined || typeof this.registrationId !== 'number') {
@@ -71,12 +66,12 @@ Internal.SessionRecord = function() {
 
     SessionRecord.deserialize = function(serialized) {
         var data = JSON.parse(serialized);
-        var record = new SessionRecord(data.identityKey, data.registrationId);
+        var record = new SessionRecord(data.registrationId);
         record._sessions = data.sessions;
         if (record._sessions === undefined || record._sessions === null || typeof record._sessions !== "object" || Array.isArray(record._sessions)) {
             throw new Error("Error deserializing SessionRecord");
         }
-        if (record.identityKey === undefined || record.registrationId === undefined) {
+        if (record.registrationId === undefined) {
             throw new Error("Error deserializing SessionRecord");
         }
         return record;
@@ -86,8 +81,7 @@ Internal.SessionRecord = function() {
         serialize: function() {
             return jsonThing({
                 sessions       : this._sessions,
-                registrationId : this.registrationId,
-                identityKey    : this.identityKey
+                registrationId : this.registrationId
             });
         },
         haveOpenSession: function() {
@@ -155,15 +149,6 @@ Internal.SessionRecord = function() {
 
             this.removeOldChains(session);
 
-            if (this.identityKey === null) {
-                this.identityKey = session.indexInfo.remoteIdentityKey;
-            }
-            if (util.toString(this.identityKey) !== util.toString(session.indexInfo.remoteIdentityKey)) {
-                var e = new Error("Identity key changed at session save time");
-                e.identityKey = session.indexInfo.remoteIdentityKey.toArrayBuffer();
-                throw e;
-            }
-
             sessions[util.toString(session.indexInfo.baseKey)] = session;
 
             this.removeOldSessions();
diff --git a/test/SessionCipherTest.js b/test/SessionCipherTest.js
index 96c5c92..88bd8fc 100644
--- a/test/SessionCipherTest.js
+++ b/test/SessionCipherTest.js
@@ -11,7 +11,7 @@ describe('SessionCipher', function() {
         var sessionCipher = new libsignal.SessionCipher(store, address.toString());
         describe('when a record exists', function() {
             before(function(done) {
-                var record = new Internal.SessionRecord('identityKey', registrationId);
+                var record = new Internal.SessionRecord(registrationId);
                 store.storeSession(address.toString(), record.serialize()).then(done);
             });
             it('returns a valid registrationId', function(done) {
@@ -36,7 +36,7 @@ describe('SessionCipher', function() {
         var sessionCipher = new libsignal.SessionCipher(store, address.toString());
         describe('registrationId is valid', function() {
             before(function(done) {
-                var record = new Internal.SessionRecord('identityKey', 1);
+                var record = new Internal.SessionRecord( 1);
                 store.storeSession(address.toString(), record.serialize()).then(done);
             });
             it('returns true for a session with a valid registrationId', function(done) {
@@ -47,7 +47,7 @@ describe('SessionCipher', function() {
         });
         describe('registrationId is null', function() {
             before(function(done) {
-                var record = new Internal.SessionRecord('identityKey');
+                var record = new Internal.SessionRecord();
                 store.storeSession(address.toString(), record.serialize()).then(done);
             });
             it('returns false for a session with a null registrationId', function(done) {