Moved secure cookie exchange to on connect established, this means I could remove the synchronization on send, enabling muuuch more throughput, also, since the cookie isn`t sent in each message, message size should drop considerably when secure cookie handshakes are enabled. I do however have no way of testing this since it seems like the clustering stuff is totally not working when it comes to the RemoteSupport

akka-remote/src/main/scala/akka/serialization/SerializationProtocol.scala

@@ -78,10 +78,9 @@ object ActorSerialization {
             actorRef.timeout,
             Right(m.message),
             false,
-            actorRef.getSender,
-            RemoteClientSettings.SECURE_COOKIE).build)
+            actorRef.getSender))
 
-      requestProtocols.foreach(rp ⇒ builder.addMessages(rp))
+      requestProtocols.foreach(builder.addMessages(_))
     }
 
     actorRef.receiveTimeout.foreach(builder.setReceiveTimeout(_))
@@ -201,8 +200,7 @@ object RemoteActorSerialization {
     timeout: Long,
     message: Either[Throwable, Any],
     isOneWay: Boolean,
-    senderOption: Option[ActorRef],
-    secureCookie: Option[String]): RemoteMessageProtocol.Builder = {
+    senderOption: Option[ActorRef]): RemoteMessageProtocol.Builder = {
 
     val uuidProtocol = replyUuid match {
       case Left(uid)       ⇒ UuidProtocol.newBuilder.setHigh(uid.getTime).setLow(uid.getClockSeqAndNode).build
@@ -238,8 +236,6 @@ object RemoteActorSerialization {
       case s    ⇒ s
     }
 
-    secureCookie.foreach(messageBuilder.setCookie(_))
-
     /* TODO invent new supervision strategy
       actorRef.foreach { ref =>
       ref.registerSupervisorAsRemoteActor.foreach { id =>