diff --git a/WowPacketParserModule.V11_0_0_55666/Parsers/AuthenticationHandler.cs b/WowPacketParserModule.V11_0_0_55666/Parsers/AuthenticationHandler.cs
new file mode 100644
index 0000000000..29b76b42fe
--- /dev/null
+++ b/WowPacketParserModule.V11_0_0_55666/Parsers/AuthenticationHandler.cs
@@ -0,0 +1,52 @@
+using System.Text;
+using WowPacketParser.Enums;
+using WowPacketParser.Misc;
+using WowPacketParser.Parsing;
+
+namespace WowPacketParserModule.V11_0_0_55666.Parsers
+{
+    public static class AuthenticationHandler
+    {
+        [Parser(Opcode.SMSG_AUTH_CHALLENGE)]
+        public static void HandleServerAuthChallenge(Packet packet)
+        {
+            for (uint i = 0; i < 8; ++i)
+                packet.ReadUInt32("DosChallenge", i);
+            if (ClientVersion.RemovedInVersion(ClientVersionBuild.V11_0_7_58123))
+                packet.ReadBytes("Challenge", 16);
+            if (ClientVersion.AddedInVersion(ClientVersionBuild.V11_0_7_58123))
+                packet.ReadBytes("Challenge", 32);
+            packet.ReadByte("DosZeroBits");
+        }
+
+        [Parser(Opcode.CMSG_AUTH_CONTINUED_SESSION)]
+        public static void HandleRedirectAuthProof(Packet packet)
+        {
+            packet.ReadInt64("DosResponse");
+            packet.ReadInt64("Key");
+            if (ClientVersion.RemovedInVersion(ClientVersionBuild.V11_0_7_58123))
+                packet.ReadBytes("LocalChallenge", 16);
+            if (ClientVersion.AddedInVersion(ClientVersionBuild.V11_0_7_58123))
+                packet.ReadBytes("LocalChallenge", 32);
+            packet.ReadBytes("Digest", 24);
+        }
+
+        [Parser(Opcode.CMSG_AUTH_SESSION)]
+        public static void HandleAuthSession(Packet packet)
+        {
+            packet.ReadUInt64("DosResponse");
+            packet.ReadUInt32("RegionID");
+            packet.ReadUInt32("BattlegroupID");
+            packet.ReadUInt32("RealmID");
+            if (ClientVersion.RemovedInVersion(ClientVersionBuild.V11_0_7_58123))
+                packet.ReadBytes("LocalChallenge", 16);
+            if (ClientVersion.AddedInVersion(ClientVersionBuild.V11_0_7_58123))
+                packet.ReadBytes("LocalChallenge", 32);
+            packet.ReadBytes("Digest", 24);
+            packet.ReadBit("UseIPv6");
+
+            var realmJoinTicketSize = packet.ReadInt32();
+            packet.ReadBytes("RealmJoinTicket", realmJoinTicketSize);
+        }
+    }
+}