A secure messaging communication system. A communication bus communicates messages between transmitting nodes. A secure hardware engine of a controller authenticates messages from requesting entities. A processor of the controller initially receives messages from the requesting entities. The processor includes a message request queue prioritizing received messages. The processor communicates a prioritized message from the request queue and associated authentication information to the secure hardware engine. The secure hardware engine authenticates the messages in response to receiving the prioritized messages and associated authentication information from the processor. The secure hardware engine communicates the authenticated messages to the processor for storage in a results queue.
