Adaptable and Secure Can Bus

A communication module is configured to communicate a first part of a message packet configured to identify message content contained in the message packet and a second part of the message packet and change the second part of the message packet in response to a trigger. A received message packet's changing portion is compared with the set of the authorized changing portions to determine whether the received message packet is authorized for the common control network. The received message packet is discarded or ignored in response to the received message packet's changing portion not matching at least one of the authorized changing portions in the set of the authorized changing portions.