Patent ID: 11950091
Assignee: TRANSPORTATION IP HOLDINGS, LLC
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A method comprising:
generating a session key that includes a shared secret key that is known by an onboard communication system and an off-board communication system disposed off-board a vehicle system, the onboard communication system disposed onboard the vehicle system;
generating one or more encryption keys responsive to the vehicle system completing a cycle time, the one or more encryption keys being generated by hashing the session key with an identifier, the identifier being based on the cycle time, wherein the cycle time is based on a predetermined characteristic of one or more of a time or location of the vehicle system, wherein the cycle time is known by the onboard communication system and the off-board communication system;
generating one or more encrypted messages by encrypting one or more messages associated with one or more of the vehicle system or a route over which the vehicle system is configured to move based on the one or more encryption keys; and
communicating the one or more encrypted messages from the onboard communication system to the off-board communication system.