| 摘要 |
PROBLEM TO BE SOLVED: To prevent processing operation of an ECU not connected to a network outside a vehicle from being affected by a cyber attack, in an on-vehicle communication system comprising an ECU connected to the network outside the vehicle.SOLUTION: An on-vehicle communication system 10 includes: a first ECU 11 that holds only a first cipher key of the first cipher key and a second cipher key; a second ECU 12 that holds the first cipher key; and a third ECU 13 that is connected to a network outside a vehicle and holds only the second cipher key of the first cipher key and second cipher key. The second ECU 12 transmits communication data to which a transmission side code generated using the first cipher key is added. The first ECU 11, in the case of having received the communication data, verifies a transmission side code added to the received communication data, by using a reception side code generated by using the first cipher key.SELECTED DRAWING: Figure 4 |
