Patent ID: 11971978
Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
Field: Digital communication (Electrical engineering)
Classification: CPC G  B  H | IPC B  G  H

Claim 4:
5. A method for a vehicle network system, the vehicle network system including a network, a first electronic control unit connected to the network, and a second electronic control unit connected to the network, the method comprising:
receiving, by the second electronic control unit, one message, which is transmitted by the first electronic control unit via the network, wherein the one message includes a header area and a payload area, the one message includes first data and an identifier, the first data that is in the header area or the payload area is used for a calculation for obtaining a message authentication code indicating authenticity of transmission content, and the identifier that is in the payload area indicates a position of the first data;
selecting, by the second electronic control unit, the first data used for the calculation for obtaining the message authentication code in accordance with the position of the first data indicated by the identifier included in the one message; and
performing, by the second electronic control unit, a process for verifying the message authentication code using the selected first data.