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 11:
12. An electronic control unit, the electronic control unit comprising:
one or more memories; and
circuitry that, in operation, performs operations, the operations including:
receiving one message, which is transmitted by another electronic control unit via a network, the one message including a header area and a payload area, wherein 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, the identifier that is in the payload area indicates a position of the first data;
selecting 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
verifying the message authentication code using the selected first data.