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 0:
1. A vehicle network system, the vehicle network system comprising:
a network;
a first electronic control unit connected to the network; and
a second electronic control unit connected to the network,
wherein the first electronic control unit performs operations including:
transmitting, via the network, one message, 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, and the identifier that is in the payload area indicates a position of the first data, and
wherein the second electronic control unit performs operations including:
receiving the one message transmitted via the network;
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.