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On-vehicle communication system

  • US 10,104,094 B2
  • Filed: 12/04/2017
  • Issued: 10/16/2018
  • Est. Priority Date: 12/15/2014
  • Status: Active Grant
First Claim
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1. An Electric Control Unit (ECU) device connected to an on-vehicle network and a network outside a vehicle, the ECU comprising:

  • a network communication interface configured to communicate via the network outside of the vehicle;

    one or more processors; and

    a memory coupled with and readable by the one or more processors, whereinthe memory stores a first encryption key, andthe one or more processors are configured to;

    upon receipt of communication information from the network outside of the vehicle via the network communication interface;

    generate a transmitter code from the received communication information by using the first encryption key, the first encryption key being different from a second encryption key that is shared among other on-vehicle ECUs communicable with the ECU device via the on-vehicle network, andtransmit, to the on-vehicle network, a message data frame that includes an identifier associated with the received communication information, the received communication information, and the generated transmitter code, wherein at least one of the other on-vehicle ECUs successfully authenticates the message data frame containing the communication information by using the first encryption key to generate a receiver code, and matching the received code with the transmitter code, upon receipt of the message data frame, and successfully authenticates other message data frames generated by the other on-vehicle ECUs by use of the second encryption key to generate the transmitter code used for the matching, upon receipt of the other message data frames.

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