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METHOD FOR HANDLING TRANSMISSION OF FRAUDULENT FRAMES WITHIN IN-VEHICLE NETWORK

  • US 20160297401A1
  • Filed: 06/15/2016
  • Published: 10/13/2016
  • Est. Priority Date: 05/08/2014
  • Status: Active Grant
First Claim
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1. An anti-fraud method for use in an in-vehicle network system including a plurality of electronic control units that exchange data frames, each having added thereto a message authentication code (MAC), via at least one bus in accordance with a Controller Area Network (CAN) protocol, the anti-fraud method comprising:

  • receiving a data frame transmitted on the bus;

    generating a first message authentication code by using a MAC key and a value of a counter that counts the number of times a data frame having added thereto a message authentication code is transmitted;

    verifying that the received data frame has added thereto the generated first message authentication code;

    generating, in a case where the verification has failed, a second message authentication code by using a MAC key before update of the MAC key;

    re-verifying, in a case where the verification has failed, that the received data frame has added thereto the generated second message authentication code;

    transmitting, in a case where the re-verification has succeeded, via the bus a key-update frame indicating a request for updating the MAC key; and

    updating the MAC key in response to the transmission of the key-update frame.

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