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Method of updating fraud detection rules for detecting malicious frames, fraud detecting electronic control unit, and on-board network system

  • US 10,372,903 B2
  • Filed: 12/16/2016
  • Issued: 08/06/2019
  • Est. Priority Date: 01/20/2015
  • Status: Active Grant
First Claim
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1. A method used in an on-board network system provided with a plurality of electronic controllers that exchange messages by communication over one or more buses, and a fraud detecting electronic controller connected to the one or more buses, the method comprising:

  • determining, in the fraud detecting electronic controller, whether or not a message transmitted on the one or more buses connected to the fraud detecting electronic controller conforms to the rules based on fraud detection rules;

    receiving, from an external device external to the on-board network system, delivery data including updated fraud detection rules and bus type information indicating one of a plurality of bus types to which the updated fraud detection rules are to be applied;

    determining whether or not a vehicle in which the on-board network system is installed is running;

    when the vehicle is determined to be running, additionally determining whether or not the bus type information indicates a drive bus which is connected to an electronic controller related to travel of the vehicle;

    (i) when the bus type information indicates the drive bus, not conducting an update process with the updated fraud detection rules; and

    (ii) when the bus type information does not indicate the drive bus, updating the fraud detection rules to the updated fraud detection rules.

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