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Bus watchman

  • US 9,840,212 B2
  • Filed: 01/06/2015
  • Issued: 12/12/2017
  • Est. Priority Date: 01/06/2014
  • Status: Active Grant
First Claim
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1. A module for providing security to an in-vehicle communication network having a bus and at least one node connected to the bus, the module comprising:

  • at least one memory having data characterizing messages that the at least one node transmits and receives via the bus during normal operation of the node;

    a communication port via which the module receives and transmits messages, the port being configured to be connected to a portion of the in-vehicle network; and

    a processor that processes, responsive to the data characterizing messages in the at least one memory, messages received via the port from the portion of the in-vehicle network to;

    determine a measure of vehicle health responsive to the data characterizing the messages;

    identify, responsive to the measure of vehicle health, an anomalous message in the received messages indicative of exposure of the in-vehicle network to damage from a cyber attack; and

    cause the module to transmit at least one signal via the port to the portion of the in-vehicle network that alters the anomalous message so that the at least one node will discard the anomalous message.

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