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Method and system for reflectometry based communication network monitoring, intrusion detection, and message authentication

  • US 9,578,047 B2
  • Filed: 01/13/2015
  • Issued: 02/21/2017
  • Est. Priority Date: 01/13/2015
  • Status: Active Grant
First Claim
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1. A method of monitoring and detecting intrusions on an communications network, comprising:

  • monitoring, with a reflectometer, a plurality of communication channels on the communication network, the communication channels each transmitting a plurality of signals between an electronic control module and a remote electronic control module;

    extracting a reflectometry feature set from each of the plurality of signals transmitted over each of the communication channels;

    comparing the extracted reflectometry feature sets to a repository of predetermined communication network feature sets to generate a mismatch value;

    determining that an authenticated event has occurred when the mismatch value is within a predetermined threshold range and continuing to monitor the plurality of communication channels;

    determining that a flagged event has occurred when the mismatch value is outside the predetermined threshold range; and

    recording the flagged event in a memory module.

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