Cyber security

  • US 9,910,980 B2
  • Filed: 01/03/2017
  • Issued: 03/06/2018
  • Est. Priority Date: 03/15/2013
  • Status: Active Grant
First Claim
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1. A computer implemented method for detecting cyber physical system behavior, comprising:

  • utilizing one or more hardware processors and associated memory storing one or more programs for execution by the one or more hardware processors, the one or more programs including instructions for;

    receiving data from a sensor associated with the cyber physical system, wherein receiving data includes receiving time series data from the sensor monitoring a cyber-physical system;

    constructing a metrization of the data utilizing a data structuring;

    determining at least one summary variable from the metrized data, wherein the at least one summary variable is based at least in part upon automata model utilizing a probabilistic grammatical inference;

    applying a thermodynamic formalism to the at least one summary variable to classify a plurality of system behaviors;

    identifying the system behavior based at least in part on the classified plurality of system behaviors; and

    obtaining, by the one or more processors, a baseline of the system behavior associated with the classified plurality of systems behaviors;

    detecting an anomalous condition based on a deviation of the system behavior from the baseline; and

    generating an output indicating the identified system behavior or the anomalous condition.

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