×

Cyber-physical system defense

  • US 9,942,262 B1
  • Filed: 03/17/2015
  • Issued: 04/10/2018
  • Est. Priority Date: 03/19/2014
  • Status: Active Grant
First Claim
Patent Images

1. A system for cyber-physical system defense, the system comprising:

  • a sensor interface to receive sensor data from a plurality of sensors;

    a sampling circuit set to sample sensor disagreements between the plurality of sensors over time;

    a cluster circuit set to perform cluster analysis on the sampled sensor disagreements including the cluster circuit set to perform a cluster analysis algorithm to calculate a time period and determine whether a predetermined number of the sampled sensor disagreements occurred within the calculated time period, wherein the calculated time period is calculated via an inverse Gamma function with a probability parameter, a sample-size parameter, and a time-of-arrival parameter, the time-of-arrival parameter determined via measurement of a sensor system during normative testing; and

    an alert circuit set to provide a deviation indication in response to the cluster analysis resulting in disagreement density beyond a threshold, the deviation indication including an alarm.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×