Cyber-physical system defense
First Claim
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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.
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Abstract
System and techniques for cyber-physical system defense are described herein. Sensor disagreements between a plurality of sensors over time can be sampled. Cluster analysis on the sampled sensor disagreements can be performed. A deviation indication can be provided in response to the cluster analysis resulting in disagreement density beyond a threshold.
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Citations
36 Claims
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1. A system for cyber-physical system defense, the system comprising:
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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 Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A non-transitory machine readable medium including instructions that, when executed by a machine, cause the machine to perform operations comprising:
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sampling sensor disagreements between a plurality of sensors over time; performing cluster analysis on sampled sensor disagreements including; performing a cluster analysis algorithm to calculate a time period; and determining 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 providing a deviation indication in response to the cluster analysis resulting in disagreement density beyond a threshold, the deviation indication including an alarm. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method for cyber-physical system defense, the method comprising:
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sampling sensor disagreements between a plurality of sensors over time; performing cluster analysis on sampled sensor disagreements including; performing a cluster analysis algorithm to calculate a time period; and determining 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 providing a deviation indication in response to the cluster analysis resulting in disagreement density beyond a threshold, the deviation indication including an alarm. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification