On the Performance Degradation of Cyber-Physical Systems Under Stealthy Integrity Attacks

This technical note analyzes the effect of stealthy integrity attacks on Cyber-Physical Systems, which is modeled as a Stochastic Linear Time-Invariant (LTI) system equipped with a linear filter, a linear feedback controller and a χ 2 failure detector. An attacker wishes to induce perturbation in th...

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Bibliographic Details
Published in:IEEE transactions on automatic control 2016-09, Vol.61 (9), p.2618-2624
Main Authors: Yilin Mo, Sinopoli, Bruno
Format: Article
Language:English
Subjects:
Approximation methods
Calculus
Controllers
Detectors
Ellipsoids
Failure analysis
Integrity
Linear systems
Mathematical analysis
Performance degradation
Perturbation methods
robustness
SCADA systems
security
Sensor systems
Yttrium
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Summary:This technical note analyzes the effect of stealthy integrity attacks on Cyber-Physical Systems, which is modeled as a Stochastic Linear Time-Invariant (LTI) system equipped with a linear filter, a linear feedback controller and a χ 2 failure detector. An attacker wishes to induce perturbation in the control loop by compromising a subset of the sensors and injecting an exogenous control input, without incurring detection from an anomaly detector. We show how the problem can be modeled, from the attacker's standpoint, as a constrained control problem and that the characterization of the maximum perturbation can be posed as reachable set computation, which we solve using ellipsoidal calculus.
ISSN:0018-9286
1558-2523
DOI:10.1109/TAC.2015.2498708