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Distributed Joint Attack Detection and Secure State Estimation
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DOI：10.1109/TSIPN.2017.2760804.png)
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Abstract
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The joint task of detecting attacks and securely monitoring the state of a cyber-physical system is addressed over a cluster-based network wherein multiple fusion nodes collect data from sensors and cooperate in a neighborwise fashion in order to accomplish the task. The attack detection-state estimation problem is formulated in the context of random set theory by representing joint information on the attack presence/absence, on the system state, and on the attack signal in terms of a hybrid Bernoulli random set (HBRS) density. Then, combining previous results on HBRS recursive Bayesian filtering with novel results on KullbackLeibler averaging of HBRSs, a novel distributed HBRS filter is developed and its effectiveness is tested on a case study concerning wide-area monitoring of a power network.
Keywords:
Cyber-physical systems
distributed detection and estimation
signal attack
Bayesian state estimation
Bernoulli filter
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