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- W4246464077 abstract "We consider the estimation of a scalar state based on m measurements that can be potentially manipulated by an adversary. The attacker is assumed to have full knowledge about the true value of the state to be estimated and about the value of all the measurements. However, the attacker has limited resources and can only manipulate up to l of the m measurements. The problem is formulated as a minimax optimization, where one seeks to construct an optimal estimator that minimizes the “worst-case” mean squared error against all possible manipulations by the attacker. We show that if the attacker can manipulate at least half the measurements (l ≥ m/2), then the optimal worst-case estimator should ignore all measurements and be based solely on the a-priori information. We also provide the explicit form of the optimal symmetric estimator when the attacker can manipulate less than half the measurements (l <; m/2), which is based on equation local estimators. We further prove that such an estimator can be reduced into simpler forms for two special cases, i.e., either the local estimator is monotone or m = 2l + 1. Finally we apply the proposed methodology in the case of i.i.d. Gaussian measurements." @default.
- W4246464077 created "2022-05-12" @default.
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- W4246464077 date "2013-12-01" @default.
- W4246464077 modified "2023-09-26" @default.
- W4246464077 title "Robust estimation in the presence of integrity attacks" @default.
- W4246464077 doi "https://doi.org/10.1109/cdc.2013.6760851" @default.
- W4246464077 hasPublicationYear "2013" @default.
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