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- W4207062008 abstract "The problem of state estimation in the setting of partially-observed discrete event systems subject to cyber attacks is considered. An operator observes a plant through a natural projection that hides the occurrence of certain events. The objective of the operator is that of estimating the current state of the system. The observation is corrupted by an attacker which can tamper with the readings of a set of sensors thus inserting some fake events or erasing some observations. The aim of the attacker is that of altering the state estimation of the operator. An automaton, called attack structure, is defined to describe the set of all possible attacks. In more details, an unbounded attack structure is obtained by concurrent composition of two state observers, the attacker observer and the operator observer. The attack structure shows, for each possible corrupted observation, the joint state estimation, i.e., the set of states consistent with the uncorrupted observation and the set of states consistent with the corrupted observation. Such a structure can be used to establish if an attack function is harmful w.r.t. a misleading relation. Our approach is also extended to the case in which the attacker may insert at most n events between two consecutive observations." @default.
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- W4207062008 date "2021-01-01" @default.
- W4207062008 modified "2023-10-17" @default.
- W4207062008 title "Joint State Estimation Under Attack of Discrete Event Systems" @default.
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- W4207062008 doi "https://doi.org/10.1109/access.2021.3135870" @default.
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