In this paper we tackle the opacity enforcement problem in discrete event systems using supervisory control theory. In particular, we consider the case where the intruder and the supervisor may observe different sets of events and neither of these sets needs to be contained in the other one. Moreover, there may be controllable events that cannot be observed by the supervisor. We propose a finite structure, called an augmented I-observer, to characterize the strings that will not leak the secret. Based on such a structure, a locally optimal supervisor enforcing current-state opacity is designed.

Current-state opacity enforcement in discrete event systems under incomparable observations

Tong, Yin;LI, ZHIWU
;
Seatzu, Carla;Giua, Alessandro
2018-01-01

Abstract

In this paper we tackle the opacity enforcement problem in discrete event systems using supervisory control theory. In particular, we consider the case where the intruder and the supervisor may observe different sets of events and neither of these sets needs to be contained in the other one. Moreover, there may be controllable events that cannot be observed by the supervisor. We propose a finite structure, called an augmented I-observer, to characterize the strings that will not leak the secret. Based on such a structure, a locally optimal supervisor enforcing current-state opacity is designed.
2018
Discrete event systems; Finite state automata; Opacity; Supervisory control; Control and Systems Engineering; Modeling and Simulation; Electrical and Electronic Engineering
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/238251
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