Symbolic state estimation in bounded timed labeled Petri nets

Article Automation & Control Systems

Observers for a Class of Timed Automata Based on Elapsed Time Graphs

Jun Li et al.

Summary: This article introduces a novel design principle for observers of timed discrete event systems that consider specific time semantics. By utilizing time stamps of observations, the state estimation process for labeled and timed automata can be refined, which has implications for estimation and inference tasks, as well as privacy and security issues. The article also discusses the promising application of the timed observer in the context of current-state opacity.

IEEE TRANSACTIONS ON AUTOMATIC CONTROL (2022)

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Article Automation & Control Systems

Symbolic Verification of Current-State Opacity of Discrete Event Systems Using Petri Nets

Yifan Dong et al.

Summary: This article discusses the verification of current-state opacity of a discrete event system modeled with Petri nets and proposes a new method for bounded Petri nets. Experimental studies show that symbolic methods are more efficient than traditional techniques.

IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS (2022)

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Article Automation & Control Systems

Noninterference Enforcement via Supervisory Control in Bounded Petri Nets

Francesco Basile et al.

Summary: The security of distributed control systems is vulnerable to information leaks, allowing external intruders to infer the system's state. Noninterference addresses the absence of these leak paths in a dynamic system modeled as a discrete-event system. This article proposes a supervisory control strategy to enforce noninterference in systems with information leaks, using optimization problems and a Petri net model for the solution, and demonstrates the effectiveness of the enforcement strategy through illustrative examples.

IEEE TRANSACTIONS ON AUTOMATIC CONTROL (2021)

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Article Computer Science, Hardware & Architecture