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Paper detail

Generalized Current-State Opacity With Dynamically Changing Secrets

Opacity, an information-flow property related to the privacy and security of a system, has been extensively studied in the context of discrete event systems. Although various notions of opacity have been proposed, in all cases the considered secret was constant. This work focuses on current-state opacity, considering a scenario where the secret changes dynamically with the system evolution. In other words, we propose the new notion of generalized current-state opacity (GCSO), which is with respect to a dynamic-secret model rather than a constant secret. Moreover, we provide a method to verify GCSO based on the construction of the GCSO-verifier. Finally, a practical example is given to illustrate the proposed notion and the method for its verification.

preprint2021arXivOpen access
Dan YouShouguang WangCarla Seatzu
Systems and Controleess.SY
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Dan YouShouguang WangCarla Seatzu

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