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arXiv · 2206.14317

Quantitative Verification of Opacity Properties in Security Systems

Chunyan Mu·David Clark
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Abstract

We delineate a methodology for the specification and verification of flow security properties expressible in the opacity framework. We propose a logic, OpacTL , for straightforwardly expressing such properties in systems that can be modelled as partially observable labelled transition systems.We develop verification techniques for analysing property opacity with respect to observation notions. Adding a probabilistic operator to the specification language enables quantitative analysis and verification. This analysis is implemented as an extension to the PRISM model checker and illustrated via a number of examples. Finally, an alternative approach to quantifying the opacity property based on entropy is sketched.

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Chunyan Mu, David Clark. 2022-06-28. Quantitative Verification of Opacity Properties in Security Systems. https://arxiv.org/abs/2206.14317

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