Journal of Guangdong University of Technology ›› 2023, Vol. 40 ›› Issue (03): 32-37.doi: 10.12052/gdutxb.210169

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Opacity Verification in Stochastic Discrete Event Systems Using Two-way Observers

Qi Guo-zhao, Liu Fu-chun, Cui Hong-gang   

  1. School of Computer Science and Technology, Guangdong University of Technology, Guangzhou 510006, China
  • Received:2021-11-05 Online:2023-05-25 Published:2023-06-08

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Abstract: The opacity of stochastic discrete event system is studied for stochastic system models. Firstly, the notions of stochastic infinite-step opacity and stochastic K-step opacity are formalized. By constructing a validator based on a two-way observer, a necessary and sufficient condition is obtained to verify the stochastic infinite-step opacity and stochastic K-step opacity of systems by using the validator of two-way observer. Finally, the verification algorithm for stochastic infinite-step opacity and stochastic K-step opacity based on two-way observer is proposed.

Key words: stochastic discrete event system, two-way observer, infinite-step opacity, K-step opacity

CLC Number: 

  • TP277
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[1] Ye Bin-bin, Liu Fu-chun. Failure Predictability of Stochastic Discrete Event Systems [J]. Journal of Guangdong University of Technology, 2018, 35(06): 83-89.
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