References of "Knapik, Michał"
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See detailBisimulations for Verifying Strategic Abilities with an Application to the ThreeBallot Voting Protocol
Belardinelli, Francesco; Condurache, Rodica; Dima, Catalin et al

in Information and Computation (2021), 276

We propose a notion of alternating bisimulation for strategic abilities under imperfect information. The bisimulation preserves formulas of ATL$^*$ for both the {\em objective} and {\em subjective ... [more ▼]

We propose a notion of alternating bisimulation for strategic abilities under imperfect information. The bisimulation preserves formulas of ATL$^*$ for both the {\em objective} and {\em subjective} variants of the state-based semantics with imperfect information, which are commonly used in the modeling and verification of multi-agent systems. Furthermore, we apply the theoretical result to the verification of coercion-resistance in the ThreeBallot voting system, a voting protocol that does not use cryptography. In particular, we show that natural simplifications of an initial model of the protocol are in fact bisimulations of the original model, and therefore satisfy the same ATL$^*$ properties, including coercion-resistance. These simplifications allow the model-checking tool MCMAS to terminate on models with a larger number of voters and candidates, compared with the initial model. [less ▲]

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See detailMsATL: a Tool for SAT-Based ATL Satisfiability Checking
Niewiadomski, Artur; Kacprzak, Magdalena; Kurpiewski, Damian et al

in Proceedings of 19th International Conference on Autonomous Agents and Multiagent Systems AAMAS 2020 (2020)

We present MsATL: the first tool for deciding the satisfiability of Alternating-time Temporal Logic ( ATL ) with imperfect informa- tion. MsATL combines SAT Modulo Monotonic Theories solvers with existing ... [more ▼]

We present MsATL: the first tool for deciding the satisfiability of Alternating-time Temporal Logic ( ATL ) with imperfect informa- tion. MsATL combines SAT Modulo Monotonic Theories solvers with existing ATL model checkers: MCMAS and STV. The tool can deal with various semantics of ATL , including perfect and imper- fect information, and can handle additional practical requirements. MsATL can be applied for synthesis of games that conform to a given specification, with the synthesised game often being minimal. [less ▲]

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