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Journal Articles Journal of Computer Security Year : 2016

Automated Analysis of Security Protocols with Global State


Security APIs, key servers and protocols that need to keep the status of transactions, require to maintain a global, non-monotonic state, e.g., in the form of a database or register. However, most existing automated verification tools do not support the analysis of such stateful security protocols – sometimes because of fundamental reasons, such as the encoding of the protocol as Horn clauses, which are inherently monotonic. A notable exception is the recent tamarin prover which allows specifying protocols as multiset rewrite (msr) rules, a formalism expressive enough to encode state. As multiset rewriting is a " low-level " specification language with no direct support for concurrent message passing, encoding protocols correctly is a difficult and error-prone process. We propose a process calculus which is a variant of the applied pi calculus with constructs for manipulation of a global state by processes running in parallel. We show that this language can be translated to msr rules whilst preserving all security properties expressible in a dedicated first-order logic for security properties. The translation has been implemented in a prototype tool which uses the tamarin prover as a backend. We apply the tool to several case studies among which a simplified fragment of PKCS#11, the Yubikey security token, and an optimistic contract signing protocol.
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Dates and versions

hal-01351388 , version 1 (03-08-2016)



Steve Kremer, Robert Künnemann. Automated Analysis of Security Protocols with Global State. Journal of Computer Security, 2016, 24 (5), ⟨10.3233/JCS-160556⟩. ⟨hal-01351388⟩
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