Publikationen

Autor	Kremer, Steve; Künnemann, Robert
Datum	2014
Art	Conference Proceedings
Abstrakt	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, 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. An 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 useqs 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.
ISBN	978-1-4799-4686-0
Serie	SP '14
In	Proceedings of the 2014 IEEE Symposium on Security and Privacy, p.163-178
Publisher	IEEE Computer Society
Schlüssel	TUD-CS-2014-1110
Url	https://tubiblio.ulb.tu-darmstadt.de/id/eprint/98216