Automated Unbounded Verification of Stateful Cryptographic Protocols with Exclusive OR (Extended Version)

Abstract : Exclusive-or (XOR) operations are common in cryptographic protocols, in particular in RFID protocols and electronic payment protocols. Although there are numerous applications, due to the inherent complexity of faithful models of XOR, there is only limited tool support for the verification of cryptographic protocols using XOR. The TAMARIN prover is a state-of-the-art verification tool for cryptographic protocols in the symbolic model. In this paper, we improve the underlying theory and the tool to deal with an equational theory modeling XOR operations. The XOR theory can be freely combined with all equational theories previously supported, including user-defined equational theories. This makes TAMARIN the first tool to support simultaneously this large set of equational theories, protocols with global mutable state, an unbounded number of sessions, and complex security properties including observational equivalence. We demonstrate the effectiveness of our approach by analyzing several protocols that rely on XOR, in particular multiple RFID-protocols, where we can identify attacks as well as provide proofs.
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https://hal.archives-ouvertes.fr/hal-01780544
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Submitted on : Friday, April 27, 2018 - 3:45:06 PM
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Jannik Dreier, Lucca Hirschi, Sasa Radomirovic, Ralf Sasse. Automated Unbounded Verification of Stateful Cryptographic Protocols with Exclusive OR (Extended Version). [Research Report] LORIA, UMR 7503, Université de Lorraine, CNRS, Vandoeuvre-lès-Nancy; ETH Zurich, Switzerland; University of Dundee. 2018. ⟨hal-01780544⟩

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