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In symbolic verification of security protocols, process equivalences have recently been used extensively to model strong secrecy, anonymity and unlinkability properties. However, tool support for automated analysis of equivalence properties is limited compared to trace properties, e.g., modeling authentication and weak notions of secrecy. In this paper, we present a novel procedure for verifying equivalences...
We introduce a new class of security protocols with an unbounded number of sessions and unlimited fresh data for which the problem of secrecy is decidable. The only constraint we place on the class is a notion of depthboundedness. Precisely we prove that, restricted to messages of up to a given size, secrecy is decidable for all depthbounded processes. This decidable fragment of security protocols...
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