# APTE: An Algorithm for Proving Trace Equivalence

Cheval, Vincent (2014) APTE: An Algorithm for Proving Trace Equivalence. In: 20th International Conference on Tools and Algorithms for the Construction and Analysis of Systems (TACAS'14), Avril 2014, Grenoble, France. (doi:10.1007/978-3-642-54862-8_50) (KAR id:46724)

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## Abstract

This paper presents APTE, a new tool for automatically proving the security of cryptographic protocols. It focuses on proving trace equivalence between processes, which is crucial for specifying privacy type properties such as anonymity and unlinkability.

The tool can handle protocols expressed in a calculus similar to the applied-pi calculus, which allows us to capture most existing protocols that rely on classical cryptographic primitives. In particular, APTE handles private channels and else branches in protocols with bounded number of sessions. Unlike most equivalence verifier tools, APTE is guaranteed to terminate

Moreover, APTE is the only tool that extends the usual notion of trace equivalence by considering side-channel'' information leaked to the attacker such as the length of messages and the execution times. We illustrate APTE on different case studies which allowed us to automatically (re)-discover attacks on protocols such as the Private Authentication protocol or the protocols of the electronic passports.

Item Type: Conference or workshop item (Paper) 10.1007/978-3-642-54862-8_50 Cryptographic protocols, Formal verification, Symbolic model, Automatic, Equivalence properties, Timing attacks, Lengh attacks, Constraint systems Q Science > QA Mathematics (inc Computing science) > QA 75 Electronic computers. Computer scienceQ Science > QA Mathematics (inc Computing science) > QA 9 Formal systems, logics Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Computing Vincent Cheval 23 Jan 2015 11:35 UTC 16 Feb 2021 13:22 UTC https://kar.kent.ac.uk/id/eprint/46724 (The current URI for this page, for reference purposes)