Automated unbounded verification of stateful cryptographic protocols with exclusive OR

Jannik Dreier*, Lucca Hirschi, Sasa Radomirovic, Ralf Sasse

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

24 Citations (SciVal)
22 Downloads (Pure)


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.

Original languageEnglish
Title of host publication2018 IEEE 31st Computer Security Foundations Symposium (CSF)
Number of pages15
ISBN (Electronic)9781538666807
Publication statusPublished - 9 Aug 2018
Event31st IEEE Computer Security Foundations Symposium 2018 - Oxford, United Kingdom
Duration: 9 Jul 201812 Jul 2018

Publication series

NameIEEE Computer Security Foundations Symposium
ISSN (Print)1940-1434


Conference31st IEEE Computer Security Foundations Symposium 2018
Abbreviated titleCSF 2018
Country/TerritoryUnited Kingdom


  • Cryptographic-Protocols
  • Exclusive-OR
  • Formal-Verification
  • Symbolic-Model
  • Tamarin

ASJC Scopus subject areas

  • Engineering(all)


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