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Partial Order Reduction for Security Protocols

Authors: David Baelde, Stéphanie Delaune, and Lucca Hirschi

Published in: LIPIcs, Volume 42, 26th International Conference on Concurrency Theory (CONCUR 2015)

Security protocols are concurrent processes that communicate using cryptography with the aim of achieving various security properties. Recent work on their formal verification has brought procedures and tools for deciding trace equivalence properties (e.g. anonymity, unlinkability, vote secrecy) for a bounded number of sessions. However, these procedures are based on a naive symbolic exploration of all traces of the considered processes which, unsurprisingly, greatly limits the scalability and practical impact of the verification tools. In this paper, we mitigate this difficulty by developing partial order reduction techniques for the verification of security protocols. We provide reduced transition systems that optimally eliminate redundant traces, and which are adequate for model-checking trace equivalence properties of protocols by means of symbolic execution. We have implemented our reductions in the tool Apte, and demonstrated that it achieves the expected speedup on various protocols.

Cite as

David Baelde, Stéphanie Delaune, and Lucca Hirschi. Partial Order Reduction for Security Protocols. In 26th International Conference on Concurrency Theory (CONCUR 2015). Leibniz International Proceedings in Informatics (LIPIcs), Volume 42, pp. 497-510, Schloss Dagstuhl - Leibniz-Zentrum für Informatik (2015)

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  author =	{Baelde, David and Delaune, St\'{e}phanie and Hirschi, Lucca},
  title =	{{Partial Order Reduction for Security Protocols}},
  booktitle =	{26th International Conference on Concurrency Theory (CONCUR 2015)},
  pages =	{497--510},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-939897-91-0},
  ISSN =	{1868-8969},
  year =	{2015},
  volume =	{42},
  editor =	{Aceto, Luca and de Frutos Escrig, David},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.CONCUR.2015.497},
  URN =		{urn:nbn:de:0030-drops-53946},
  doi =		{10.4230/LIPIcs.CONCUR.2015.497},
  annote =	{Keywords: Cryptographic protocols, verification, process algebra, trace equivalence}
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