Bisimulations Respecting Duration and Causality for the Non-interleaving Applied ≠-Calculus

Clément Aubert, Ross Horne, Christian Johansen

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


This paper shows how we can make use of an asynchronous transition system, whose transitions are labelled with events and which is equipped with a notion of independence of events, to define non-interleaving semantics for the applied ≠ -calculus. The most important notions we define are: Start-Termination or ST-bisimilarity, preserving duration of events; and History-Preserving or HP-bisimilarity, preserving causality. We point out that corresponding similarity preorders expose clearly distinctions between these semantics. We draw particular attention to the distinguishing power of HP failure similarity, and discuss how it affects the attacker threat model against which we verify security and privacy properties. We also compare existing notions of located bisimilarity to the definitions we introduce.

Original languageEnglish (US)
Pages (from-to)3-22
Number of pages20
JournalElectronic Proceedings in Theoretical Computer Science, EPTCS
StatePublished - Sep 6 2022
EventCombined 29th International Workshop on Expressiveness in Concurrency and 19th Workshop on Structural Operational Semantics, EXPRESS/SOS 2022 - Warsaw, Poland
Duration: Sep 12 2022 → …

ASJC Scopus subject areas

  • Software


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