Modelling and verifying key-exchange protocols using CSP and FDR

  • Authors:
  • A. W. Roscoe

  • Affiliations:
  • -

  • Venue:
  • CSFW '95 Proceedings of the 8th IEEE workshop on Computer Security Foundations
  • Year:
  • 1995

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Abstract

We discuss the issues involved in modelling and verifying key-exchange protocols within the framework of CSP and its model-checking tool FDR. Expressing such protocols within a process algebra forces careful consideration of exception handling, and makes it natural to consider the closely connected issues of commitment and no-loss-of service. We argue that it is often better to specify key exchange mechanisms in the context of an enclosing system rather than in isolation.