Secrecy and group creation

  • Authors:
  • Luca Cardelli;Giorgio Ghelli;Andrew D. Gordon

  • Affiliations:
  • Microsoft Research, Roger Needham Building, 7 Thomson Ave, Cambridge, UK;Dipartimento di Informatica, Universití di Pisa, Via Buonarroti 2, Pisa, Italy;Microsoft Research, Roger Needham Building, 7 Thomson Ave, Cambridge, UK

  • Venue:
  • Information and Computation
  • Year:
  • 2005

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Abstract

We add an operation of group creation to the typed @p-calculus, where a group is a type for channels. Creation of fresh groups has the effect of statically preventing certain communications, and can block the accidental or malicious leakage of secrets. Intuitively, no channel belonging to a fresh group can be received by processes outside the initial scope of the group, even if those processes are untyped. We formalize this intuition by adapting a notion of secrecy introduced by Abadi, and proving a preservation of secrecy property.