Understanding Trust Management Systems

  • Authors:
  • Stephen Weeks

  • Affiliations:
  • -

  • Venue:
  • SP '01 Proceedings of the 2001 IEEE Symposium on Security and Privacy
  • Year:
  • 2001

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Abstract

Abstract: This paper presents a mathematical framework for expressing trust management systems. The framework makes it easier to understand existing systems and to compare them to one another, as well as to design new systems. The framework defines the semantics of a trust management engine via a least fixpoint in a lattice, which, in some situations, leads to an efficient implementation. To demonstrate its flexibility, we present KeyNote and SPKI as instantiations of the framework.