Predicate-based key exchange

  • Authors:
  • James Birkett;Douglas Stebila

  • Affiliations:
  • Information Security Institute, Queensland University of Technology, Brisbane, Australia;Information Security Institute, Queensland University of Technology, Brisbane, Australia

  • Venue:
  • ACISP'10 Proceedings of the 15th Australasian conference on Information security and privacy
  • Year:
  • 2010

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Abstract

We provide the first description of and security model for authenticated key exchange protocols with predicate-based authentication. In addition to the standard goal of session key security, our security model also provides for credential privacy: a participating party learns nothing more about the other party's credentials than whether they satisfy the given predicate. Our model also encompasses attribute-based key exchange since it is a special case of predicate-based key exchange. We demonstrate how to realize a secure predicate-based key exchange protocol by combining any secure predicate-based signature scheme with the basic Diffie-Hellman key exchange protocol, providing an efficient and simple solution.