Stabilizing certificate dispersal

  • Authors:
  • Mohamed G. Gouda;Eunjin (EJ) Jung

  • Affiliations:
  • Department of Computer Sciences, The University of Texas at Austin, Austin, TX;Department of Computer Sciences, The University of Texas at Austin, Austin, TX

  • Venue:
  • SSS'05 Proceedings of the 7th international conference on Self-Stabilizing Systems
  • Year:
  • 2005

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Abstract

A certificate issued by a user u for another user v enables any user that knows the public key of u to obtain the public key of v. A certificate dispersalD assigns a set of certificates D.u to each user u in the system so that user u can find a public key of any other user v without consulting a third party. In this paper, we present a stabilizing certificate dispersal protocol that tolerates transient faults and changes in the certificate system. For example, when a certificate is issued or revoked, this change may lead the system into a state where the set of certificates assigned to each user no longer constitutes a certificate dispersal. Our “dynamic dispersal” protocol eventually brings the system back to a legitimate state where the set of certificates assigned to each user constitutes a certificate dispersal.