PP-trust-X: A system for privacy preserving trust negotiations

A. Squicciarini, E. Bertino, Elena Ferrari, F. Paci, B. Thuraisingham

Research output: Contribution to journalArticlepeer-review

61 Scopus citations


Trust negotiation is a promising approach for establishing trust in open systems, in which sensitive interactions may often occur between entities with no prior knowledge of each other. Although, to date several trust negotiation systems have been proposed, none of them fully address the problem of privacy preservation. Today, privacy is one of the major concerns of users when exchanging information through the Web and thus we believe that trust negotiation systems must effectively address privacy issues in order to be widely applicable. For these reasons, in this paper, we investigate privacy in the context of trust negotiations. We propose a set of privacy-preserving features for inclusion in any trust negotiation system, such as the support for the P3P standard, as well as a number of innovative features, such as a novel format for encoding digital credentials specifically designed for preserving privacy. Further, we present a variety of interoperable strategies to carry on the negotiation with the aim of improving both privacy and efficiency.

Original languageEnglish (US)
Article number1266981
JournalACM Transactions on Information and System Security
Issue number3
StatePublished - Jul 1 2007

All Science Journal Classification (ASJC) codes

  • Computer Science(all)
  • Safety, Risk, Reliability and Quality


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