Trust-χ: A peer-to-peer framework for trust establishment

Elisa Bertino, Elena Ferrari, Anna Cinzia Squicciarini

Research output: Contribution to journalArticlepeer-review

193 Scopus citations


In this paper, we present Trust-χX, a comprehensive XML-based framework for trust negotiations, specifically conceived for a peer-to-peer environment. Trust negotiation is a promising approach for establishing trust in open systems like the Internet, where sensitive interactions may often occur between entities at first contact, with no prior knowledge of each other. The framework we propose takes into account all aspects related to negotiations, from the specification of the profiles and policies of the involved parties to the selection of the best strategy to succeed in the negotiation. Trust-χX presents a number of innovative features, such as the support for protection of sensitive policies, the use of trust tickets to speed up the negotiation, and the support of different strategies to carry on a negotiation. In this paper, besides presenting the language to encode security information, we present the system architecture and algorithms according to which negotiations can take place.

Original languageEnglish (US)
Pages (from-to)827-842
Number of pages16
JournalIEEE Transactions on Knowledge and Data Engineering
Issue number7
StatePublished - Jul 2004

All Science Journal Classification (ASJC) codes

  • Information Systems
  • Computer Science Applications
  • Computational Theory and Mathematics


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