Automated Trust Negotiation for Peers on the Semantic Web

In the PeerTrust project we are developing and investigating policy languages to describe trust and security requirements on the Semantic Web. Such policies will be one component of a run-time system that can negotiate to establish trust on the Semantic Web. The PeerTrust system uses guarded distributed logic programs as the basis for a simple yet expressive policy and trust negotiation language, built upon the rule layer of the Semantic Web layer cake.


  • University of Illinois at Urbana-Champaign, TrustBuilder Project
  • REWERSE Network of Excellence
  • IST/EU ELENA project
  • Internet Security Research Lab at Brigham Young University, TrustBuilder Project
  • The National Center for Supercomputing Applications (NCSA)
  • Digital Enterprise Research Institute (DERI)

NOTE: The policy framework PeerTrust is not under development anymore. A new and more complete framework, Protune, was started from scratch end 2005. More information about Protune is available at

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