1. 22/01/2004Daniel Olmedilla1 INTEGRATING PROLOG IN TRUST NEGOTIATION Software Project / Summer Semester 2004 15/04/2004 Daniel Olmedilla L3S / University of Hanover Germany

2. 22/01/2004Daniel Olmedilla2 Trust Negotiation Goal  protect resources from unauthorized access New approach to establishing trust between strangers  Initial trust among nodes is not necessary  No need for registration (or even registration automatically) Use of credentials: online analogue to the paper credentials in real life Negotiation according to policies  Access control policies can be used in both sides (requester and provider) Delegation Trust Negotiation  trust is established gradually through an iterative exchange of digital credentials

3. 22/01/2004Daniel Olmedilla3 Scenario Network Diagram

4. 22/01/2004Daniel Olmedilla4 Trust Security Agent

5. 22/01/2004Daniel Olmedilla5 References PeerTrust project page: http://www.learninglab.de/deutsch/projekte/peertrust.html http://www.learninglab.de/deutsch/projekte/peertrust.html Gavriloaie, Nejdl, Olmedilla, Seamons, Winslett No Registration Needed: How to Use Declarative Policies and Negotiation to Access Sensitive Resources on the Semantic Web In proc. of European Semantic Web Symposium, Heraklion 2004 Basney, Nejdl, Olmedilla, Welch, Winslett Negotiating Trust on the Grid In Proc. of 2nd Workshop on Semantics in P2P and Grid Computing at WWW, New York, May 2004 Nejdl, Olmedilla, Winslett PeerTrust: Automated Trust Negotiation for Peers on the Semantic Web