Trust Evaluation Based on Attributes Reduction for Peer-to-Peer Systems

The features of peer-to-peer systems, such as user anonymity and openness, result in that the traditional access control and authentication cannot effectively assist the trust negotiation in peer-to-peer systems. This paper considers the management of security in peer-to-peer system by means of trust negotiation and multi-domain technique. Aiming at the problem of the dangers hidden in credentials for trust negotiation, this paper proposes a method based on the attributes usage records to reduce the attributes sets in credentials. An evaluation method of the creditability is presented based on attributes sets. These methods reduce the possibility of unnecessary exposure of attributes and enhance the reliability and security in trust negotiation.