Emerging approaches to enforce some form of protection in (pseudo)anonymous peer to peer systems propose the use of reputations as a means to establish the reliability of servents and/or resources. How such reputations can be exchanged, aggregated and used in actually determining the trust one may wish to put in a servent or resource is an issue still to be investigated and for which fuzzy techniques can play an important role. We present an approach for managing and exchanging reputations, based on the use of fuzzy techniques, which we adopted as part of our P2P-XRep system.