System and method for representing and rate the trustworthiness of peers as providers of content and data (codats) relevant to the peers' interests. In one embodiment, trust may be propagated through transaction pipes (paths) along which codats located in a search for codats relevant to an area of interest may be accessed by the requestor. In some embodiments, the trust a peer has in another peer as a provider of codats may be a function of the trust values of the provider peer and all other peers on a path. If there are multiple paths, trust in the provider peer may be an average of the trust values for all the paths. Trust in a provider peer may be used to determine confidence in codats provided by the peer. Embodiments may provide mechanisms for feeding back trust information to the providing peer and for propagating trust information to other peers.