A Dynamic Trust Computation Model for Peer to Peer Network

Reliable Peer to Peer (P2P) communication has always been a challenging task for P2P system designers. Trust models try to alleviate problems in P2P systems by incorporating a variety of approaches and schemes. However, most of the current models measure the trustworthiness of a peer only by its trust value which results in inefficient mechanisms of dealing with malicious peers. This paper proposes a unique way of computing the trust value of peers in two steps; by computing the trust value of a peer after each transaction and computing the trust value after a periodic interval of time, namely the transactional trust and revised trust respectively. In the proposed P2P architecture, peers are distributed into groups and each group has a central peer which is responsible for the peers in its group. A management peer is used to manage the central peers and it takes care of all other management activities in the system. The simulation results validate the fact that the proposed trust computation model is accurate and computes the trust efficiently.