Trust vector-based P2P trust management model

Peer-to-Peer networks are open,anonymous,and highly dynamic systems.Hackers can easily attack such systems and use them to spread malicious information after invading the system.One approach to address these problems is to establish trust relations with peers in the P2P network.This paper presents a Trust-in-Peer-to-Peer model in which each peer calculates the trust value of queried peers to build a local trust table using a trust vector.Each peer can also submit opinions about other peers to construct a global credibility table which will lead to a trust network.Simulation results show that the Trust-in Peerto-Peer model gives higher success ratios than other models with lower communication and computational overheads.The model also prevents the Sybil attack,malicious collectives attack,and free riders.This makes the P2P network more robust and extensible and increases security be establishing a more credible network.