DSORT-A Dynamic Self-ORganizing Trust Model for Peer to Peer Systems

Abstract—Peer to peer network (P2P) is a type of decentralized and distributed network architecture. Trust management in P2P networks encourages resource sharing among well-behaved peers and detect selfish or malicious peers to provide a more secure environment by reducing risk and uncertainty in the P2P interactions. In a distributed infrastructure without centralized server for authority, providing security mechanism is more complicated than in server-centric solutions. Therefore security issues are one of the major challenges that need to be carefully analyzed and addressed. A mechanism was developed here to decrease malicious activity in the peer to peer network system by establishing trust relations among peers in their proximity. Each peer develops its own local view of trust about the peers interacted in the past and share its acquaintance history with the peers in its peer list. Also a novel load-balancing method is proposed based on calculation of workload present at different service providers. Simulation results indicate that this model efficiently distribute workload among the service providing agents under stable condition. Keywords—peer-to-peer computing; reputation system; trust management; recommendation trust,security I