Modeling Reputation Scheme in P2P File-Sharing by Stochastic Activity Networks

This paper establishes a stochastic activity network model for P2P file-sharing, to evaluate the quality of service provided. Key characteristics taken into account include the reputation scheme applied, the number of peers, fraction of malicious peers, peer churn and end-users´ behavior. The results show that reputation schemes influence the quality of service significantly. Based on the findings, some basic principles are suggested for reputation schemes, which will lead to an improved P2P system QoS.