Trust based incentive in P2P network

In the world of Internet technologies, Peer-to-Peer (P2P) computing is currently receiving considerable interest. However, as experience with P2P networks such as Gnutella shows, the selfish behaviors of peers may lead to serious problems of P2P network, such as Free-riding and Tragedy of Commons. In order to solve these problems, there are increasingly considerations on incentive design in the study of P2P systems. In this paper, we give a brief survey of researches on trust based incentive in P2P network. By investigating the reputation systems in P2P networks, we outline some key issues within the design of trust based incentive in P2P networks. After that we introduce some other approaches addressing the incentive of P2P networks and conclude the paper with a summary and discussion on future research.