Whitewash-Aware Reputation Management in Peer-to-Peer File Sharing Systems

In this paper, we propose new schemes for the reputation management in P2P applications which discourage whitewash while encouraging good behaviors. The basic idea of the schemes is to design update rules for the reputation scores to satisfy the following requirements: 1) the score of a peer is strictly greater than the initial score at any point in time if it conducted at least one good behavior, 2) the score gradually increases if it conducted a good behavior while it rapidly decreases if it conducted a bad behavior, and 3) the strength of penalty is refined by allowing the system to give a penalty for several consecutive rounds.