Free riding inhibition mechanism based on user behavior in P2P file-sharing system

In order to inhibit Free Riding in Peer-to-Peer (P2P) file-sharing systems, the Free Riding Inhibition Mechanism Based on User Behavior (IM-BUB) is proposed. IMBUB considers the regularity of user behavior and models user behavior by analyzing many definitions and formulas. In IMBUB, Bandwidth Allocated Ratio, Incentive Mechanism Based on User Online Time, Double Reward Mechanism, Incentive Mechanism of Sharing for Permission and Inhibition Mechanism of White-washing Behavior are put forward to inhibit Free Riding and encourage user sharing. A P2P file system BITS-hare is designed and realized under the conditions of a campus network environment. The test results show that BITShare's Query Hit Ratio has a significant increase from 22% to 99%, and the sharing process in BITShare is very optimistic. Most users opt to use online time to exchange service quality instead of white-washing behavior, and the real white-ishing ratio in BITShare is lower than 1%. We confirm that IMBUB can effectively inhibit Free Riding behavior in P2P file-sharing systems.