一种基于方差的p2p文件共享系统信任模型

the open and anonymous nature of p2p system make it a ideal environment for malicious nodes to spread unauthentic and tampered files. How to build a reliable trust relationship between peers located in different places becomes one of the most basic and core security requirements in p2p security field. Currently some reputation-based trust models have been proposed, but they have some drawbacks, such as lack of project feasibility, one-sideness and free rider; meanwhile, they lack an effective mechanism to punish unhonest nodes and to reward honest nodes. We present a novel variance-based trust mechanism based on the previous work and a distributed deployment protocols in this paper. Theoretical analysis and an experimental study show that our trust model has good performance on project feasibility and eliminating unhonest nodes from honest.