基于兴趣分组的P2P网络文件共享系统信誉模型研究

为了降低P2P文件共享的交易风险，提高交易成功率，促进网络良性持续发展，构造了一种基于节点兴趣分组的信誉模型，并建立了与之相应的节点信誉计算方法、文件共享过程、访问控制策略。本模型借鉴人类社区的思想，利用节点兴趣聚簇的特性，避开现有的全局信任模型和局部信任模型的局限性，将节点按照所需资源的类型划分成兴趣组，以此达到提高资源定位率及交易成功率、增强网络安全的目的。通过模拟仿真和分析表明，本模型具有正确性、可行性的特点，并且较已有的信任模型在完备性和安全性等方面有较大改进，达到了预期的设计目标。

Research on Reputation Model Based on Interest Group in P2P File Sharing System

In order to decrease the risk of exchange,increase the rate of successful exchange,and make the P2P file sharing system to develop continually, a reputation model based on interest group was proposed, and relevant peer reputation calculating method, file exchanging process, access controlling strategy were designed. The reputation model is derived from the thought of human community, and keeps away from the shortage of the whole trust model and the partial trust model. All peers arc grouped by the type of their resources, thus the efficiency of file exchange is higher, and the security of the network is stronger. Our simulation experiments and theoretical analysis of the reputation model prove that our model has the characteristics of correctness and feasibility. Compared with the former trust models, the model has higher maturity and security.