基于交易信息和推荐证书的P2P网络信任模型  

P2P Global Trust Model Based on History Trade Information and Recommendation Certificate

作　　者：乐光学[1] 李仁发[2] 陈丽萍[1] 

机构地区：[1]嘉兴学院信息工程学院 [2]湖南大学计算机与通信学院,湖南长沙410082

出　　处：《系统仿真学报》2007年第15期3540-3545,共6页Journal of System Simulation

基　　金：湖南省自然科学基金计划项目(05FJ3018);计算机软件新技术国家重点实验室开放基金(A2006-06)

摘　　要：由于P2P网络中存在大量欺诈行为、攻击和不可靠的服务,使服务质量无法得以较好的保证。建立节点间的信任评价机制是一个可行的解决方案,但传统网络中集中式的信任机制并不能适应P2P网络。而现有典型基于全局信任模型不能很好地解决迭代不收敛,计算开销大,存在安全隐患甚至可能出现悖论的问题。以人际网中基于个人信任资信和信任推荐构建信任关系为基础,将直接信任度推荐证书和节点的全局信任资信具有时间衰减性引入构建P2P网络的全局信任链中,提出了一种基于历史交易信息和推荐证书的P2P环境下的信任模型,根据交易的历史信息和推荐度来计算节点的全局信任度。给出了模型的数学分析和构造信任链的实现方法,同时给出了抑制恶意节点协同攻击的策略。仿真结果表明,该模型能较好的解决现有模型存在的问题,模型合理有效且工程上易实现。A large number of frauds, attacks and unreliable services exist in P2P file-sharing network, which makes the service quality unable to reach better assurance. To set up the trust and evaluation mechanism among nodes is an available scheme, but the centralized trust mechanism in the traditional networks can not adapt to the P2P network. Current p2p trust model could not promise the convergence of iteration for trust computation, and the calculating overhead is greatly, and it has the problem that the potential safety hazard may even present the paradox. By structuring credit relationship based on individual credit and trust recommending mechanism in relationship of people, time decline characteristics of trust recommendation certificate and global trust information were introduced into structuring trust chains of the P2P network, and a new P2P global trust model based on historical trade information and recommendation certificate was proposed. A peer＇s global trust was calculated according to the historical transaction information and recommendation of the peer in this model The mathematics analysis of the model was provided and the implementation method of the trust chain was constructed, and the strategies of restraining the malicious peers were provided to attack in coordination as well. The simulation results show that it could effectively solve the above problems, so the model is reasonable, effective and easy to implement on the project.

关 键 词：对等网络 信任 推荐 协同攻击 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]