摘要： P2P系统匿名、动态的特点使得它成为各种自私和恶意行为的温床。为了解决因P2P的高度动态特性而引起的节点欺骗问题，基于概率模型和模糊数学的基本思想，构建一个P2P安全信任模型——BGTR，实验证明，通过建立BGTR模型，P2P网络可以获得更高的安全性，能够较好地解决冒名、协同作弊以及“搭车行为”等问题

关键词: 不确定性, 贝叶斯网络, 全局信任值

Abstract: The anonymity and dynamic characters of P2P (Peer to Peer) system makes P2P become hotbed with selfish and vicious action. In order to solve the problem of node cheating caused by high dynamic property of P2P, this paper designs a security trust model——BGTR based on the idea of probability model and fuzzy mathematics. The P2P network with BGTR trust model proves higher security and it has better performance to resolve the problems of impostors, malicious collective attacks and free-rides.

Key words: uncertainty, Bayesian network, global trust value

中图分类号: 

• TP309