P2P环境下基于Vague集理论的主观信任模型研究

Research of Vague Set-based Subjective Trust Management Model for Peer-to-Peer Environment

在诸如文件共享等无中心的P2P环境下,资源共享是用户自愿的行为,用户不承担任何责任,很难通过传统的信任机制来建立用户之间的信任.参考社会学的人际关系模型和Bayesian网络信任模型,在Vague集合理论基础上,提出了一种基于推荐的主观信任管理模型,给出了防止恶意行为和服务热点问题的方法.分析及仿真实验表明,针对网络中的恶意行为,本信任模型比已有的模型有更好的安全性.

For most peer-to-peer file-swapping application,sharing is a volunteer action,and peers are not responsible for their irresponsible bartering history,therefore it is difficult to establish the trust relationship among users with traditional trust mechanism.Referring to social people trust relationship models and Bayesian networks-based trust model,we proposed a subjective trust model based on Vague set theory.In this paper,we also give the methods to prevent malicious behabiors and avoid load imbalancing.Mathematic analyses and simulations show that,compared to the current model,the proposed model is more robust on trust security.