A Trustworthy Group Identifying Trust Metric for P2P Service Sharing Economy Based on Personal Social Network of Users

With the quick growth of sharing economy, service sharing becomes a popular phenomenon in daily lives. However, some service providers give exaggerated information about their services on the Peer-to-Peer（P2 P） service sharing platforms to get more profits. How to identify a reliable service provider becomes a difficult challenge for users. In this paper, we propose a trustworthy group trust metric for P2 P service sharing（TMPSS） economy based on personal social network（PSN） of users. Deriving from Advogato group trust metric, it considers factors such as social circle similarity, preference similarity, interaction degree, ranks the reliable nodes in a target user＇s PSN, outputs an ordered set of reliable nodes, and prevents unreliable nodes from access PSN of honest users. Experimental results show that TMPSS has advantages over existing representative methods because it finds more reliable nodes, and counts against malicious nodes＇ attacks more effectively, and it is suitable for mobile transaction circumstances.

网格环境中资源共享模型的研究

资源共享,尤其是高性能资源的共享是网格环境中需要解决的一个关键问题。在网格环境中,资源通过服务的方式提供,而GT3InformationService和P2P技术正是实现服务管理和共享的重要手段。文章首先介绍了InformationService和P2P技术的工作原理,然后,结合这两种技术的特点,提出了一种使用P2P网络进行容错的树形资源共享结构的网格环境中的服务实现共享的模型,并进行了分析。