一种有效的Peer-to-Peer环境下的Trust模型

现有的单粒度信任模型不能很好地解决可信度计算的粒度问题,而多粒度模型在度量节点可信度时,仅考虑了相关领域的包含关系,欠缺对相交关系的考虑.据此,提出了一种新的Peer-to-Peer环境下的多粒度信任模型,该模型可以针对节点在具体的领域计算其可信度,并在计算过程中考虑了相关领域的相交关系.首先给出了领域模型的定义,在此基础上给出了信任模型的定义,然后对模型的迭代收敛问题以及可信度的分布式放置和获取问题作了深入的探讨.分析表明,该模型较已有模型在可信度计算的粒度及工程可行性等方面有较大的提高.

An Efficient Trust Model for Peer-to-Peer Environment

The current single trust model can not deal with the trust computation well for different aspects and,on the other hand,the multiple-grain trust model only considers the inclusion relation between different domains but takes no account of their intersection relation.A novel Peer-to-Peer trust model is thus presented on the basis of domain model,which considers both the trust computation of different aspects and the intersection relation between different domains.Defining the domain model,the trust model is formally defined.Then,the convergence of iteration for trust computation is analyzed and the methods of distributed placement and acquisition of trust are given.Compared to the current trust model,the proposed one is more precision in trust computation of multiple aspects and more feasible in practical projects to compute peer trust.