网格资源访问的一种主观信任机制

A Subjective Trust Mechanism of Resource Access in Grid

针对网格环境资源访问过程中的信任问题,为避免主观随意性,提出了基于贝叶斯函数的信任机制,通过判断并使用推荐能力最强的中间节点作为推荐者,搜索出对资源节点的信任链路,使用贝叶斯函数对由信任链路得到的资源节点的每种属性进行综合判断,最终确定是否访问该资源节点,模拟实验结果表明该信任模型的有效性.

To solve the trust problem during resource access in grid service and to avoid subjective notion during the execution of subjective trust, the trust mechanism based Beta function is proposed. The trust relations are set up upon recommendations among nodes from the reference of social network relation. Through judging the recommendation ability of medium nodes according to the former interaction result with the method of probability and statistics, the best recommendation ability nodes are selected as the recommenders to search trust links according to the limitation of the requester about link recommendation value and recommendation number, the trust values of each attribute for the resource node presented by the last nodes on the trust links are synthesized with Beta function to decide whether the access to resource node can be enforced. The experimental result expresses its validity.