中文摘要：

针对目前信任管理系统存在信任量化和传递、环状授权和冲突授权等问题,提出一种新的基于带权有向图的授权委托模型,使用带权有向图来表达主体之间的信任关系,很好地解决了这些问题.模型简单直观明了,其中的一致性验证算法经过分析和论证是正确而且有效的.

英文摘要：

To address the issues in the current trust management systems,such as evaluation and delivery of the trust,annular and conflicted delegation,a new authorization and delegation model based on weighted directed graph is brought forward.The weighted and directed graph is used to present the trust relationship between the entities.The model is simple and visual;and the algorithm of the consistence is analyzed and proved to be correct and efficient.