Graph-Based Authorization Delegation Model

There are still some shortcomings in the current trust management systems, for example, the evaluation of the trust, and the presentation of the trust among the entities. To address the issues above, a new authorization delegation model based on weighted directed graph is brought forward, uses weighted and directed graph to present the trust relationship between the entities. The model is simple and visual, and the algorithm of the compliance checking is analyzed and proved to be correct and efficient.