Research On Delegation Model

With developement of network technology, it has to put forward more require to official bussiness, for example, share of secure resource in job. And network condition become complexer, network almost become nakeder. One of these secure problems is how to effectively implement the management of priviledge and control of sensitive information. Idea of authorization bring quickly out the delegation. For example, today officer director A goes on errands, and officer member B exerts temporarily the privilege of A. So, delegation is useful in many situations. In this paper, I focus on the concept of delegation, design and actualization delegation model.Firstly, this paper parses the concept of delegation from "users-permissions" to "users-roles-permissions". It introduces and analyzes RBDM (Role-Based Delegation Model), several important schemes of delegation and delegation model of PMI. Secondly, with characteristics of AC (Attribute Certificate) and delegation, this paper brings forward AC based delegation model. Using two ACs, PC (Priviledge Certificate) and DC (Delelgation Certificate), they can complete trasfering the priviledges between users. It is not only resolve the trust problem between users, but also enhace the functionality of delegation. Finally, it discusses the implemention of delegation.