User Identity Management And Access Control Technology Research

User administration has been the key in network information systems , it is a secure question that if to effectively manage users accessing enterprise information systems. So it has been regarded extraordinarily. Now there have lots of technology that are applied by enterprises to limit users accessing enterprise information systems, Authentication and Access Control are absolutely necessary both of techniques. The following is the work that the dissertation mainly studies and develops. Firstly the dissertation narrates the development and present state of user administration and correlative techniques (Identity management, Identity Authentication, Authorization Management, Access control) . Secondly it profoundly studies Role-Based Access Control, and on the base of the study it extends RBAC and brings Rule-driven RBAC forward, and provides the applied model of RBAC in the Enterprise Information Management Portal. Thirdly it describes the development of Unified User Management system in Enterprise Information Management Portal to explain the matter being related to user administration on base of RBAC. Fourthly it provides a model of implementing SSO by concentrative user management and Kerberos mechanism in Enterprise Information Management Portal after it researches Identity Authentication and Single Sing-on. Fifthly the dissertation provides the course to implement Single Sing-on and Access Control in Enterprise Information Management Portal.