Role based Access Control and its application in high speed railway

Role-based Access Control (RBAC) is a means to ensure the security of information system resources. This paper describes the RBAC model and gives its formal definition. Then RBAC model is applied to ATP management information system, and physical data model of access control is designed. Finally it realized restrict access to the critical resources of system. The system was used successfully, which indicated that RBAC model can effectively control access of information systems.