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Role-based access control models have attracted appreciable research interest in past time due to their providing some flexibility to security management and ability to model organizational structure and their capability to reduce administrative expenses. In this paper, the authors explains the drawbacks of RBAC96 model in the aspect of the authorization, access rules and fine-grain access controls in the practical application and established a extended-RBAC model, named as JV-RBAC (Joshi-Vaisla RBAC), which integrates the authorization of users and roles, authentication is implemented by X.509 and providing higher security by introducing access rules and audit function.
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