Abstract
Role-based access control provides a very flexible set of mechanisms for managing the access control of a complex system with many users, objects and applications. The role graph model of Nyanchama and Osborn is one example of how role administration algorithms can be implemented. In our previous research, we have also shown how the access control information of existing systems can be extracted and represented as a role graph. In this paper, we extend this research by showing how, when two systems are being integrated, their role graphs can also be integrated.
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