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Situations can arise in which organizations have to merge policies that are based on different access control frameworks, such as Role Based Access Control (RBAC) and Mandatory Access Control (MAC). Integrating policies requires addressing the following question: How will the integration impact access to protected resources? In particular, one needs to determine that the integration does not result in security breaches or unavailability of resources. A way of addressing these concerns is to model the access control frameworks, compose the models, and analyze the resulting model to identify problems. In this paper we outline a technique for modeling and composing access control policy frameworks. Specifically, we model RBAC and MAC using a variant of the Unified Modeling Language (UML) and show how to compose the models. The composed model can be used as a base for defining access control policies in a military domain.

Using Parameterized UML to Specify and Compose Access Control Models