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In this paper we describe the formal specification language RASP for expressing fine-grained access control constraints in information systems.The design of the language is motivated by a number of IS case studies which demonstrate the complexity of the access constraints which arise if minimal (need-to-know) access is to be strictly enforced. RASP supports modularity, parameterization, role acquisition, constraint expressions and a symmetrical approach to role transitions and attribute transitions. No existing access control specification language supports all of these complex, realistic requirements |
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