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The Semantics of Role-Based Trust Management Languages

Abstract : Role-based Trust management (RT) languages are used for representing policies and credentials in decentralized, distributed access control systems. RT languages combine trust management and role-based access control features. A credential provides information about the keys, rights and qualifications from one or more trusted authorities. The paper presents a set-theoretic semantics of Role-based Trust management languages, which maps a role to a set of sets of entity names. The semantics applies not only to the basic language of the family RT0, but also to a much more sophisticated RTT, which provides manifold roles and role-product operators to express threshold and separation-of-duty policies. A manifold role defines sets of entities whose cooperation satisfies the manifold role. It enables to express a such a condition, which need more than one member of a role to effectively fulfill the particular task.
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Anna Felkner, Krzysztof Sacha. The Semantics of Role-Based Trust Management Languages. 4th Central and East European Conference on Software Engineering Techniques (CEESET), Oct 2009, Krakow, Poland. pp.179-189, ⟨10.1007/978-3-642-28038-2_14⟩. ⟨hal-01527385⟩



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