作者
Ninghui Li, John C Mitchell, William H Winsborough
发表日期
2002/5/12
研讨会论文
Proceedings 2002 IEEE Symposium on Security and Privacy
页码范围
114-130
出版商
IEEE
简介
We introduce the RT framework, a family of role-based trust management languages for representing policies and credentials in distributed authorization. RT combines the strengths of role-based access control and trust-management systems and is especially suitable for attribute-based access control. Using a few simple credential forms, RT provides localized authority over roles, delegation in role definition, linked roles, and parameterized roles. RT also introduces manifold roles, which can be used to express threshold and separation-of-duty policies, and delegation of role activations. We formally define the semantics of credentials in the RT framework by presenting a translation from credentials to Datalog rules. This translation also shows that this semantics is algorithmically tractable.
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N Li, JC Mitchell, WH Winsborough - Proceedings 2002 IEEE Symposium on Security and …, 2002