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Paper detail

The Logic of XACML - Extended

We study the international standard XACML 3.0 for describing security access control policy in a compositional way. Our main contribution is to derive a logic that precisely captures the idea behind the standard and to formally define the semantics of the policy combining algorithms of XACML. To guard against modelling artefacts we provide an alternative way of characterizing the policy combining algorithms and we formally prove the equivalence of these approaches. This allows us to pinpoint the shortcoming of previous approaches to formalization based either on Belnap logic or on D-algebra.

preprint2011arXivOpen access
Carroline Dewi Puspa Kencana RamliHanne Riis NielsonFlemming Nielson
Logic in Computer ScienceCryptography and Security
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Carroline Dewi Puspa Kencana RamliHanne Riis NielsonFlemming Nielson

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