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In ownership-based access control frameworks with the possibility ofdelegating permissions and administrative rights, delegation chains will form.There are different ways to treat delegation chains when revoking rights, whichgive rise to different revocation schemes. In this paper, we investigate theproblem of delegation revocation from the perspective of the knowledge baseparadigm. A knowledge base is a formal specification of domain knowledge in arich formal language. Multiple forms of inference can be applied to this formalspecification in order to solve various problems and tasks that arise in thedomain. In other words, the paradigm proposes a strict separation of concernsbetween information and problem solving. The knowledge base that we use in thispaper specifies the effects of the various revocation schemes. By applyingdifferent inferences to this knowledge base, we can solve the following tasks:to determine the state of the system after a certain delegation or revocation;to interactively simulate the progression of the system state through time; todetermine whether a user has a certain permission or administrative right givena certain state of the system; to verify invariants of the system; and todetermine which revocation schemes give rise to a certain specified set ofdesired outcomes.

Technical report of "The Knowledge Base Paradigm Applied to Delegation Revocation"