Diego Agustín Ambrossio

Diego Agustín Ambrossio, Marcos Cramer

Distributed Autoepistemic Logic with Inductive Definitions (dAEL(ID)) is a recently proposed non-monotonic logic for says-based access control. We define a query-driven decision procedure for dAEL(ID) that is implemented in the knowledge-base system IDP. The decision procedure is designed in such a way that it allows one to determine access rights while avoiding redundant information flow between principals in order to enhance security and reduce privacy concerns. Given that the decision procedure has in the worst case an exponential runtime, it is to be regarded as a proof of concept that increases our understanding of dAEL(ID), rather than being deployed for an access control system.

Marcos Cramer, Pieter Van Hertum, Diego Agustin Ambrossio et al.

In ownership-based access control frameworks with the possibility of delegating permissions and administrative rights, chains of delegated accesses will form. There are different ways to treat these delegation chains when revoking rights, which give rise to different revocation schemes. In this paper, we show how IDP - a knowledge base system that integrates technology from ASP, SAT and CP - can be used to efficiently implement executable revocation schemes for an ownership-based access control system based on a declarative specification of their properties.