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Organizations with stringent security requirements like banks or hospitals frequently adopt role-based access control (RBAC) principles to simplify their internal permission management. Authorization constraints represent a fundamental advanced RBAC concept enabling precise restrictions on access rights. Thereby, the complexity of the resulting security policies increases so that tool support for comfortable creation and adequate validation is required. We propose a new approach to developingdoi:10.1109/ssiri.2011.18 dblp:conf/ssiri/KuhlmannSG11 fatcat:peoj25r65bh4vof3byt3oidlzy