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Patterns are useful knowledge about recurring problems and solutions. Detecting a security problem using patterns in requirements models may lead to its early solution. In order to facilitate early detection and resolution of security problems, in this paper, we formally describe a role-based access control (RBAC) as a pattern that may occur in stakeholder requirements models. We also implemented in our goal-oriented modeling tool the formally described pattern using model-driven queries anddoi:10.1145/1456362.1456366 dblp:conf/ccs/YuKWXHY08 fatcat:5tzijfeidbg5llabpho3thishu