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Role-Based Access Control (RBAC) is supported directly or in a closely related form, by a number of products. This paper presents a formalization of RBAC using graph transformations which is a graphical specification technique based on a generalization to nonlinear structures of classical string grammars. The proposed formalization provides an intuitive description for the manipulation of graph structures as they occur in information systems access control, a specification of static and dynamic ...

A Formal Model for Role-Based Access Control Using Graph Transformation