Dynamic Purpose-Based Access Control

This article presents a new approach for privacy preserving access control based on RBAC. The separation of authorization of access purpose from access decision improves the flexibility of private data control. A key feature of this approach is dynamic. The access purpose is determined in a dynamic manner, based on subject attributes, context attributes and authorization policies. Intended purposes are dynamically associated with the requested data object during the access decision. Finally, we give the algorithm to achieve the compliance computation between the access purpose and intended purposes.