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Abstract

Role-Based Access Control (RBAC) has become the de facto standard for realizing authorization requirements in a wide range of organizations. Existing RBAC models suffer from two main shortcomings; lack of expressiveness of roles/permissions and ambiguities of their hierarchies. Roles/permissions expressiveness is limited since roles do not have the ability to express behaviour and state, while hierarchical RBAC cannot reflect real organizational hierarchies. In this paper, we propose a novel access control model: The Role-Oriented Access Control Model (ROAC), which is based on the concepts of RBAC but inspired by the object-oriented paradigm. ROAC greatly enhances expressiveness of roles and permissions by introducing parameters and methods as members. The hierarchical ROAC model supports selective inheritance of permissions.

Keywords

Access Control RBAC Authorization Role Hierarchies 

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Copyright information

© IFIP International Federation for Information Processing 2012

Authors and Affiliations

  • Nezar Nassr
    • 1
  • Eric Steegmans
    • 1
  1. 1.Dept. of Computer Science and EngineeringKatholieke Universiteit LeuvenLeuvenBelgium

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