Volume 31 Issue 03
Mar.  2005
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Xue Wei, Huai Jinpeng. Extended role-based access control model[J]. Journal of Beijing University of Aeronautics and Astronautics, 2005, 31(03): 298-302. (in Chinese)
Citation: Xue Wei, Huai Jinpeng. Extended role-based access control model[J]. Journal of Beijing University of Aeronautics and Astronautics, 2005, 31(03): 298-302. (in Chinese)

Extended role-based access control model

  • Received Date: 28 Sep 2003
  • Publish Date: 31 Mar 2005
  • An extended RBAC(role based access control) model, RTBAC (role & task based access control) model was presented. The model introduced the notions of task and task instance into RBAC96 model, formally defined the hierarchies of tasks and task instances, specified the relationships between traditional sessions and task instances as well as the relationships between task instances and permissions. Several assistant functions were defined. The model could be used to depict daily business procedures and related access control policies more naturally, so was more suitable for distributed collaborative applications, especially for workflows and service compositions. Based on this model, a new dynamic separation of duty constraint, namely task-based dynamic separation of duty constraint,was formally defined and compared with traditional dynamic separation of duty constraints using a typical example. The new constraint can specify access control related system runtime context more accurately. It can increase the efficiency of access control at runtime.

     

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