Research on Temporal Extended Role Hierarchy

Role hierarchy is one component of the RBAC model. It can reduce the workload of permission assignment. Nowadays, most research on RBAC cannot deal with temporal constraints. The main purpose of this chapter is to study the effect of temporal constraints acting on role hierarchy. We first propose an extended model to solve the inheritance granularity. Based on it, we add temporal constraints and propose a temporal extended role hierarchy model. We analyze the effect of time constraint on the transferring of different permission in different inheritance modes and the character of temporal extended role hierarchy model. Finally, we analyze the space and time efficiency of the model.

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