The Study in Role-Based Session with Spatial Character

In recent years, the research of role-based access control model has been emphasized.The Spatial Role-Based Access Control (SRBAC) model is the expansion of spatial character in RBAC96. SRBAC has more comprehensive, more specific description of the system´s security. Based on SRBAC, this paper focuses on the session character. Formal definition of SRBAC Model was put forward at first. And then, different sessions being probably lead to conflicts in the system was presented. Finally, in order to maintain the system´s consistency, the algorithms, which solve the state change problem of the sessions by the change of spatial lacation, were presented to eliminate the conflictive session and confirm a non-blocked sessions set at any spatial location.