CAACS: Context-Aware Access Control System for Physical Space in Smart Building

The existing entrance management system is difficult to use because it does not sufficiently use the access control model and contextual information. They are typically based on static model which are such as DAC and MAC. These models are known for not enforcing access control, which administrators desire. To mitigate this problem, exceptional policies must be configured in advance, which renders management difficult. Access control requirements depend on the target and context information around the target. We propose a whole access control system that comprises identification, authentication, authorization, and access decision. Based on attribute based access control model, we realize a context-aware access control system for the physical space. We conducted two case studies at a university. The first one shows how our model can be used. The second one switches the policies that are currently valid to enforce the contextaware access control. Consequently, CAACS would improve the usability of access control management and physical security in the building.