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Governmental and business organizations use the standard authorization model─ Role-based access control (RBAC) ─ to specify and administer access policies for electronic resources. In RBAC-based applications, access is granted or denied based on users' credentials. However, the RBAC model lacks features that allow applications to determine access based on time and location, spatio-temporal information. This access requirement is important for a growing number of mobile applications. Researchersdoi:10.5281/zenodo.5112610 fatcat:z3v5jtuk4ve5fpxleioqj543uu