Administrative role-based access control (ARBAC) is the first comprehensive administrative model proposed for role-based access control (RBAC). ARBAC has several features for designing highly expressive policies, but current work has not highlighted the utility of these expressive policies. In this report, we present a case study of designing an ARBAC policy for a bank comprising 18 branches. U...

Institutional collaborative systems focus on providing the fast, and secure connections to students, teaching and non-teaching staff members. Access control is more important in these types of systems because different kind of users access the system on different levels. So a proper architecture must be there for these kinds of systems, for providing an efficient and secure system. As lot of wo...

Access control to resources is one of the most important technologies for supporting human activities in the digital space. To realize the control two schemes were proposed: RBAC (Role-Based Access Control) and TRBAC (Temporal Role-Based Access Control) by adding time constraints and role dependencies to RBAC. However, these methods are not effective for temporal activities such as visitor acce...

A two-key access control scheme is proposed for implementing the access control matrix. The proposed scheme is based on binary form of access rights and time stamp concept. In this scheme each user is assigned one key and each file is also assigned one key. The key of a user or file can be used to derive the access rights to the files depending on the value of time stamp number. The scheme achi...

Role-Based Access Control (RBAC) is increasingly used for ensuring security and privacy in complex organizations such as healthcare institutions. In RBAC, access permissions are granted to an individual based on her defined roles. Much work has been done on the specification of RBAC models for enforcing access control; however, in order to arrive at appropriate choices of access control for par...