Purpose Authorization and access control have been a topic of research for several
decades. However, existing definitions are inconsistent and even contradicting each other …

Access control mechanisms define the level of access to the resources among specified
users. It distinguishes the users as authorized or unauthorized based on appropriate …

Access control is a security aspect whose requirements evolve with technology advances
and, at the same time, contemporary social contexts. Multitudes of access control models …

Access control is an indispensable security technology. However, it has been relatively
neglected by the research community. Over the past ten years, the doctrine of mandatory …

Access control is the process of controlling every request to a system and determining,
based on specified rules (authorizations), whether the request should be granted or denied …

Authorization and its enforcement, access control, have stood at the beginning of the art and
science of information security, and remain being crucial pillar of security in the information …

This paper presents a role-involved purpose-based access control (RPAC) model, where a
conditional purpose is defined as the intention of data accesses or usages under certain …

With the developments of mobile communication, networks and information technology,
many new information service patterns and dissemination modes emerge with some security …

Cloud computing is an emerging and highly attractive technology due to its inherent
efficiency, cost-effectiveness, flexibility, scalability and pay-per-use characteristics. But …

Attribute-based access control (ABAC) and role-based access control (RBAC) are currently
the two most popular access control models. Yet, they both have known limitations and offer …