Abstract. We present a modelling language, called X-Policy, for webbased collaborative systems with dynamic access control policies. The access to resources in these systems depend...
Implementing access control efficiently and effectively in an open and distributed system is a challenging problem. One reason for this is that users requesting access to remote re...
Abstract In this article, we present a comprehensive approach for privacy preserving access control based on the notion of purpose. In our model, purpose information associated wit...
Role-Based Access Control (RBAC) models have emerged as a leading access control approach for today’s information systems. Hybrid role hierarchies introduced in the Generalized ...
A significant deterrent to the ability to connect in a spontaneous manner in cross-enterprise collaborative applications is the difficulty in users from different domains being ab...