Object-based programming is becoming more and more popular and is currently conquering the world of distributed programming models. In object-based systems access control is often...
Abstract. Most current object-based distributed systems support access control lists for access control. However, it is difficult to determine which principal information to use fo...
The ability to dynamically create and subsequently manage secure virtual organisations (VO) is one of the key challenges facing the Grid community. Existing approaches for establi...
Richard O. Sinnott, David W. Chadwick, Jos Koetsie...
We consider a set of views stating possibly conflicting facts. Negative facts in the views may come, e.g., from functional dependencies in the underlying database schema. We want ...