This paper makes two main contributions towards establishing support for application-specific factors in middleware security mechanisms. First, it develops a simple classification...
We address the problem of privacy-preserving access control in distributed systems. Users commonly reveal more personal data than strictly necessary to be granted access to online...
We consider positive rules in which the conclusion may contain existentially quantified variables, which makes reasoning tasks (such as Deduction) undecidable. These rules have t...
A good object-oriented design does not necessarily make a good component-based design, and vice versa. What design principles do components introduce? This paper examines componen...
This paper focuses on ways and means of stimulating idea generation in collaborative situations involving designers, engineers, software developers, users and usability people. Pa...