In this paper we propose a novel architecture and approach to provide accountability for Web communities that require a high-level of privacy. A two-layered privacy protection arc...
We present a web-based application that allows a user to, walk through, see, and interact with a fully threedimensional model of an old Mexican city. The city itself motivates thi...
In this paper we present our authorization framework that supports the dynamic set-up of Web service federations for sharing data within virtual federations. Building on previous w...
Fuzzy Description Logics (Fuzzy DLs) and fuzzy OWL have been proposed as languages able to represent and reason about imprecise and vague knowledge. Such extensions have gained con...
The reliable authentication of user attributes is an important prerequisite for the security of web based applications. Digital certificates are widely used for that purpose. How...