: We report about ongoing research in a virtual reality environment where visitors can interact with agents that help them to obtain information, to peform certain transactions and...
For the two last decades, electronic authentication has been an important topic. The first applications were digital signatures to mimic handwritten signatures for digital document...
We study properties of rough sets, that is, approximations to sets of records in a database or, more formally, to subsets of the universe of an information system. A rough set is a...
The underlying belief and knowledge models assumed by various kinds of authentication protocols have been studied for well over 10 years now. On the other hand, the related questio...
Spatial data mining, i.e., discovery of interesting, implicit knowledge in spatial databases, is an important task for understanding and use of spatial data- and knowledge-bases. I...