A scheme for ensuring access rights untransferability in a client-serverecenario with a central authority and where servers hold no access information about clients is presented in...
This paper presents a model for delegation based on partial orders, proposing the subclass relation in OWL as a way to represent the partial orders. Delegation and authorization de...
We show that homomorphic evaluation of (wide enough) arithmetic circuits can be accomplished with only polylogarithmic overhead. Namely, we present a construction of fully homomorp...
This paper presents a learning object broker that aims to mediate and control accesses to learning objects offered by the “Learning Resource Exchange”. This broker provides a u...
This short paper presents a methodological framework for commentaries from various sources on the same texts allowing them to be assembeled in an intelligent and coherent way. Cat...