We introduce a formal semantics based calculus of trust that explicitly represents trust and quantifies the risk associated with trust in public key infrastructure (PKI) and iden...
We present the first group signature scheme with provable security and signature size O(λ) bits where the group manager, the group members, and the Open Authority (OA) are all id...
CardSpace (formerly known as InfoCard) is a Digital Identity Management system that has recently been adopted by Microsoft. In this paper we identify two security flaws in CardSp...
Computer based community support systems can provide powerful support in direct exchange of information and in finding people for information exchange Such applications usually mak...
The natural evolution of eGovernment is to go beyond the management of identities and therefore it is necessary to manage people, companies or organizations, and their capabilities...
Mario Reyes-Ayala, Ignacio Alamillo, Daniel Chavar...