We propose a new cryptographic primitive called oblivious signaturebased envelope (OSBE). Informally, an OSBE scheme enables a sender to send an envelope (encrypted message) to a ...
Role engineering, the task of defining roles and associating permissions to them, is essential to realize the full benefits of the role-based access control paradigm. Essentially,...
Using certificates for distributed authorizations in computer network systems has been discussed in the literature. However real implementations of the concept are rarely seen. In...
Abstract— Following Mark Weiser’s vision of ubiquitous computing and calm technology, computer systems should run in the background, preferably without the user noticing it at ...