In ProvSec 2008, Wu et al. constructed two server-aided verification signature (SAV-) schemes based on BLS signature. In this paper, we provide a new definition of the security of...
Undeniable signatures were proposed to limit the public verification property of ordinary digital signature. In fact, the verification of such signatures cannot be obtained withou...
Multimedia documents are increasingly used which involve to develop model to that kind of data. In this paper we present a multimedia model which combines textual and visual inform...