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Research Online is the open access institutional repository for the University of Wollongong. For further information contact the UOW (2005). Identity-based ring signcryption schemes: cryptographic primitives for preserving privacy and authenticity in the ubiquitous world. Abstract In this paper, we present a new concept called an identity based ring(More)
A proxy signature scheme allows an entity to delegate its signing capability to another entity (proxy) in such a way that the proxy can sign messages on behalf of the delegator. Proxy signatures have found numerous practical applications such as distributed systems, mobile agent applications, etc. Recently, Xu, Zhang and Feng proposed the first formal(More)