Identity-based Universal Designated Verifier Signatures
The notion of Universal Designated Verifier Signatures (UDVS) was introduced in the seminal paper of Steinfeld et. al. in . In this paper, we firstly propose a model of identity-based (ID-based) UDVS schemes. We note that there are two methods to achieve an ID-based UDVS scheme. We provide two constructions of ID-based UDVS schemes based on bilinear pairings that use the two methods that we have identified. We provide our security proof based on the random oracle model.