Universal Designated Multi Verifier Signature Schemes

The notion of universal designated-verifier signatures was put forth by Steinfeld et. al. in Asiacrypt 2003. This notion allows a signature holder to designate the signature to a desired designated-verifier. In this paper, we extend this notion to allow a signature holder to designate the signature to multi verifiers, and hence, we call our scheme as universal designated multi verifier signatures. We provide security proofs for our schemes based...