earticle

영어

Designated verifier signature (DVS) allows the signer to convince a verifier the validity of a statement but prevent the verifier from transferring the conviction. Strong designated verifier signature (SDVS) is a variant of DVS, which could make it possible for a signer to convince only the designated verifier that the signature is made by the signer. Recently, many strong designated verifier signature schemes have been presented in identity based setting. Unfortunately, most of them can not satisfy the strongness and non-delegatability properties, and cannot be rigorously proved secure. Moreover, for some special applications, these schemes suffer from larger data size of communication. In this paper, we present an efficient identity-based strong designated verifier signature scheme with message recovery, and then rigorously analyze its security properties in the random oracle model. As far as we know, it is the first provably secure identity-based strong designated verifier signature scheme with message recovery, which can be used to sign an arbitrary long message, and can satisfy all the security properties including the existential unforgeability, strongness property, non-transferability and non-delegatability, etc.