An ID-based Designated-Verifier Proxy Multi-signature Scheme

Designated verifier signature is a new cryptographic primitive, in a designated verifier signature scheme, only the designated verifier specified by the signer can verify the validity of the signature. In this paper, we propose an ID-based designated verifier proxy multi-signature scheme by combining the proxy multi-signature and the designated verifier signature. In our scheme, the designated verifier can verify the proxy-multi signature generated by the proxy signer on behalf of the group of original signers. Analysis shows that our scheme is secure and it is suitable for the practice in electronic world.