Quantum Designated Multi- verifier Signature.

A quantum designated multi- verifier signature (QDMVS) scheme is proposed. In this scheme, the signer can simultaneously designate multiple verifiers to verify the validity of the signature; the signature’s validity can be verified if and only if all the designated verifiers involve in the verification process. Moreover, all the verifiers can work together to generate an indistinguishable signature from the signer, so any third party can not confirm whether the signer or all the verifiers signed the original message. Security analysis shows that our QDMVS scheme is resistant to various attacks. On top of that, our scheme does not need any trusted third party, quantum one- way functions (QOWF), or quantum state swapping tests (SWAP). Therefore, the proposed QDMVS scheme is more efficient than similar schemes. [ABSTRACT FROM AUTHOR]