Quantum designated verifier signature without third party

Based on Bell states, a quantum designated verifier signature (QDVS) scheme without a third party is proposed. In this scheme, the signer and the designated verifier (DV) generate their private keys with the entangled system in the initial stage, then the signer performs quantum gate operations to generate the signature; lastly, the DV recovers the digest and verifies the signature with the corresponding quantum gate operations. Security analysis shows that our QDVS scheme has the property of the designated verifier signature. At the same time, it can resist various attacks. What is more, compared with the similar schemes without third party, our scheme has relatively lower cost, higher efficiency, and more security.

Automated summary

Based on Bell states, a quantum designated verifier signature (QDVS) scheme without a third party is proposed. The scheme utilizes entangled systems to generate private keys and quantum gate operations to generate and verify the signature. Security analysis shows that the QDVS scheme has the property of designated verifier signature and can resist various attacks. Compared with similar schemes without a third party, our scheme has lower cost, higher efficiency, and enhanced security.