Public-key quantum digital signature scheme with one-time pad private-key |
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Authors: | Feng-Lin Chen Wan-Fang Liu Su-Gen Chen Zhi-Hua Wang |
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Affiliation: | 1.School of Mathematics and Computation Science,AnQing Normal University,Anqing,China;2.School of Physics and Electric Engineering,AnQing Normal University,Anqing,China;3.School of Mathematical Sciences,University of Science and Technology of China,Hefei,China |
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Abstract: | A quantum digital signature scheme is firstly proposed based on public-key quantum cryptosystem. In the scheme, the verification public-key is derived from the signer’s identity information (such as e-mail) on the foundation of identity-based encryption, and the signature private-key is generated by one-time pad (OTP) protocol. The public-key and private-key pair belongs to classical bits, but the signature cipher belongs to quantum qubits. After the signer announces the public-key and generates the final quantum signature, each verifier can verify publicly whether the signature is valid or not with the public-key and quantum digital digest. Analysis results show that the proposed scheme satisfies non-repudiation and unforgeability. Information-theoretic security of the scheme is ensured by quantum indistinguishability mechanics and OTP protocol. Based on the public-key cryptosystem, the proposed scheme is easier to be realized compared with other quantum signature schemes under current technical conditions. |
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