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Quantum Digital Signature with Continuous-Variable

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Abstract

This paper presents a new continuous-variable quantum digital signature (CV-QDS) protocol which is more compatible with proven optical telecommunication technology and photon detector. In many current CV-QDS protocols, both quantum signals and the local oscillator are created starting with the same laser, propagating through the channel. However, the local oscillator setup may cause security problems to CV-QDS protocol. Therefore, we propose to exploit the pilot-aided feedforward data recovery scheme to solve this obstacle. Based on the reference pulse measurement, receivers can estimate and compensate for the phase drift of the quantum signal while avoiding the necessity of the transmitted local oscillator. Security analysis indicates that the protocol proposed in this paper is resistant to repudiation attack and forgery attack.

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Acknowledgements

This work is supported by the Fundamental Research Funds for the Central Universities of Central South University (Grant No. 2021zzts0207, 2021zzts0202), the Hunan Provincial Innovation Foundation for Postgraduate (Grant No. CX20210250), and the National Natural Science Foundation of China (Grant No. 61872390).

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Authors and Affiliations

  1. School of Computer Science and Engineering, Central South University, Changsha, 410083, China

    Xu Deng, Wei Zhao, Ronghua Shi & Huilong Fan

  2. College of Electrical and Information Engineering, Hunan University, Changsha, 410082, China

    Chao Ding

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  1. Xu Deng
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  2. Wei Zhao
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  3. Ronghua Shi
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Correspondence to Chao Ding or Huilong Fan.

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Deng, X., Zhao, W., Shi, R. et al. Quantum Digital Signature with Continuous-Variable. Int J Theor Phys 61, 144 (2022). https://doi.org/10.1007/s10773-022-05132-8

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