Abstract
Quantum digital signature (QDS) provides an effective method to guarantee the information-theoretical security of signature messages. Here, we propose a scheme of implementing QDS with configurable decoy states. In this scheme, the legitimate parties configure the number of decoy states to maximize the signature rate and/or simplify the experimental operation in practical scenarios. Considering different optical intrinsic errors, we investigate the performance of a typical QDS system in one and two decoy-state cases and give the corresponding guide to configure decoy states, which we expect would be valuable for researchers to design QDS systems.
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Acknowledgements
This work was supported by the National Key Research and Development Program of China under Grants 2018YFA0306400, 2017YFA0304100, the National Natural Science Foundation of China under Grants 11847215, 61705110, 11774180, the China Postdoctoral Science Foundation under Grants 2019T120446, 2018M642281, the Natural Science Foundation of Jiangsu Province under Grant BK20170902, and the Jiangsu Planned Projects for Postdoctoral Research Funds under Grant 2018K185C.
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Zhang, CM., Zhu, Y., Chen, JJ. et al. Practical quantum digital signature with configurable decoy states. Quantum Inf Process 19, 151 (2020). https://doi.org/10.1007/s11128-020-02648-y
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DOI: https://doi.org/10.1007/s11128-020-02648-y