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Improvement and security analysis of multi-ring discrete modulation continuous variable quantum secret sharing scheme |
| Huan-Yao Jiang(姜欢窈)1,†, Min Nie(聂敏)1, Guang Yang(杨光)1, Ai-Jing Sun(孙爱晶)1, Mei-Ling Zhang(张美玲)1, and Chang-Xing Pei(裴昌幸)2 |
1 School of Communications and Information Engineering & School of Artificial Intelligence, Xi'an University of Posts and Telecommunications, Xi'an 710121, China;
2 State Key Laboratory of Integrated Service Networks, Xidian University, Xi'an 710071, China |
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Abstract In order to avoid the complexity of Gaussian modulation and the problem that the traditional point-to-point communication DM-CVQKD protocol cannot meet the demand for multi-user key sharing at the same time, we propose a multi-ring discrete modulation continuous variable quantum key sharing scheme (MR-DM-CVQSS). In this paper, we primarily compare single-ring and multi-ring M-symbol amplitude and phase-shift keying modulations. We analyze their asymptotic key rates against collective attacks and consider the security key rates under finite-size effects. Leveraging the characteristics of discrete modulation, we improve the quantum secret sharing scheme. Non-dealer participants only require simple phase shifters to complete quantum secret sharing. We also provide the general design of the MR-DM-CVQSS protocol. We conduct a comprehensive analysis of the improved protocol's performance, confirming that the enhancement through multi-ring M-PSK allows for longer-distance quantum key distribution. Additionally, it reduces the deployment complexity of the system, thereby increasing the practical value.
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Received: 26 December 2023
Revised: 29 February 2024
Accepted manuscript online: 07 April 2024
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PACS:
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03.67.Hk
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(Quantum communication)
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03.67.Dd
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(Quantum cryptography and communication security)
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03.67.-a
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(Quantum information)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61971348 and 61201194). |
Corresponding Authors:
Huan-Yao Jiang
E-mail: 1134319164@qq.com
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Cite this article:
Huan-Yao Jiang(姜欢窈), Min Nie(聂敏), Guang Yang(杨光), Ai-Jing Sun(孙爱晶), Mei-Ling Zhang(张美玲), and Chang-Xing Pei(裴昌幸) Improvement and security analysis of multi-ring discrete modulation continuous variable quantum secret sharing scheme 2024 Chin. Phys. B 33 070303
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