基于后选择的连续变量量子密钥分发协议

doi:10.11930/j.issn.1004-9649.201811052

中国电力 ›› 2019, Vol. 52 ›› Issue (7): 6-10.DOI: 10.11930/j.issn.1004-9649.201811052

• 泛在电力物联网——先进信息与通信技术 • 上一篇下一篇

基于后选择的连续变量量子密钥分发协议

于浩¹, 冯宝^2,3, 潘子春¹, 卓文合¹, 李振伟¹

1. 国网安徽省电力有限公司信息通信分公司, 安徽合肥 230061;
2. 南瑞集团有限公司(国网电力科学研究院有限公司), 江苏南京 211106;
3. 南京南瑞国盾量子技术有限公司, 江苏南京 211106

收稿日期:2018-11-15 修回日期:2019-06-08 出版日期:2019-07-05 发布日期:2019-07-13
作者简介:于浩(1973-),男,高级工程师,从事量子保密通信技术、电力系统通信技术研究,E-mail:yuh2158@ah.sgcc.com.cn;冯宝(1984-),男,通信作者,高级工程师,从事量子保密通信技术、电力系统通信技术研究,E-mail:fengbao@sgepri.sgcc.com.cn
基金资助:
国网安徽省电力有限公司2018年创新项目（面向全业务安全提升的安徽电力量子密钥分发基础网络研究，B1120718003P）。

Continuous-Variable Quantum Key Distribution Protocol Based on Post-Selection

YU Hao¹, FENG Bao^2,3, PAN Zichun¹, ZHUO Wenhe¹, LI Zhenwei¹

1. Information and Communication Branch of State Grid Anhui Electric Power Co., Ltd., Hefei 230061, China;
2. NARI Group Corporation/State Grid Electric Power Research Institute, Nanjing 211106, China;
3. NRGD Quantum Technology Co., Ltd., Nanjing 211106, China

Received:2018-11-15 Revised:2019-06-08 Online:2019-07-05 Published:2019-07-13
Supported by:
This work is supported by State Grid Anhui Electric Power Co., Ltd. 2018 Innovation Project (Research on Anhui Electric Power Quantum Key Distribution Basic Network for Full Service Security Enhancement, No.B1120718003P).

摘要/Abstract

摘要： 连续变量量子密钥分发（CVQKD）是利用连续变化的物理量承载密钥的量子密钥分发协议，与电力系统普遍采用的离散变量量子密钥分发协议相比，其具有设备简单、探测效率高、兼容性好等优点，成为量子密钥分发的研究热点。然而，量子态在量子信道中的传输衰减严重限制CVQKD传输距离。提出了一种基于后选择方法的CVQKD协议，且不需要额外的单光子源。研究结果表明，该后选择方法中测量值越大的物理量被保留下的概率越高。该方法可以简化并降低连续量子密钥分发协议实现的成本，为探索出电力网络的量子保密通信方案提供研究思路。

关键词: 连续变量, 量子密钥分发协议, 无噪线性放大器, 权函数, 量子通信

Abstract: Compared with discrete-variable quantum key distribution (DVQKD) protocol that has been widely used in power system, the continuous-variable quantum key distribution (CVQKD), which uses continuous variables to perform QKD protocol, has such advantages as simple equipment, high detection efficiency and good compatibility, and has attracted wide attentions. However, the attenuation in the quantum state transmission heavily reduces the propagation distance of CVQKD. In the paper, we present a CVQKD protocol based on post-selection method, which need not any extra single photon source. The results show that the higher probability values are all reserved and amplified by the post selection window function. The proposed method can simplify the implementation of CVQKD and reduce its cost, and can also provide ideas for studying the quantum secure communication schemes in power network.

Key words: continuous-variable, quantum key distribution protocol, noiseless linear amplification, window function, quantum communication

中图分类号:

TM73
TN929.1

于浩, 冯宝, 潘子春, 卓文合, 李振伟. 基于后选择的连续变量量子密钥分发协议[J]. 中国电力, 2019, 52(7): 6-10.

YU Hao, FENG Bao, PAN Zichun, ZHUO Wenhe, LI Zhenwei. Continuous-Variable Quantum Key Distribution Protocol Based on Post-Selection[J]. Electric Power, 2019, 52(7): 6-10.

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基于后选择的连续变量量子密钥分发协议

Continuous-Variable Quantum Key Distribution Protocol Based on Post-Selection

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基于后选择的连续变量量子密钥分发协议

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