基于极化码的连续变量量子密钥分发多维逆向协商协议

doi:10.3969/j.issn.1007-5461.2021.04.008

量子电子学报 ›› 2021, Vol. 38 ›› Issue (4): 460-467.doi: 10.3969/j.issn.1007-5461.2021.04.008

基于极化码的连续变量量子密钥分发多维逆向协商协议

周文婷1, 王鑫1, 卞宇翔2,3∗, 乔涵1, 冯宝2,3

( 1 国网新疆电力有限公司信息通信公司, 新疆乌鲁木齐 830000; 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 211000; 3 南京南瑞国盾量子技术有限公司, 江苏南京 211000 )

收稿日期:2020-05-07 修回日期:2020-06-08 出版日期:2021-07-28 发布日期:2021-07-27
通讯作者: E-mail: 583640212@qq.com
作者简介:周文婷( 1974 - ), 女, 硕士, 高级工程师, 主要从事量子密码算法, 量子保密通信技术等方面的研究。 E-mail: 18762557853@163.com
基金资助:
Supported by State Grid Xinjiang Electric Power Co., Ltd. Information and Communication Corporation Technology Project (国网新疆电力有限公司信息通信公司科技项目, SGXJXT00JFJS2000097)

Multidimensional reverse negotiation protocol for continuous variable quantum key distribution based on polar code

ZHOU Wenting1, WANG Xin1, BIAN Yuxiang2,3∗, QIAO Han1, FENG Bao2,3

( 1 Information and Communication Company of State Grid Xinjiang Electric Power Co., Ltd, Urumqi 830000, China; 2 NARI Group Corporation (State Grid Electric Power Research Institute), Nanjing 211106, China; 3 NRGD Quantum Technology Co., Ltd., Nanjing 211106, China )

Received:2020-05-07 Revised:2020-06-08 Published:2021-07-28 Online:2021-07-27

摘要/Abstract

摘要： 连续变量量子密钥分发 (CV-QKD) 协议的一个重要组成部分是数据协商。在连续变量量子密钥分发的多维协商协议中引入了极化码, 提出了两种不同的基于极化码的多维协商协议。该协议包含多维协商和极化码纠错两个组成模块。利用多维协商模块可将原始长密钥分为多个 d 维向量组, 每组向量经过归一化、球面化和旋转处理变为二进制密钥串。而利用极化码纠错模块, 通信双方可共同分享冻结位置信息和冻结比特值, 实现基于极化码的逆向数据协商。该协议的可行性通过数值仿真得到了证明, 与现有的极化码逆向协商协议相比, 该协议可以在纠错成功率保持不变的条件下获得更高的协商效率。

关键词: 量子通信, 量子密钥分发, 连续变量, 多维协商, 极化码, 逆向协商, 协商效率

Abstract: Information reconciliation is an important part of a continuous-variable quantum key distribu- tion (CV-QKD) system. Polar code is applied to multidimensional reconciliation protocols for CV-QKD, and two new polar code multidimensional reconciliation protocols are proposed in this work. The new protocol consists of the multidimensional algorithm part and error correction part. In the first part, the long sifted key can be divided into a set of d-dimension vectors, and then each group of vectors can be transformed to a binary data after normalization, spheroidization and rotation. In the second part, thecommunication parties can share the frozen position information and frozen bit value, and realize the reverse information reconciliation based on the polar code. The simulation results show that compared with the original inverse polar code reconciliation protocol, the proposed protocol can achieve higher negotiation efficiency while the error correction success rate remains unchanged.

Key words: quantum communication, quantum key distribution, continuous variable, multidimensional reconciliation, polar code, inverse reconciliation, reconciliation efficiency

中图分类号:

TN918

周文婷, 王鑫, 卞宇翔, ∗, 乔涵, 冯宝, . 基于极化码的连续变量量子密钥分发多维逆向协商协议[J]. 量子电子学报, 2021, 38(4): 460-467.

ZHOU Wenting, WANG Xin, BIAN Yuxiang, ∗, QIAO Han, FENG Bao, . Multidimensional reverse negotiation protocol for continuous variable quantum key distribution based on polar code[J]. Chinese Journal of Quantum Electronics, 2021, 38(4): 460-467.

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基于极化码的连续变量量子密钥分发多维逆向协商协议

Multidimensional reverse negotiation protocol for continuous variable quantum key distribution based on polar code

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