E91-QKD 中集体攻击上限的研究

doi:10.3969/j.issn.1007-5461.2023.03.013

量子电子学报 ›› 2023, Vol. 40 ›› Issue (3): 407-414.doi: 10.3969/j.issn.1007-5461.2023.03.013

E91-QKD 中集体攻击上限的研究

贾玮 1, 张强强 1, 卞宇翔 1, 李威 2*

( 1 南京南瑞国盾量子技术有限公司, 江苏南京 211106; 2 南京邮电大学通信与信息工程学院, 江苏南京 210003 )

收稿日期:2021-08-23 修回日期:2023-02-25 出版日期:2023-05-28 发布日期:2023-05-28
通讯作者: E-mail: alfred_wl@njupt.edu.cn E-mail:E-mail: alfred_wl@njupt.edu.cn
作者简介:贾玮 ( 1988 - ), 安徽宿州人, 高级工程师, 主要从事电力系统通信技术、量子保密通信技术方面的研究。 E-mail: jiawei@sgepri.sgcc.com.cn
基金资助:
南京南瑞国盾量子技术有限公司科技项目(5246MI200002)

Research on the upper bound of collective attack in E91-QKD

JIA Wei 1 , ZHANG Qiangqiang1 , BIAN Yuxiang1 , LI Wei 2*

( 1 NRGD Quantum Technology Co., Ltd., Nanjing 211006, China; 2 College of Communication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China )

Received:2021-08-23 Revised:2023-02-25 Published:2023-05-28 Online:2023-05-28

摘要/Abstract

摘要： 安全性分析是实用化量子密钥分发 (QKD) 协议中不可或缺的一部分, 它不仅可以用来表征外界的窃听能力, 还可以为系统的密钥率提供安全的范围。量子通道攻击能力的表征是QKD安全性分析的主要内容, 其中集体攻击被认为是最强大的量子通道攻击之一。构造了由两体耦合作用和正定算子测度 (POVM) 构成的广义的集体攻击操作, 给出了E91-QKD相对于集体攻击的安全性分析。仿真结果显示, 在集体攻击下窃听者与通信方之间的互信息要小于基于纠缠纯化协议所提供的界限, 因此系统的密钥率和对误比特率的容忍度有了显著的提升。所提出的安全性分析将为实用化QKD的密钥率提升提供一个解决途径, 且该方法可与其他实验方法兼容。

关键词: 量子信息, 量子密码, E91量子密钥分发, 集体攻击, 两体耦合

Abstract: Security analysis is an indispensable part of practical quantum key distribution (QKD) protocol, which can not only evaluate the eavesdropping ability of external attacks, but also provide a security bound for the key rate of system. Quantum channel attack is the main content of QKD security analysis, among which collective attack is considered to be one of the most powerful quantum channel attacks. In this paper, a generalized collective attack operation, composed of generalized bipartite coupling and the optimal positive operator-valued measurement (POVM) is constructed, and a theoretical study on the security analysis of E91-QKD against collective attack is carried out. The simulation results show that under collective attack, the mutual information between the eavesdropper and the communicator is less than that proposed by the entanglement purification protocol, and the key rate and bit error rate tolerance have been significantly improved. The security analysis developed in this work provides a theoretical method to increase the key rate for practical QKDs, which can be compatible with other experimental methods.

Key words: quantum information, quantum encryption, E91-quantum key distribution, collective attack, bipartite coupling

中图分类号:

O431.2

贾玮 , 张强强 , 卞宇翔 , 李威 . E91-QKD 中集体攻击上限的研究[J]. 量子电子学报, 2023, 40(3): 407-414.

JIA Wei , ZHANG Qiangqiang , BIAN Yuxiang , LI Wei . Research on the upper bound of collective attack in E91-QKD[J]. Chinese Journal of Quantum Electronics, 2023, 40(3): 407-414.

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E91-QKD 中集体攻击上限的研究

Research on the upper bound of collective attack in E91-QKD

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