量子密钥分发系统防死时间攻击方案研究  

Research on anti-dead time attack scheme for quantum key distribution system

作　　者：唐世彪 李志 郑伟军 张万生 高松 李亚麟 程节 蒋连军 TANG Shibiao;LI Zhi;ZHENG Weijun;ZHANG Wansheng;GAO Song;LI Yalin;CHENG Jie;JIANG Lianjun(Quantum CTek Co.,Ltd.,Hefei 230088,China;Zhejiang Huadian Equipment Testing Institute Co.Ltd,Hangzhou 310000,China;Jiaxing Power Supply Company,State Grid Zhejiang Electric Power Co.,Ltd.,Jiaxing 314000,China;Zhejiang QuantumCtek Power Technology Co.,Ltd.,Hangzhou 310007,China)

机构地区：[1]科大国盾量子技术股份有限公司,安徽合肥230088 [2]浙江华电器材检测研究院有限公司,杭州浙江310000 [3]国网浙江省电力有限公司嘉兴供电公司,浙江嘉兴314000 [4]浙江国盾量子电力科技有限公司,浙江杭州310007

出　　处：《量子电子学报》2023年第1期95-103,共9页Chinese Journal of Quantum Electronics

基　　金：安徽省科技重大专项资助(17030901013,202103a13010004)。

摘　　要：为进一步提升量子密钥分发(QKD)技术的实用性和安全性,挖掘QKD系统中可能存在的安全漏洞并研究相应的防御策略是该领域的一个重要研究方向。死时间攻击是一种针对具有多通道探测器的QKD系统的攻击方式,攻击者利用单光子雪崩光电二极管的死时间效应实现对指定通道的致盲以破坏QKD系统生成密钥的安全性。针对该类型攻击,提出了一种能够有效防范攻击的基于时间测量的动态死时间设置方案,该方案通过使用TDC时间测量技术确保多通道探测器能够同步进入与退出死时间状态从而实现防御目标。经试验平台验证,该方案具备可行性。In order to improve the practicability and security of quantum key distribution(QKD)technology,it is an important research direction in the field to explore the possible security vulnerabilities in QKD system and study the corresponding defense strategies.Dead time attack is a kind of attack against QKD system with multi-channel detectors,in which the attacker uses the death time effect of single-photon avalanche photodiode to blind the designated channel to destroy the security of the key generated by QKD system.Aiming at this type of attack,a new anti-dead time attack scheme based on time measurement technology to dynamically setting dead time length is proposed.The proposed scheme uses TDC time measurement technology to ensure that the multi-channel detectors can enter and exit the dead time state simultaneously to achieve the defense goal.The feasibility of the scheme is verified on the test platform.

关 键 词：量子通信 量子密钥分发 雪崩光电二极管 死时间攻击 时间数字转换器 现场可编程门阵列 

分 类 号：O431.2[机械工程—光学工程]