连续变量测量设备无关的量子直接通信  

Continuous Variable Measurement Device-independent Quantum Direct Communication

作　　者：王磊 柴庚 曹正文[1] WANG Lei;CHAI Geng;CAO Zhengwen

机构地区：[1]西北大学信息科学与技术学院,西安710127

出　　处：《科技创新与应用》2024年第36期7-12,共6页Technology Innovation and Application

基　　金：国家自然科学基金(62071381,62301430);2023年度陕西数理基础科学研究项目(23JSY014);陕西省教育厅科研计划项目(自然科学专项)(23JK0680);西安市科学技术协会青年人才托举计划项目(959202313011);西北大学2024年研究生科研创新项目(CX2024200)。

摘　　要：经典通信的安全性依赖于加密技术,并且密钥的私密性决定了通信的安全性,但这种安全性会受到计算能力爆发性增长的威胁。在量子密码学领域,量子安全直接通信提供一种新的通信模式,能够将秘密信息调制在量子态上并在量子信道中直接传输,其安全性由量子物理机制所保障。利用连续变量量子态构建的量子安全直接通信方案与现有电信网络高度兼容,并在安全距离内能提供更高的通信速率。针对实际应用中测量设备的非完美性易受到窃听者攻击的问题,该文提出一种基于纠缠交换的连续变量测量设备无关量子安全直接通信协议,并对其安全性进行分析。同时,基于协议的对称性,设计出适用于双向通信的量子对话协议。The security of classic communications relies on encryption technology,and the privacy of the key determines the security of communications,but this security is threatened by the explosive growth of computing power.In the field of quantum cryptography,quantum secure direct communication provides a new communication mode that can modulate secret information on quantum states and directly transmit it in quantum channels.Its security is guaranteed by quantum physical mechanisms.The quantumsecure direct communication scheme built using continuous-variable quantum states is highly compatible with existing telecommunications networks and can provide higher communication rates within safe distances.Aiming at the problem that the imperfection of measurement devices is vulnerable to eavesdroppers in practical applications,this paper proposes a continuous variable measurement-device-independent quantum secure direct communication protocol based on entanglement switching,and analyzes its security.At the same time,based on the symmetry of the protocol,a quantum dialogue protocol suitable for two-way communication is designed.

关 键 词：连续变量 量子安全直接通信 测量设备无关 纠缠交换 量子对话 

分 类 号：TN918.1[电子电信—通信与信息系统]