面向城域接入的连续变量量子密钥分发技术  

Continuous-variable quantum key distribution for metropolitan and access networks

作　　者：张一辰 边一铭 王恒 喻松 徐兵杰 郭弘 ZHANG Yichen;BIAN Yiming;WANG Heng;YU Song;XU Bingjie;GUO Hong(School of Electronic Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China;Institute of Southwestern Communication,Chengdu 610041,China;School of Electronics,Peking University,Beijing 100871,China)

机构地区：[1]北京邮电大学电子工程学院,北京100876 [2]西南通信研究所,成都610041 [3]北京大学电子学院,北京100871

出　　处：《信息通信技术与政策》2023年第7期53-59,共7页Information and Communications Technology and Policy

基　　金：国家自然科学基金重点项目(No.61531003);国家自然科学基金青年科学基金项目(No.62001044,No.62101516);国家自然科学基金联合基金重点项目(No.U19A2076)。

摘　　要：相干态连续变量量子密钥分发技术是量子保密通信的重要手段,其通过制备、传输和测量高斯调制或离散调制的相干态来实现具有理论无条件安全性的密钥提取,具有与经典光通信产业兼容性高、中短传输距离下安全码率高、可支持点对多点密钥分发等优势,适合在城域和接入网中大规模部署。调研综述了连续变量量子密钥分发技术的协议、安全性理论、系统化与网络化发展现状,针对城域网和接入网应用场景下的连续变量量子密钥分发关键技术进行了梳理,并对连续变量量子密钥分发技术未来发展趋势进行了展望。Continuous-variable quantum key distribution using coherent states is an important means of quantum secure communications.It usually realizes key distillation with theoretical unconditional security through the preparation,transmission and measurement of coherent states.It has the advantages of high compatibility with coherent optics communications,high secret key rate within metropolitan area,supporting point-to-multipoint key distribution,and is suitable for large-scale deployment in metropolitan and access networks.This perspective article reviews the protocols,security theory,systematization,and networking development status of continuous-variable quantum key distribution,sorts out the key technologies used in the application scenarios of metropolitan and access networks,and looks forward to its future development trend.

关 键 词：量子保密通信 量子密钥分发 连续变量 城域接入距离 网络化 

分 类 号：TN929.11[电子电信—通信与信息系统]