Implementation and security analysis of practical quantum secure direct communication

查看全文 作　　者：Ruoyang [1]Qi;Zhen [2]Sun;Zaisheng [2,3]Lin;Penghao [1]Niu;Wentao [2]Hao;Liyuan [4]Song;Qin [4]Huang;Jiancun [1]Gao;Liuguo [2,3]Yin;Gui-Lu [1,3,5,6]Long

机构地区：[1]State Key Laboratory of Low-imensional Quantum Physics and Department of Physics,Tsinghua University,Beijing 100084,China;[2]School of Information and Technology,Tsinghua University,Beijing 100084,China;[3]Beijing National Research Center for Information Science and Technology,Beijing 100084,China;[4]School of Electronic and Information Engineering,Beihang University,Beijing 100191,China;[5]Innovative Center of Quantum Matter,Beijing 100084,China;[6]Beijing Academy of Quantum Information Science,Beijing 100193,China

出　　处：《Light(Science & Applications)》索引2019年第8卷第1期,共8页

基　　金：supported by the National Basic Research Program of China under Grant Nos.2017YFA0303700 and 2015CB921001;the National Natural Science Foundation of China under Grant Nos.61727801,11474181,61871257,and 11774197;supported in part by the Beijing Advanced Innovation Center for Future Chip(ICFC). 摘　　要：Rapid development of supercomputers and the prospect of quantum computers are posing increasingly serious threats to the security of communication.Using the principles of quantum mechanics,quantum communication offers provable security of communication and is a promising solution to counter such threats.Quantum secure direct communication(QSDC)is one important branch of quantum communication.In contrast to other branches of quantum communication,it transmits secret information directly.Recently,remarkable progress has been made in proof-of-principle experimental demonstrations of QSDC.However,it remains a technical feat to bring QSDC into a practical application.Here,we report the implementation of a practical quantum secure communication system.The security is analyzed in the Wyner wiretap channel theory.The system uses a coding scheme of concatenation of lowdensity parity-check(LDPC)codes and works in a regime with a realistic environment of high noise and high loss.The present system operates with a repetition rate of 1 MHz at a distance of 1.5 kilometers.The secure communication rate is 50 bps,sufficient to effectively send text messages and reasonably sized files of images and sounds. 关键词：THEORY QUANTUM PROOF

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Implementation and security analysis of practical quantum secure direct communication

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