Measurement-device-independent quantum communication without encryption

作     者：Peng-Hao Niu Zeng-Rong Zhou Zai-Sheng Lin Yu-Bo Sheng Liu-Guo Yin Gui-Lu Long 

作者机构：state Key Laboratory of Low-dimensional Quantum PhysicsBeijing 100084.China Department of PhysicsTsinghua UniversityBeijing 100084China Collaborative Innovation Center of Quantum MatterBeijing 100084China Beijing Academy of Quantum Information SciencesBeijing 100193China Beijing National Research Center for Information Science and TechnologyBeUing 100084China School of Information and Technology.Tsinghua UniversityBeijing 100084China lnstiute of Quantum Information and TechnologyNanjing University of Posts and TelecommunicationsNanjing 210003China College of Telecommunications &Information EngineeringNanjing University of Posts and TelecommunicationsNanjing 210003China Key Laboratory of Broadband Wireless Communication and Sensor Network TechnologyNanjing University of Posts and TelecommunicationsMinistry of EducationNanjing 210003China 

出 版 物：《Science Bulletin》 (科学通报（英文版）)

年 卷 期：2018年第63卷第20期

页      面：1345-1350页

核心收录：

学科分类：07[理学] 08[工学] 

基　　金：supported by the National Basic Research Program of China(2017YFA0303700 and 2015CB921001) the National Natural Science Foundation of China(61726801,11474168 and 11474181) the Beijing Advanced Innovation Center for Future Chip(ICFC) 

主　　题：Quantum secure direct communication Measurement-device-independent Quantum dialogue Encryption Cryptography 

摘      要：Security in communication is vital in modern life. At present, security is realized by an encryption process in cryptography. It is unbelievable if a secure communication is achievable without encryption. In quantum cryptography, there is a unique form of quantum communication, quantum secure direct communication, where secret information is transmitted directly over a quantum channel. Quantum secure direct communication is drastically distinct from our conventional concept of secure communication, because it does not require key distribution, key storage and ciphertext transmission, and eliminates the encryption procedure completely. Hence it avoids in principle all the security loopholes associated with key and ciphertext in traditional secure communications. For practical implementation, defects always exist in real devices and it may downgrade the security. Among the various device imperfections, those with the measurement devices are the most prominent and serious ones. Here we report a measurementdevice-independent quantum secure direct communication protocol using Einstein-Podolsky-Rosen pairs. This protocol eradicates the security vulnerabilities associated with the measurement device,and greatly enhances the practical security of quantum secure direct communication. In addition to the security advantage, this protocol has an extended communication distance, and a high communication capacity.