An efficient quantum secure direct communication scheme with authentication
Yang Yu-Guang(杨宇光)a)b), Wen Qiao-Yan(温巧燕)c) , and Zhu Fu-Chen(朱甫臣)d)
a School of Computer Science and Technology, Beijing University of Technology, Beijing 100022, China; b State Key Laboratory of Information Security (Graduate School of Chinese Academy of Sciences), Beijing 100022, China; c School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China; d National Key Laboratory for Modern Communications, Chengdu 610041, China
Abstract In this paper an efficient quantum secure direct communication (QSDC) scheme with authentication is presented, which is based on quantum entanglement and polarized single photons. The present protocol uses Einstein--Podolsky--Rosen (EPR) pairs and polarized single photons in batches. A particle of the EPR pairs is retained in the sender's station, and the other is transmitted forth and back between the sender and the receiver, similar to the `ping--pong' QSDC protocol. According to the shared information beforehand, these two kinds of quantum states are mixed and then transmitted via a quantum channel. The EPR pairs are used to transmit secret messages and the polarized single photons used for authentication and eavesdropping check. Consequently, because of the dual contributions of the polarized single photons, no classical information is needed. The intrinsic efficiency and total efficiency are both 1 in this scheme as almost all of the instances are useful and each EPR pair can be used to carry two bits of information.
Received: 28 April 2006
Revised: 16 May 2006
Accepted manuscript online:
(Telecommunications: signal transmission and processing; communication satellites)
Fund: Project supported by the National High
Technology Research and Development Program of China (Grant
No~2006AA01Z419), the Major
Research plan of the National Natural Science Foundation of China
(Grant No~90604023), National Laboratory for Moderm Communica
Cite this article:
Yang Yu-Guang(杨宇光), Wen Qiao-Yan(温巧燕), and Zhu Fu-Chen(朱甫臣) An efficient quantum secure direct communication scheme with authentication 2007 Chinese Physics 16 1838
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