Quantum secure direct communication with quantum encryption based on pure entangled states
Li Xi-Han(李熙涵)a)b)c), Li Chun-Yan(李春燕)a)b)c), Deng Fu-Guo(邓富国)a)b)c)†, Zhou Ping(周萍)a)b)c), Liang Yu-Jie(梁玉洁)a)b)c), and Zhou Hong-Yu(周宏余)a)b)c)
a The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875, China; b Institute of Low Energy Nuclear Physics, and Department of Material Science and Engineering, Beijing Normal University, Beijing 100875, Chinac Beijing Radiation Center, Beijing 100875, China
Abstract This paper presents a scheme for quantum secure direct communication with quantum encryption. The two authorized users use repeatedly a sequence of the pure entangled pairs (quantum key) shared for encrypting and decrypting the secret message carried by the travelling photons directly. For checking eavesdropping, the two parties perform the single-photon measurements on some decoy particles before each round. This scheme has the advantage that the pure entangled quantum signal source is feasible at present and any eavesdropper cannot steal the message.
Received: 07 November 2006
Revised: 21 November 2006
Accepted manuscript online:
Fund: Project supported
by the National Natural Science Foundation of
China (Grant Nos 10604008 and 10435020) and the Beijing Education
Committee (Grant No XK100270454).
Cite this article:
Li Xi-Han(李熙涵), Li Chun-Yan(李春燕), Deng Fu-Guo(邓富国), Zhou Ping(周萍), Liang Yu-Jie(梁玉洁), and Zhou Hong-Yu(周宏余) Quantum secure direct communication with quantum encryption based on pure entangled states 2007 Chinese Physics 16 2149
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