Quantum secure direct communication with quantum encryption based on pure entangled states
Li Xi-Han, Li Chun-Yan, Deng Fu-Guo, Zhou Ping, Liang Yu-Jie, Zhou Hong-Yu
The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University,Beijing 100875, China;Institute of Low Energy Nuclear Physics, and Department of Material Science and Engineering, Beijing Normal University,Beijing 100875, China;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
Published: 20 August 2007
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, Li Chun-Yan, Deng Fu-Guo, Zhou Ping, Liang Yu-Jie, Zhou Hong-Yu Quantum secure direct communication with quantum encryption based on pure entangled states 2007 Chin. Phys. 16 2149
