Efficient quantum secure communication with a publicly known key
Li Chun-Yan(李春燕)a)b)c), Li Xi-Han(李熙涵)a)b)c), Deng Fu-Guo(邓富国)a)d)†, 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; bInstitute of Low Energy Nuclear Physics, and Department of Material Science and Engineering, Beijing Normal University, Beijing 100875, China; c Beijing Radiation Center, Beijing 100875, China; d Department of Physics, Applied Optics Beijing Area Major Laboratory, Beijing Normal University, Beijing 100875, China
AbstractThis paper presents a simple way for an eavesdropper to eavesdrop freely the secret message in the experimental realization of quantum communication protocol proposed by Beige et al (2002 Acta Phys. Pol. A 101 357). Moreover, it introduces an efficient quantum secure communication protocol based on a publicly known key with decoy photons and two biased bases by modifying the original protocol. The total efficiency of this new protocol is double that of the original one. With a low noise quantum channel, this protocol can be used for transmitting a secret message. At present, this protocol is good for generating a private key efficiently.
Received: 23 November 2007
Revised: 24 December 2007
Accepted manuscript online:
PACS:
03.67.Dd
(Quantum cryptography and communication security)
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 10604008), Foundation
for the Author of National Excellent Doctoral Dissertation of China
(Grant No 200723), and Beijing Education Committee of China (Grant
No XK100270454).
Cite this article:
Li Chun-Yan(李春燕), Li Xi-Han(李熙涵), Deng Fu-Guo(邓富国), and Zhou Hong-Yu(周宏余) Efficient quantum secure communication with a publicly known key 2008 Chin. Phys. B 17 2352
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