Eavesdropping on the `ping-pong' quantum communication protocol freely in a noise channel
Deng Fu-Guo(邓富国)a)b)c)†, Li Xi-Han(李熙涵)a)b), Li Chun-Yan(李春燕)a)b), Zhou Ping(周萍)a)b), 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, Chinab Institute 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
Abstract We introduce an attack scheme for eavesdropping freely the ping-pong quantum communication protocol proposed by Bostr?m and Felbinger [Phys. Rev. Lett.89, 187902 (2002)] in a noise channel. The vicious eavesdropper, Eve, intercepts and measures the travel photon transmitted between the sender and the receiver. Then she replaces the quantum signal with a multi-photon signal in the same state, and measures the returned photons with the measuring basis, with which Eve prepares the fake signal except for one photon. This attack increases neither the quantum channel losses nor the error rate in the sampling instances for eavesdropping check. It works for eavesdropping the secret message transmitted with the ping-pong protocol. Finally, we propose a way for improving the security of the ping-pong protocol.
Received: 15 May 2006
Revised: 14 June 2006
Accepted manuscript online:
(Quantum fluctuations, quantum noise, and quantum jumps)
Fund: Project supported by the
National Natural Science Foundation of China (Grant No 10604008)
and the
Beijing Education Committee (Grant No XK100270454).
Cite this article:
Deng Fu-Guo(邓富国), Li Xi-Han(李熙涵), Li Chun-Yan(李春燕), Zhou Ping(周萍), and Zhou Hong-Yu(周宏余) Eavesdropping on the `ping-pong' quantum communication protocol freely in a noise channel 2007 Chinese Physics 16 277
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