中国物理B ›› 2007, Vol. 16 ›› Issue (2): 277-281.doi: 10.1088/1009-1963/16/2/001

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Eavesdropping on the `ping-pong' quantum communication protocol freely in a noise channel

李熙涵1, 李春燕1, 周萍1, 邓富国2, 周宏余2   

  1. (1)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; (2)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
  • 收稿日期:2006-05-15 修回日期:2006-06-14 出版日期:2007-02-20 发布日期:2007-02-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10604008) and the Beijing Education Committee (Grant No XK100270454).

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)   

  1. 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
  • Received:2006-05-15 Revised:2006-06-14 Online:2007-02-20 Published:2007-02-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10604008) and the Beijing Education Committee (Grant No XK100270454).

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摘要： We introduce an attack scheme for eavesdropping freely the ping-pong quantum communication protocol proposed by Bostr\"{o} 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.

关键词: quantum communication, ping-pong protocol, eavesdropping

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.

Key words: quantum communication, ping-pong protocol, eavesdropping

中图分类号:  (Quantum communication)

  • 03.67.Hk
42.50.Lc (Quantum fluctuations, quantum noise, and quantum jumps)