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Eavesdropping on practical QKD system based on six-state protocol

Tang Zhi-Lie Wei Zheng-Jun Chen Zhi-Xin Liu Jing-Feng Liang Rui-Sheng Li Ling-Yan Liao Chang-Jun Liu Song-Hao

Eavesdropping on practical QKD system based on six-state protocol

Tang Zhi-Lie, Wei Zheng-Jun, Chen Zhi-Xin, Liu Jing-Feng, Liang Rui-Sheng, Li Ling-Yan, Liao Chang-Jun, Liu Song-Hao
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  • Abstract views:  2726
  • PDF Downloads:  785
  • Cited By: 0
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  • Received Date:  22 October 2003
  • Accepted Date:  07 July 2004
  • Published Online:  01 March 2005

Eavesdropping on practical QKD system based on six-state protocol

  • 1. (1)华南师范大学物理与电信工程学院,广州 510631; (2)华南师范大学信息光电子科技学院,广州 510631

Abstract: Based on practical implementations of quantum cryptography with the attenuated laser pulses as the signal source rather than single photon, as well as lossy channels, detection efficiency, dark count of singlephoton counter, and technological possibilities of a realistic eavesdropping, we discuss a combining eavesdropping strategy of Breidbart basis and beamsplitting, and give a bound on maximum disturbance for a given mean photon number and transmission length for which a secret key can be distilled.

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