中国物理B ›› 2008, Vol. 17 ›› Issue (4): 1263-1268.doi: 10.1088/1674-1056/17/4/019

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Security of quantum key distribution using two-mode squeezed states against optimal beam splitter attack

何广强, 朱思维, 郭红斌, 曾贵华   

  1. The State Key Laboratory on Fiber-Optic Local Area Networks and Advanced Optical Communication Systems, Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030, China
  • 收稿日期:2007-06-01 修回日期:2007-11-19 出版日期:2008-04-20 发布日期:2008-04-20
  • 基金资助:
    Project supported by the Shanghai Jiaotong University (SJTU) Young Teacher Foundation, China (Grant No A2831B), the SJTU Participating in Research Projects (PRPs), China (Grant No T03011030), and the National Natural Science Foundation of China (Grant No

Security of quantum key distribution using two-mode squeezed states against optimal beam splitter attack

He Guang-Qiang(何广强)†, Zhu Si-Wei(朱思维), Guo Hong-Bin(郭红斌), and Zeng Gui-Hua(曾贵华)   

  1. The State Key Laboratory on Fiber-Optic Local Area Networks and Advanced Optical Communication Systems, Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030, China
  • Received:2007-06-01 Revised:2007-11-19 Online:2008-04-20 Published:2008-04-20
  • Supported by:
    Project supported by the Shanghai Jiaotong University (SJTU) Young Teacher Foundation, China (Grant No A2831B), the SJTU Participating in Research Projects (PRPs), China (Grant No T03011030), and the National Natural Science Foundation of China (Grant No

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摘要： For the beam splitter attack strategy against quantum key distribution using two-mode squeezed states, the analytical expression of the optimal beam splitter parameter is provided in this paper by applying the Shannon information theory. The theoretical secret information rate after error correction and privacy amplification is given in terms of the squeezed parameter and channel parameters. The results show that the two-mode squeezed state quantum key distribution is secure against an optimal beam splitter attack.

Abstract: For the beam splitter attack strategy against quantum key distribution using two-mode squeezed states, the analytical expression of the optimal beam splitter parameter is provided in this paper by applying the Shannon information theory. The theoretical secret information rate after error correction and privacy amplification is given in terms of the squeezed parameter and channel parameters. The results show that the two-mode squeezed state quantum key distribution is secure against an optimal beam splitter attack.

Key words: quantum key distribution, two-mode squeezed states, optimal beam splitter attack

中图分类号:  (Quantum communication)

  • 03.67.Hk
03.67.Pp (Quantum error correction and other methods for protection against decoherence) 42.50.Dv (Quantum state engineering and measurements) 42.79.Fm (Reflectors, beam splitters, and deflectors)