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Chin. Phys. B, 2008, Vol. 17(4): 1263-1268    DOI: 10.1088/1674-1056/17/4/019
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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)
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
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.
Keywords:  quantum key distribution      two-mode squeezed states      optimal beam splitter attack  
Received:  01 June 2007      Revised:  19 November 2007      Accepted manuscript online: 
PACS:  03.67.Hk (Quantum communication)  
  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)  
Fund: 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

Cite this article: 

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) Security of quantum key distribution using two-mode squeezed states against optimal beam splitter attack 2008 Chin. Phys. B 17 1263

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