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Chinese Physics, 2007, Vol. 16(5): 1364-1369    DOI: 10.1088/1009-1963/16/5/033
CLASSICAL AREAS OF PHENOMENOLOGY Prev   Next  

Security analysis of continuous-variable quantum key distribution scheme

Zhu Jun(朱俊), He Guang-Qiang(何广强), and Zeng Gui-Hua(曾贵华)
The State Key Laboratory on Fiber-Optic Local Area Networks and Advanced Optical Communication Systems, Electronic Engineering Department, Shanghai Jiaotong University, Shanghai 200240, China
Abstract  In this paper security of the quantum key distribution scheme using correlations of continuous variable Einstein--Podolsky--Rosen (EPR) pairs is investigated. A new approach for calculating the secret information rate $\Delta I$ is proposed by using the Shannon information theory. Employing an available parameter F which is associated with the entanglement of the EPR pairs, one can detect easily the eavesdropping. Results show that the proposed scheme is secure against individual beam splitter attack strategy with a proper squeeze parameter.
Keywords:  continuous variable EPR entanglement pairs      quantum key distribution      Shannon information theory      security analysis  
Received:  26 July 2006      Revised:  27 October 2006      Accepted manuscript online: 
PACS:  03.67.Dd (Quantum cryptography and communication security)  
  03.65.Ud (Entanglement and quantum nonlocality)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No 60472018).

Cite this article: 

Zhu Jun(朱俊), He Guang-Qiang(何广强), and Zeng Gui-Hua(曾贵华) Security analysis of continuous-variable quantum key distribution scheme 2007 Chinese Physics 16 1364

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