Security analysis of continuous-variable quantum key distribution scheme |
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| Authors: | Zhu Jun He Guang-Qiang and Zeng Gui-Hua |
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| Affiliation: | The State Key Laboratory on Fiber-Optic Local Area Networks and Advanced Optical Communication Systems, Electronic Engineering Department, Shanghai Jiaotong University, Shanghai 200240, China |
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| 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 Δ 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. |
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| Keywords: | continuous variable EPR
entanglement pairs quantum key distribution Shannon information
theory security analysis |
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