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Coherent attacking continuous-variable quantum key distribution with entanglement in the middle

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Abstract

We suggest an approach on the coherent attack of continuous-variable quantum key distribution (CVQKD) with an untrusted entangled source in the middle. The coherent attack strategy can be performed on the double links of quantum system, enabling the eavesdropper to steal more information from the proposed scheme using the entanglement correlation. Numeric simulation results show the improved performance of the attacked CVQKD system in terms of the derived secret key rate with the controllable parameters maximizing the stolen information.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 61379153, 61572529).

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Authors and Affiliations

  1. School of Information Science and Engineering, Central South University, Changsha, 410083, People’s Republic of China

    Zhaoyuan Zhang, Ronghua Shi & Ying Guo

  2. School of Engineering and Information Technology, University of New South Wales, Canberra, ACT, 2610, Australia

    Ying Guo

  3. State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, 200240, People’s Republic of China

    Guihua Zeng

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  1. Zhaoyuan Zhang
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  2. Ronghua Shi
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  3. Guihua Zeng
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  4. Ying Guo
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Correspondence to Ying Guo.

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Zhang, Z., Shi, R., Zeng, G. et al. Coherent attacking continuous-variable quantum key distribution with entanglement in the middle. Quantum Inf Process 17, 133 (2018). https://doi.org/10.1007/s11128-018-1903-0

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