中国物理B ›› 2019, Vol. 28 ›› Issue (9): 90301-090301.doi: 10.1088/1674-1056/ab343c

• GENERAL • 上一篇    下一篇

Attacking a high-dimensional quantum key distribution system with wavelength-dependent beam splitter

Ge-Hai Du(杜舸海), Hong-Wei Li(李宏伟), Yang Wang(汪洋), Wan-Su Bao(鲍皖苏)   

  1. 1 Henan Key Laboratory of Quantum Information and Cryptography, PLA SSF IEU, Zhengzhou 450001, China;
    2 Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
  • 收稿日期:2019-05-16 修回日期:2019-06-18 出版日期:2019-09-05 发布日期:2019-09-05
  • 通讯作者: Hong-Wei Li, Hong-Wei Li E-mail:lihow@ustc.edu.cn;bws@qiclab.cn
  • 基金资助:

    Project supported by the National Key Research and Development Program of China (Grant No. 2016YFA0302600) and the National Natural Science Foundation of China (Grant No. 61675235).

Attacking a high-dimensional quantum key distribution system with wavelength-dependent beam splitter

Ge-Hai Du(杜舸海)1,2, Hong-Wei Li(李宏伟)1,2, Yang Wang(汪洋)1,2, Wan-Su Bao(鲍皖苏)1,2   

  1. 1 Henan Key Laboratory of Quantum Information and Cryptography, PLA SSF IEU, Zhengzhou 450001, China;
    2 Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
  • Received:2019-05-16 Revised:2019-06-18 Online:2019-09-05 Published:2019-09-05
  • Contact: Hong-Wei Li, Hong-Wei Li E-mail:lihow@ustc.edu.cn;bws@qiclab.cn
  • Supported by:

    Project supported by the National Key Research and Development Program of China (Grant No. 2016YFA0302600) and the National Natural Science Foundation of China (Grant No. 61675235).

摘要:

The unconditional security of quantum key distribution (QKD) can be guaranteed by the nature of quantum physics. Compared with the traditional two-dimensional BB84 QKD protocol, high-dimensional quantum key distribution (HD-QKD) can be applied to generate much more secret key. Nonetheless, practical imperfections in realistic systems can be exploited by the third party to eavesdrop the secret key. The practical beam splitter has a correlation with wavelength, where different wavelengths have different coupling ratios. Using this property, we propose a wavelength-dependent attack towards time-bin high-dimensional QKD system. What is more, we demonstrate that this attacking protocol can be applied to arbitrary d-dimensional QKD system, and higher-dimensional QKD system is more vulnerable to this attacking strategy.

关键词: high-dimensional quantum key distribution, beam splitter, wavelength attack

Abstract:

The unconditional security of quantum key distribution (QKD) can be guaranteed by the nature of quantum physics. Compared with the traditional two-dimensional BB84 QKD protocol, high-dimensional quantum key distribution (HD-QKD) can be applied to generate much more secret key. Nonetheless, practical imperfections in realistic systems can be exploited by the third party to eavesdrop the secret key. The practical beam splitter has a correlation with wavelength, where different wavelengths have different coupling ratios. Using this property, we propose a wavelength-dependent attack towards time-bin high-dimensional QKD system. What is more, we demonstrate that this attacking protocol can be applied to arbitrary d-dimensional QKD system, and higher-dimensional QKD system is more vulnerable to this attacking strategy.

Key words: high-dimensional quantum key distribution, beam splitter, wavelength attack

中图分类号:  (Quantum cryptography and communication security)

  • 03.67.Dd
03.67.Hk (Quantum communication)