中国物理B ›› 2017, Vol. 26 ›› Issue (10): 100303-100303.doi: 10.1088/1674-1056/26/10/100303

• GENERAL • 上一篇    下一篇

Improving continuous-variable quantum key distribution under local oscillator intensity attack using entanglement in the middle

Fang-Li Yang(杨芳丽), Ying Guo(郭迎), Jin-Jing Shi(石金晶), Huan-Li Wang(王焕礼), Jin-Jin Pan(潘矜矜)   

  1. 1. College of Electronic Information and Automation, Guilin University of Aerospace Technology, Guilin 541000, China;
    2. School of Information Science and Engineering, Central South University, Changsha 410083, China;
    3. Guilin Public Works Section of High Speed Railway, Nanning Railway Bureau, Guilin 541000, China
  • 收稿日期:2017-03-27 修回日期:2017-06-14 出版日期:2017-10-05 发布日期:2017-10-05
  • 通讯作者: Ying Guo E-mail:yingguo@csu.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 61379153, 61401519, and 61572529), the Natural Science Foundation of Hunan Province, China (Grant No. 2017JJ3415), the Science and Technology Project of Guangxi Zhuang Autonomous Region, China (Grant Nos. AC16380094 and 1598008-29), and the Natural Science Fund of Guangxi Zhuang Autonomous Region, China (Grant No. 2015GXNSFAA139298).

Improving continuous-variable quantum key distribution under local oscillator intensity attack using entanglement in the middle

Fang-Li Yang(杨芳丽)1, Ying Guo(郭迎)2, Jin-Jing Shi(石金晶)2, Huan-Li Wang(王焕礼)3, Jin-Jin Pan(潘矜矜)1   

  1. 1. College of Electronic Information and Automation, Guilin University of Aerospace Technology, Guilin 541000, China;
    2. School of Information Science and Engineering, Central South University, Changsha 410083, China;
    3. Guilin Public Works Section of High Speed Railway, Nanning Railway Bureau, Guilin 541000, China
  • Received:2017-03-27 Revised:2017-06-14 Online:2017-10-05 Published:2017-10-05
  • Contact: Ying Guo E-mail:yingguo@csu.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 61379153, 61401519, and 61572529), the Natural Science Foundation of Hunan Province, China (Grant No. 2017JJ3415), the Science and Technology Project of Guangxi Zhuang Autonomous Region, China (Grant Nos. AC16380094 and 1598008-29), and the Natural Science Fund of Guangxi Zhuang Autonomous Region, China (Grant No. 2015GXNSFAA139298).

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摘要：

A modified continuous-variable quantum key distribution (CVQKD) protocol is proposed by originating the entangled source from a malicious third party Eve in the middle instead of generating it from the trustworthy Alice or Bob. This method is able to enhance the efficiency of the CVQKD scheme attacked by local oscillator (LO) intensity attack in terms of the generated secret key rate in quantum communication. The other indication of the improvement is that the maximum transmission distance and the maximum loss tolerance can be increased significantly, especially for CVQKD schemes based on homodyne detection.

关键词: continuous-variable, quantum key distribution, local oscillator intensity attack, entanglement in the middle

Abstract:

A modified continuous-variable quantum key distribution (CVQKD) protocol is proposed by originating the entangled source from a malicious third party Eve in the middle instead of generating it from the trustworthy Alice or Bob. This method is able to enhance the efficiency of the CVQKD scheme attacked by local oscillator (LO) intensity attack in terms of the generated secret key rate in quantum communication. The other indication of the improvement is that the maximum transmission distance and the maximum loss tolerance can be increased significantly, especially for CVQKD schemes based on homodyne detection.

Key words: continuous-variable, quantum key distribution, local oscillator intensity attack, entanglement in the middle

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

  • 03.67.Dd
03.65.Ud (Entanglement and quantum nonlocality) 03.67.Hk (Quantum communication)