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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. 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 |
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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.
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Received: 27 March 2017
Revised: 14 June 2017
Accepted manuscript online:
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PACS:
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03.67.Dd
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(Quantum cryptography and communication security)
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03.65.Ud
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(Entanglement and quantum nonlocality)
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03.67.Hk
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(Quantum communication)
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| Fund: 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). |
Corresponding Authors:
Ying Guo
E-mail: yingguo@csu.edu.cn
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Cite this article:
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) Improving continuous-variable quantum key distribution under local oscillator intensity attack using entanglement in the middle 2017 Chin. Phys. B 26 100303
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