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Improving continuous-variable quantum key distribution under local oscillator intensity attack using entanglement in the middle |
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| Affiliation: | 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 |
| 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. |
| Keywords: | continuous-variable quantum key distribution local oscillator intensity attack entanglement in the middle |
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