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Delayed error verification in quantum key distribution |
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| Authors: | Chun-Mei Zhang Xiao-Tian Song Patcharapong Treeviriyanupab Mo Li Chao Wang Hong-Wei Li Zhen-Qiang Yin Wei Chen Zheng-Fu Han |
| Institution: | 1. Key Laboratory of Quantum Information, CAS, University of Science and Technology of China, Hefei, 230026, China 2. Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, 230026, China 3. Department of Computer Science, Faculty of Science and Technology, Phranakhon Rajabhat University, Bangkok, 10220, Thailand |
| Abstract: | Quantum key distribution (QKD) provides an unconditional secure key generation method between two distant legitimate parties Alice and Bob based on the fundamental properties of quantum mechanics, in the presence of an eavesdropper Eve. Since key reconciliation cannot always assure that the reconciled keys between Alice and Bob are identical, error verification is an important step in QKD. In this paper, we propose a scheme of delayed error verification using extra keys gained by privacy amplification with an arbitrarily small failure probability. The proposed scheme simplifies the post-processing procedure in QKD, which can be applied in practical QKD systems. |
| Keywords: | Error verification Key reconciliation Privacy amplification Quantum key distribution（QKD） |
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