Delayed error verification in quantum key distribution  

作　　者：Chun-Mei Zhang Xiao-Tian Song Patcharapong Treeviriyanupab Mo Li Chao Wang Hong-Wei Li Zhen-Qiang Yin Wei Chen Zheng-Fu Han 

机构地区：[1]Key Laboratory of Quantum Information,CAS,University of Science and Technology of China [2]Synergetic Innovation Center of Quantum Information and Quantum Physics,University of Science and Technology of China [3]Department of Computer Science,Faculty of Science and Technology,Phranakhon Rajabhat University

出　　处：《Chinese Science Bulletin》2014年第23期2825-2828,共4页

基　　金：supported by the National Basic Research Program of China (2011CBA00200 and 2011CB921200);the National Natural Science Foundation of China (61101137,61201239,61205118,and 11304397)

摘　　要：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.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 postprocessing procedure in QKD, which can be applied in practical QKD systems.

关 键 词：量子密钥分配 误差检定 延迟 量子密钥分发 无条件安全 生成方法 量子力学 误差校验 

分 类 号：O413[理学—理论物理] TN918.1[理学—物理]