中国物理B ›› 2015, Vol. 24 ›› Issue (1): 10302-010302.doi: 10.1088/1674-1056/24/1/010302

• GENERAL • 上一篇    下一篇

Efficient error estimation in quantum key distribution

李默a b, Patcharapong Treeviriyanupabc, 张春梅a b, 银振强a b, 陈巍a b, 韩正甫a b   

  1. a Key Laboratory of Quantum Information, Chinese Academy of Sciences, University of Science and Technology of China, Hefei 230026, China;
    b Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026, China;
    c Department of Computer Science, Faculty of Science and Technology, Phranakhon Rajabhat University, Bangkok, Thailand
  • 收稿日期:2014-02-24 修回日期:2014-07-25 出版日期:2015-01-05 发布日期:2015-01-05
  • 基金资助:

    Project supported by the National Basic Research Program of China (Grant Nos. 2011CBA00200 and 2011CB921200) and the National Natural Science Foundation of China (Grant Nos. 61101137, 61201239, and 61205118).

Efficient error estimation in quantum key distribution

Li Mo (李默)a b, Patcharapong Treeviriyanupabc, Zhang Chun-Mei (张春梅)a b, Yin Zhen-Qiang (银振强)a b, Chen Wei (陈巍)a b, Han Zheng-Fu (韩正甫)a b   

  1. a Key Laboratory of Quantum Information, Chinese Academy of Sciences, University of Science and Technology of China, Hefei 230026, China;
    b Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026, China;
    c Department of Computer Science, Faculty of Science and Technology, Phranakhon Rajabhat University, Bangkok, Thailand
  • Received:2014-02-24 Revised:2014-07-25 Online:2015-01-05 Published:2015-01-05
  • Contact: Yin Zhen-Qiang, Chen Wei E-mail:yinzheqi@mail.ustc.edu.cn;kooky@mail.ustc.edu.cn
  • Supported by:

    Project supported by the National Basic Research Program of China (Grant Nos. 2011CBA00200 and 2011CB921200) and the National Natural Science Foundation of China (Grant Nos. 61101137, 61201239, and 61205118).

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摘要：

In a quantum key distribution (QKD) system, the error rate needs to be estimated for determining the joint probability distribution between legitimate parties, and for improving the performance of key reconciliation. We propose an efficient error estimation scheme for QKD, which is called parity comparison method (PCM). In the proposed method, the parity of a group of sifted keys is practically analysed to estimate the quantum bit error rate instead of using the traditional key sampling. From the simulation results, the proposed method evidently improves the accuracy and decreases revealed information in most realistic application situations.

关键词: error estimation, parity comparison, quantum key distribution

Abstract:

In a quantum key distribution (QKD) system, the error rate needs to be estimated for determining the joint probability distribution between legitimate parties, and for improving the performance of key reconciliation. We propose an efficient error estimation scheme for QKD, which is called parity comparison method (PCM). In the proposed method, the parity of a group of sifted keys is practically analysed to estimate the quantum bit error rate instead of using the traditional key sampling. From the simulation results, the proposed method evidently improves the accuracy and decreases revealed information in most realistic application situations.

Key words: error estimation, parity comparison, quantum key distribution

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

  • 03.67.Dd
03.67.-a (Quantum information) 03.67.Hk (Quantum communication)