Security of biased BB84 quantum key distribution with finite resource

In the original BB84 quantum key distribution protocol, the states are prepared and measured randomly, which lose the unmatched detection results. To improve the sifting efficiency, biased bases selection BB84 protocol is proposed. Meanwhile, a practical quantum key distribution protocol can only tr...

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Bibliographic Details
Published inChinese physics B Vol. 23; no. 10; pp. 24 - 31
Main Author 赵良圆 李宏伟 银振强 陈巍 尤娟 韩正甫
Format Journal Article
LanguageEnglish
Published 01.10.2014
Subjects
BB84协议
Decoys
Error analysis
Fluctuation
Mathematical analysis
Quantum cryptography
Qubits (quantum computing)
Screening (sizing)
Security
Sifting
基地选择
安全性
有限资源
检测结果
量子密钥分发协议
量子密钥分配协议
随机测量
Online AccessGet full text
ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/23/10/100304

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Summary:In the original BB84 quantum key distribution protocol, the states are prepared and measured randomly, which lose the unmatched detection results. To improve the sifting efficiency, biased bases selection BB84 protocol is proposed. Meanwhile, a practical quantum key distribution protocol can only transmit a finite number of signals, resulting in keys of finite length. The previous techniques for finite-key analysis focus mainly on the statistical fluctuations of the error rates and yields of the qubits. However, the prior choice probabilities of the two bases also have fluctuations by taking into account the finite-size effect. In this paper, we discuss the security of biased decoy state BB84 protocol with finite resources by considering all of the statistical fluctuations. The results can be directly used in the experimental realizations.
Bibliography:Zhao Liang-Yuan, Li Hong-Wei, Yin Zhen-Qiang, Chen Wei, You Juan, and Han Zheng-Fu（ a） Key Laboratory of Quantum Information, 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） zhengzhou Information Science and Technology Institute, Zhengzhou 450004, China
In the original BB84 quantum key distribution protocol, the states are prepared and measured randomly, which lose the unmatched detection results. To improve the sifting efficiency, biased bases selection BB84 protocol is proposed. Meanwhile, a practical quantum key distribution protocol can only transmit a finite number of signals, resulting in keys of finite length. The previous techniques for finite-key analysis focus mainly on the statistical fluctuations of the error rates and yields of the qubits. However, the prior choice probabilities of the two bases also have fluctuations by taking into account the finite-size effect. In this paper, we discuss the security of biased decoy state BB84 protocol with finite resources by considering all of the statistical fluctuations. The results can be directly used in the experimental realizations.
biased basis selection, security bound, quantum key distribution
11-5639/O4
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/23/10/100304