SECURITY OF PRACTICAL PHASE-CODING QUANTUM KEY DISTRIBUTION

被引：0

作者：

Li, Hong-Wei ^{[1
,2
]}

Yin, Zhen-Qiang ^{[1
]}

Han, Zheng-Fu ^{[1
]}

Bao, Wan-Su ^{[2
]}

Guo, Guang-Can ^{[1
]}

机构：

[1] Univ Sci & Technol China, Key Lab Quantum Informat, Hefei 230026, Peoples R China

[2] Informat Engineer Univ, Elect Technol Inst, Zhengzhou 450004, Peoples R China

来源：

QUANTUM INFORMATION & COMPUTATION | 2010年 / 10卷 / 9-10期

基金：

中国国家自然科学基金;

关键词：

Security; quantum key distribution; phase-coding; unbalanced Mach-Zehnder interferometer; CRYPTOGRAPHY;

D O I：

暂无

中图分类号：

TP301 [理论、方法];

学科分类号：

081202 ;

摘要：

Security proof of practical quantum key distribution (QKD) has attracted a lot of attentions in recent years. Most of real-life QKD implementations are based on phase-coding BB84 protocol, which usually use Unbalanced Mach-Zehnder Interferometer (UMZI) as the information encoder and decoder. However, the long arm and short arm of UMZI will introduce different loss in practical experimental realizations, the state emitted by Alice's side is nolonger perfect BB84 states correspondingly. In this paper, we will give the security analysis in this situation. Counterintuitively, active compensation for this different loss will only lower the secret key bit rate.

引用

页码：771 / 779

页数：9

共 21 条

[1]

Bennett C. H., 2014, Theoretical computer science, P175, DOI [DOI 10.1016/J.TCS.2014.05.025, 10.1016/j.tcs.2014.05.025]

[2] QUANTUM CRYPTOGRAPHY USING ANY 2 NONORTHOGONAL STATES [J].

BENNETT, CH .

PHYSICAL REVIEW LETTERS, 1992, 68 (21) :3121-3124

[3] Limitations on practical quantum cryptography [J].

Brassard, G ;

Lütkenhaus, N ;

Mor, T ;

Sanders, BC .

PHYSICAL REVIEW LETTERS, 2000, 85 (06) :1330-1333

[4] Quantum cryptography [J].

Gisin, N ;

Ribordy, GG ;

Tittel, W ;

Zbinden, H .

REVIEWS OF MODERN PHYSICS, 2002, 74 (01) :145-195

[5] Quantum key distribution over 122 km of standard telecom fiber [J].

Gobby, C ;

Yuan, ZL ;

Shields, AJ .

APPLIED PHYSICS LETTERS, 2004, 84 (19) :3762-3764

[6]

Gottesman D, 2004, QUANTUM INF COMPUT, V4, P325

[7] Stability of phase-modulated quantum key distribution systems [J].

Han, ZF ;

Mo, XF ;

Gui, YZ ;

Guo, GC .

APPLIED PHYSICS LETTERS, 2005, 86 (22) :1-3

[8] QUANTUM CRYPTOGRAPHY WITH COHERENT STATES [J].

HUTTNER, B ;

IMOTO, N ;

GISIN, N ;

MOR, T .

PHYSICAL REVIEW A, 1995, 51 (03) :1863-1869

[9] Quantum key distribution with high loss: Toward global secure communication [J].

Hwang, WY .

PHYSICAL REVIEW LETTERS, 2003, 91 (05) :579011-579014

[10]

Lo H. K., 2005, QUANTPH0504209

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