Quantum key distribution with high loss: Toward global secure communication

被引：1412

作者：

Hwang, WY ^{[1
]}

机构：

[1] Northwestern Univ, Dept Elect & Comp Engn, Evanston, IL 60208 USA

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.91.057901

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose a decoy-pulse method to overcome the photon-number-splitting attack for Bennett-Brassard 1984 quantum key distribution protocol in the presence of high loss: A legitimate user intentionally and randomly replaces signal pulses by multiphoton pulses (decoy pulses). Then they check the loss of the decoy pulses. If the loss of the decoy pulses is abnormally less than that of signal pulses, the whole protocol is aborted. Otherwise, to continue the protocol, they estimate the loss of signal multiphoton pulses based on that of decoy pulses. This estimation can be done with an assumption that the two losses have similar values. We justify that assumption.

引用

页码：579011 / 579014

页数：4

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