Beating the photon-number-splitting attack in practical quantum cryptography

被引：1264

作者：

Wang, XB ^{[1
]}

机构：

[1] JST, ERATO, IMAI Quantum Computat & Informat Project, Bunkyo Ku, Tokyo 1330033, Japan

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.94.230503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose an efficient method to verify the upper bound of the fraction of counts caused by multiphoton pulses in practical quantum key distribution using weak coherent light, given whatever type of Eve's action. The protocol simply uses two coherent states for the signal pulses and vacuum for the decoy pulse. Our verified upper bound is sufficiently tight for quantum key distribution with a very lossy channel, in both the asymptotic and nonasymptotic case. So far our protocol is the only decoy-state protocol that works efficiently for currently existing setups.

引用

页数：4

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