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arXiv quant-ph/0212066quant-ph
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非理想设备下量子密钥分发的安全性

Security of quantum key distribution with imperfect devices

Daniel Gottesman, Hoi-Kwong Lo, Norbert Lütkenhaus, John Preskill

摘要:

本文证明了Bennett-Schmidard(BB84)量子密钥分发协议在信源和检测器处于敌手有限控制下的安全性。我们的证明适用于当源和检测器都有小的基础依赖的缺陷,这是典型的协议的实际实现。我们推导出一个一般的弱基依赖窃听攻击的渐近密钥生成率的下界,并估计在一些特殊情况下的速率:源发射弱相干态随机相位,检测器与基依赖的效率,和未对准的源和检测器。

英文摘要:

We prove the security of the Bennett-Brassard (BB84) quantum key distribution protocol in the case where the source and detector are under the limited control of an adversary. Our proof applies when both the source and the detector have small basis-dependent flaws, as is typical in practical implementations of the protocol. We derive a general lower bound on the asymptotic key generation rate for weakly basis-dependent eavesdropping attacks, and also estimate the rate in some special cases: sources that emit weak coherent states with random phases, detectors with basis-dependent efficiency, and misaligned sources and detectors.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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