Finite-key security of passive quantum key distribution

IF 3.8 2区物理与天体物理 Q2 PHYSICS, APPLIED

Physical Review Applied Pub Date : 2024-01-11 DOI:10.1103/physrevapplied.21.014018

Víctor Zapatero, Marcos Curty

引用次数: 0

Abstract

The passive approach to quantum key distribution (QKD) eliminates all optical modulators and random number generators from QKD systems reaching an enhanced simplicity, immunity to modulator side channels, and potentially higher repetition rates. In this work, we provide finite-key security bounds for a fully passive decoy-state Bennett-Brassard 1984 (BB84) protocol, considering a recently presented passive QKD source. With our analysis, the attainable secret-key rate is comparable to that of the perfect parameter-estimation limit, in fact differing from the key rate of the active approach by less than one order of magnitude. This demonstrates the practicality of fully passive QKD solutions.

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被动量子密钥分发的有限密钥安全性

量子密钥分发（QKD）的无源方法消除了 QKD 系统中的所有光调制器和随机数发生器，从而提高了系统的简洁性、对调制器侧信道的免疫力，并可能实现更高的重复率。在这项工作中，我们考虑到最近提出的无源 QKD 源，为完全无源诱饵状态的 Bennett-Brassard 1984 (BB84) 协议提供了有限密钥安全边界。通过我们的分析，可实现的密钥速率与完美参数估计极限相当，实际上与主动方法的密钥速率相差不到一个数量级。这证明了完全无源 QKD 解决方案的实用性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physical Review Applied PHYSICS, APPLIED-

CiteScore

7.80

自引率

8.70%

发文量

760

审稿时长

2.5 months

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