Abstract

The results of investigation of the spectral characteristics of some passive fiber-optic components, such as optical isolators, circulators, spectral filters and multiplexers, used in quantum key distribution (QKD) systems and contributing to the protection of QKD system from active optical probing attacks are presented. An assessment of the required degree of isolation is also given, which ensures reliable protection of the QKD system against Trojan-horse attacks under the most stringent conditions for legitimate users. Based on the formulated requirements and measurement results, the effectiveness of protection using the investigated passive insulating components is analyzed. Using the example of calculating the insulation for the QKD system scheme presented in the work, the achievement of the required level of isolation (150 dB) in the entire considered spectral range is shown.

中文翻译：

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在1260–1650 nm光谱范围内对量子密钥分配系统进行特洛伊木马攻击的对策风险分析

摘要

对一些用于量子密钥分配（QKD）系统的无源光纤组件（例如光学隔离器，环行器，频谱滤波器和多路复用器）的光谱特性进行调查的结果，这些数据有助于保护QKD系统免受有源光探测攻击被提出。还对所需的隔离度进行了评估，以确保在最严格的合法用户条件下，可靠地保护QKD系统免受特洛伊木马攻击。根据制定的要求和测量结果，分析了使用所研究的无源绝缘组件的保护效果。以工作中介绍的QKD系统方案的绝缘计算示例为例，