Xu Shengjie, Li Yin, Mao Yun, Guo Ying
School of Automation, Central South University, Changsha 410083, China.
School of Computer, Beijing University of Posts and Telecommunications, Beijing 100876, China.
Entropy (Basel). 2022 Mar 9;24(3):383. doi: 10.3390/e24030383.
A saturation attack can be employed for compromising the practical security of continuous-variable quantum key distribution (CVQKD). In this paper, we suggest a countermeasure approach to resisting this attack by embedding an adjustable optical filter (AOF) in the CVQKD system. Numerical simulations illustrate the effects of the AOF-enabled countermeasure on the performance in terms of the secret key rate and transmission distance. The legal participants can trace back the information that has been eavesdropped by an attacker from the imperfect receiver, which indicates that this approach can be used for defeating a saturation attack in practical quantum communications.
饱和攻击可用于破坏连续变量量子密钥分发（CVQKD）的实际安全性。在本文中，我们提出了一种对策方法，通过在CVQKD系统中嵌入可调谐光学滤波器（AOF）来抵抗这种攻击。数值模拟说明了启用AOF的对策对秘密密钥率和传输距离方面性能的影响。合法参与者可以从不完善的接收器中追溯攻击者窃听的信息，这表明该方法可用于在实际量子通信中击败饱和攻击。
