水下波长攻击离散调制的连续变量量子密钥分布
Kangyi Feng1, Yijun Wang1, Yin Li1
1School of Automation, Central South University, Changsha 410083, China.
Entropy (Basel, Switzerland)
|June 26, 2024
概括
这项研究介绍了用于水下量子密钥分配的波长攻击方案,使窃听者能够通过操纵光束分割器来窃取更多的秘密密钥. 该攻击利用蓝绿波段的波长依赖性属性来加强安全漏洞.
科学领域:
- 量子信息科学 量子信息科学
- 光学通信的安全性 光学通信的安全性
- 水下网络 水下网络
背景情况:
- 连续变量量子密钥分布 (CV-QKD) 对于安全通信至关重要.
- 波长攻击利用光束分割器的波长依赖性来破坏CV-QKD.
- 水下通道对于安全的通信至关重要,但对于QKD安全性来说却不那么被探索.
研究的目的:
- 提出和分析离散调制 (DM) CV-QKD在水下流道中的波长攻击方案.
- 为了研究这些攻击的有效性,并没有局部振荡器 (LO) 强度监测器.
- 为了确定窃听者可以最大限度地窃取钥匙的条件.
主要方法:
- 开发了两种针对水下DM-CV-QKD的新型波长攻击方案.
- 利用了聚合双圆形圆 (FBT) 束分离器的波长依赖的传导性能.
- 为Eve的脉冲操纵确定了特定的蓝绿波长.
- 根据道传输率和估计的过量噪声,推导出了攻击的成功标准.
主要成果:
- 两种拟议的波长攻击方案都有效地将爱丽丝和勃估计的过量噪声降低到零.
- 攻击的成功取决于根据通道传输率选择适当的条件参数.
- 数字分析证实,将估计的过量噪音降到最低,允许Eve窃取更多的秘密密钥.
结论:
- 波长攻击对水下离散调制CV-QKD系统构成重大威胁.
- 拟议的方案在带有和没有LO强度监测器的两个场景中都是有效的.
- 安全的水下量子通信需要对此类波长依赖的攻击采取对策.
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