诱状态量子密钥分布的现实的漏洞
Ivan Sushchev1,2, Kirill Bugai3,4, Sergei Molotkov5
1SFB Laboratory, LLC, Moscow, Russia, 127273. sushchev.is16@physics.msu.ru.
Scientific reports
|December 30, 2025
概括
激光损伤攻击 (LDA) 可以通过改变光学组件来破坏诱状态量子密钥分布 (QKD). 这使得窃听者能够使用明确的国家歧视 (USD) 窃取整个秘密密钥.
科学领域:
- 量子信息科学 量子信息科学
- 密码学 密码学 密码学
- 光子学 是一个光子学.
背景情况:
- 诱状态量子密钥分布 (QKD) 使用固定平均光子数来实现安全.
- 它容易受到改变光学元件的攻击,从而影响光子数估计.
研究的目的:
- 分析诱状态QKD中来自激光损伤攻击 (LDA) 和明确状态歧视 (USD) 的漏洞.
- 展示LDA如何使窃听者能够窃取秘密密钥而不被发现.
主要方法:
- 分析在QKD系统中结合LDA和USD的现实漏洞.
- 数值模拟以确认在平均光子数升高的情况下攻击的有效性.
- 展示了修改后的USD设置和伪光子数分辨率的USD攻击.
主要成果:
- LDA可以增加超出安全制度的平均光子数量,使USD拦截-重新发送攻击.
- 10-20 dB的变化值允许窃听者获取整个秘密密钥.
- 通过标准的安全检查,先进的美元攻击可能不会被检测到.
结论:
- 诱状态的QKD系统需要强大的防护措施来防止高功率激光损伤.
- 硬件选择,严格测试和实时监控对于QKD安全至关重要.
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