发送或不发送双字段量子密钥分布与弱随机性的安全分析
Xiao-Lei Jiang1,2, Yang Wang1,2,3, Yi-Fei Lu1,2
1Henan Key Laboratory of Quantum Information and Cryptography, SSF IEU, Zhengzhou 450001, China.
Entropy (Basel, Switzerland)
|July 8, 2023
概括
发送或不发送双场量子密钥分布 (SNS TF-QKD) 保持了高性能,尽管随机性较弱. 这种量子密钥分配方法超越了安全边界,并且比其他协议提供了更大的稳定性.
科学领域:
- 量子信息科学 量子信息科学
- 量子密码学 量子密码学
- 信息安全 信息安全
背景情况:
- 量子密钥分配 (QKD) 通过量子力学实现了安全的通信.
- 发送或不发送双场量子密钥分布 (SNS TF-QKD) 在容错率和密钥速率上提供了超出无重复器限制的优势.
- 实际QKD系统中的弱随机性可能会降低性能并限制通信距离.
研究的目的:
- 分析弱随机性对SNS TF-QKD性能的影响.
- 为了评估SNS TF-QKD对弱随机性漏洞的稳定性.
- 在非理想条件下将SNS TF-QKD与其他QKD协议进行比较.
主要方法:
- 使用数值模拟来建模SNS TF-QKD.
- 该研究评估了在弱随机情况下的秘密密钥速率和可实现的通信距离.
- 对BB84和测量设备独立的QKD (MDI-QKD) 协议进行了比较分析.
主要成果:
- SNS TF-QKD即使在随机性较弱的情况下也表现出色.
- SNS TF-QKD的秘密密钥率可以超越PLOB边界,从而实现远距离通信.
- 与BB84和MDI-QKD相比,SNS TF-QKD对弱随机性具有更大的稳定性.
结论:
- 在量子状态中保持高的随机性对于保护QKD中的状态准备设备至关重要.
- SNS TF-QKD是安全远距离通信的有希望的协议,能够抵御实际的不完美.
- 这些发现强调了解决QKD系统设计中的随机性漏洞的重要性.
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