有限密钥水下量子密钥分发：性能分析与改进
Finite Key Underwater Quantum Key Distribution: Performance Analysis and Improvements
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中文总结 AI 辅助
研究水下有限密钥量子密钥分发，评估两种诱骗态协议模拟性能，发现特定水下信道中简单协议表现更佳，还研究了通过经典优势提取提高水下QKD性能及最大支持距离的方法。
中文摘要 AI 辅助
量子密钥分发（QKD）可让两方建立对计算能力无限的对手安全的密钥。该领域多数实验和理论研究聚焦于光纤或自由空间信道上QKD的性能。然而，越来越多工作开始研究它在水下场景的性能。本文考虑实际的有限密钥场景，评估两种不同诱骗态协议的模拟性能。我们发现某些水下信道中‘更简单’的QKD协议比更复杂的表现更好。最后，我们还研究了提高水下QKD性能的方法，特别是经典优势提取，它能大幅提高水下QKD支持的最大距离。
英文摘要
Quantum key distribution (QKD) allows for the establishment of a secret key between two parties, secure against computationally unbounded adversaries. Most experimental and theoretical research in this area, investigates the performance of QKD over fiber or free space channels. A growing body of work, however, has begun to investigate its performance in underwater scenarios. Here, we consider the realistic finite key scenario, and evaluate the simulated performance of two different decoy state protocols. We show that there are certain underwater channels where "simpler" QKD protocols outperform more complex ones. Finally, we also investigate methods to improve QKD performance underwater, specifically looking at classical advantage distillation, which we show can greatly improve the maximal distance supported by QKD underwater.
