论文标题
量子密钥分布的安全性分布不完美的随机化
Security of quantum key distribution with imperfect phase randomisation
论文作者
论文摘要
量子钥匙分布（QKD）的性能受到多光子排放的严重限制，这是由于光子数拆分攻击。最有效的解决方案是诱饵态方法，要求所有透射脉冲的阶段都是独立且均匀的。但是，实际上，这些阶段通常是相关的，尤其是在高速系统中，这会打开安全漏洞。在这里，我们通过为诱饵状态QKD提供了相关阶段的诱饵状态QKD的安全证明，从而解决了这个紧迫的问题，该阶段提供了接近理想情况的关键率。我们的工作铺平了通过实用激光来源朝着高性能安全QKD铺平的道路，并且可能具有QKD以外的应用程序。
The performance of quantum key distribution (QKD) is severely limited by multiphoton emissions, due to the photon-number-splitting attack. The most efficient solution, the decoy-state method, requires that the phases of all transmitted pulses are independent and uniformly random. In practice, however, these phases are often correlated, especially in high-speed systems, which opens a security loophole. Here, we address this pressing problem by providing a security proof for decoy-state QKD with correlated phases that offers key rates close to the ideal scenario. Our work paves the way towards high-performance secure QKD with practical laser sources, and may have applications beyond QKD.
