论文标题
在合法接收器的同一平面上，对卫星到卫星自由空间光学通道的秘密钥匙蒸馏
Secret key distillation over satellite-to-satellite free-space optics channel with a limited-sized aperture eavesdropper in the same plane of the legitimate receiver
论文作者
论文摘要
通常，通过量子密码学研究了无条件的信息安全性，尽管无所不能的窃听者的假设对于某些现实的实现过于严格。在本文中，我们研究了在合法接收器（BOB）的同一平面上假设有限尺寸的孔径窃听器（EVE）对卫星到灵活的空间光学光学通道上的现实秘密钥匙蒸馏，并确定秘密密钥率降低限制。在优化输入功率以确定下限为传输距离，中心频率或EVE孔径半径的功能之前，我们首先研究了输入功率依赖性，而没有对BOB检测方案的假设。然后，我们计算有关SKR下限和上限的分析表达式，因为传输距离到无穷大。我们还合并了特定的离散变量（DV）和连续变量（CV）协议，以进行比较。我们证明，与传统的不受限制的夏娃场景相比，可以显着更高的SKR下限。
Conventionally, unconditional information security has been studied by quantum cryptography although the assumption of an omnipotent eavesdropper is too strict for some realistic implementations. In this paper, we study the realistic secret key distillation over a satellite-to-satellite free space optics channel where we assume a limited-sized aperture eavesdropper (Eve) in the same plane of the legitimate receiver (Bob) and determine the secret key rate lower bounds correspondingly. We first study the input power dependency without assumptions on Bob's detection scheme before optimizing the input power to determine lower bounds as functions of transmission distances, center frequency or Eve aperture radius. Then we calculate analytical expressions regarding the SKR lower bound and upper bound as transmission distance goes to infinity. We also incorporate specific discrete variable (DV) and continuous variable (CV) protocols for comparison. We demonstrate that significantly higher SKR lower bounds can be achieved compared to traditional unrestricted Eve scenario.
