论文标题
对卫星到卫星自由空间光学频道的秘密钥匙蒸馏，并带有动态定位
Secret Key Distillation over Satellite-to-satellite Free-space Optics Channel with Eavesdropper Dynamic Positioning
论文作者
论文摘要
量子密码学研究中常规的无所不能的窃听假设对于某些现实情况来说可能太严格了。在本文中，我们研究了卫星到卫星自由空间光学渠道的秘密钥匙蒸馏渠道，我们假设窃听器（EVE）受到限制，因为她的孔径尺寸有限，因此她的电力收集能力受到限制，但可以改变孔径的位置，从而在沟通派对（Alice and Bob）中获得优势（Alice and Bob），并确定相对于达到较低的范围，并确定了相对于达到较低的范围。我们首先研究了前夕在鲍勃后面的情况，我们证明了她在长距离传输案例中为她的最佳窃听策略是将她的光圈放在梁传输轴上，并将BOB到EVE的距离设置为等于Alice-Bob距离。我们还表明，可实现的关键速率的特征是贝塞尔函数与夏娃在短途传输案例中的位置相关的积分。然后，我们调查了夏娃在鲍勃之前的情况，并与Eve和Bob的角色交换了相似的结果。
The conventional omnipotent eavesdropper assumption in quantum cryptography study can be too strict for some realistic scenarios. In this paper, we study the secret key distillation over a satellite-to-satellite free space optics channel in which we assume that the eavesdropper (Eve) is restricted in her ability of power collection due to the limited size of her aperture but can change the position of her aperture to gain advantages over the communication parties (Alice and Bob) and we determine the achievable key rate lower and upper bounds with respect to different scenarios. We first study the case where Eve is behind Bob and we prove that the optimal eavesdropping strategy for her in long-distance transmission case is to place her aperture on the beam transmission axis and set Bob-to-Eve distance equal to Alice-to-Bob distance. We also show that the achievable key rate would be characterized by a Bessel function integral related to Eve's position in a short-distance transmission case. We then investigate the case where Eve is before Bob and show similar results with Eve's and Bob's roles exchanged.
