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System-level considerations for modeling space-based quantum key distribution architectures

机译：对基于空间的量子密钥分发体系结构进行建模的系统级注意事项

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Quantum Key Distribution (QKD) is a revolutionary technology which leverages the laws of quantum mechanics to distribute cryptographic keying material between two parties with theoretically unconditional security. Terrestrial QKD systems are limited to distances of <;200 km in both optical fiber and line-of-sight free-space configurations due to severe losses during single photon propagation and the curvature of the Earth. Thus, the feasibility of fielding a low Earth orbit (LEO) QKD satellite to overcome this limitation is being explored. Moreover, in August 2016, the Chinese Academy of Sciences successfully launched the world's first QKD satellite. However, many of the practical engineering performance and security tradeoffs associated with space-based QKD are not well understood for global secure key distribution. This paper presents several system-level considerations for modeling and studying space-based QKD architectures and systems. More specifically, this paper explores the behaviors and requirements that researchers must examine to develop a model for studying the effectiveness of QKD between LEO satellites and ground stations.
机译：量子密钥分发（QKD）是一项革命性的技术，它利用量子力学定律在理论上无条件安全的情况下在两方之间分发加密密钥材料。在单光子传播和地球曲率过程中，由于严重的损耗，地面QKD系统在光纤和视线自由空间配置中都被限制为小于200 km的距离。因此，正在探索部署低地球轨道（LEO）QKD卫星以克服此限制的可行性。此外，2016年8月，中国科学院成功发射了世界上第一颗QKD卫星。但是，对于基于全球的安全密钥分发，与基于天空的QKD相关的许多实际工程性能和安全性折衷方法尚未得到很好的理解。本文介绍了一些用于建模和研究基于空间的QKD体系结构和系统的系统级注意事项。更具体地说，本文探讨了研究人员在开发用于研究LEO卫星与地面站之间的QKD有效性的模型时必须检查的行为和要求。

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