Satellite quantum key distribution performance analysis and optimization with finite key size constraints
Satellite quantum key distribution performance analysis and optimization with finite key size constraints
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DOI：
10.1117/12.2651549
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发表时间：
2023-03
期刊：
影响因子：
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通讯作者：
Jasminder S. Sidhu;T. Brougham;Duncan McArthur;Roberto G. Pousa;D. Oi
中科院分区：
文献类型：
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作者：
Jasminder S. Sidhu;T. Brougham;Duncan McArthur;Roberto G. Pousa;D. Oi
量子密钥分发（QKD）是一种潜在的缓解措施，可以缓解威胁当前部署的公钥密码系统的量子计算进步。QKD也是大规模量子通信和量子互联网的先驱。量子光子信号的地面直接传输受到光纤指数吸收的限制，因此已经提出了用于通过真空进行低损耗自由空间传输的量子密钥洲际分发的天基系统。然而，卫星QKD（SatQKD）的实际部署仍然面临挑战，例如天气，背景光和终端部署。特别是，低地球轨道卫星QKD固有的短传输时间和有限的统计不确定性可以限制安全密钥生成。在这里，我们说明了这些影响的分析和一些实际的工程设计和操作限制的密钥长度使用卫星量子建模和分析（SatQuMA）软件包正在开发的卫星量子通信研究。
Quantum Key Distribution (QKD) is a potential mitigation against quantum computation advances that threaten currently deployed public key cryptosystems. QKD is also a precursor to large-scale quantum communications and the quantum internet. Terrestrial direct transmission of quantum photonic signals is restricted by optical fibre exponential absorption, hence space-based systems have been proposed for intercontinental distribution of quantum keys with lower-loss free-space transmission through vacuum. However, challenges remain for the practical deployment of satellite QKD (SatQKD) such as weather, background light, and terminal deployment. In particular, the short transmission time inherent in low Earth orbit satellite QKD and finite statistical uncertainty can limit secure key generation. Here we illustrate the analysis of these effects and some practical engineering design and operational constraints on key length using the Satellite Quantum Modelling and Analysis (SatQuMA) software package being developed for satellite quantum communications research.