飞行中继平台的MDI-QKD应用性能

量子密钥分发（Quantum Key Distribution, QKD）技术的应用领域不断拓宽，其良好的安全保密性能可以有效应对通信安全威胁，在航空通信领域，基于航空飞行平台应用量子密钥分发技术有望大幅提升航空通信系统安全性级别，为局部地区保密通信提供可靠保障，进一步提高区域安全通信保障能力。针对非对称传输效率测量设备无关量子密钥分发（Measurement Device Independent QKD, MDI-QKD）协议在机载条件下的应用问题，在以飞行平台作为测量节点的测量设备无关量子密钥分发技术应用场景下，应用诱骗态协议建立了仿真分析模型，分析了气象条件、飞行高度对系统仿真性能的影响。仿真实验结果表明，在15 km能见度的晴朗天气下，在无人机常用高度飞行的空中移动平台应用诱骗态测量设备无关量子密钥分发协议可以提供作战通信保障，在较远距离通信中存在通信盲区和飞行平台运动限制。同时证明了优化选择信号光源光脉冲强度方案可以有效提高通信能力。实验及分析为量子密钥分发技术在飞行平台上的后续研究和实际应用提供了理论分析基础和优化方法。

Performance of Measurement Device Independent Quantum Key Distribution on flight repeater platform

Quantum Key Distribution （QKD） technology now is used in more fields with its good security and confidentiality performance can effectively deal with communication security threats. The application of QKD technology based on aviation flight platform is expected to greatly improve the security level of aviation communication system and provide reliable guarantee for local area secure communication. To analyze airborne application of Measurement Device Independent QKD（MDI-QKD） with asymmetric transmission efficiency, the simulation analysis model combined with the decoy state method was established. The effect of meteorological conditions, flight height on the performance of the system simulation were analyzed. The results show that the application of MDI-QKD protocol in the air mobile platform at the common flight altitude of early-warning aircraft can provide combat communication guarantee under the fine weather with the visibility of about 15 km, but there are communication blind areas and movement restrictions of the flight platform in the long-distance communication. Further experiment indicates the adjustment of signal pulse intensity is an effective method to improve the performance. Above all, the experiment provides theoretical basis and optimization method for the further research and practical application of QKD on flight repeater platform.