量子保密通信应用与技术探讨

Discussion on quantum secure communication application and technology

近年来,基于量子密钥分发的量子保密通信在应用方面进行了新的尝试和拓展。基于量子密钥分发在传输距离和密钥成码率方面的研究进展和局限,提出了基于量子密钥分发的量子保密通信可分为量子密钥在线分发和量子密钥在线与离线结合分发两种模式;并基于两种模式的优劣势,提出两种模式的典型应用场景;最后对量子密钥分发在技术、设备、组网、网络能力提供等方面面临的问题进行了分析,并提出了一些解决思路。量子保密通信的应用也与传统加密通信业务、系统和网络的发展紧密相关,需要产业链共同积极推动。

In recent years,new trials and expansions have been made in the application of quantum secure communication based on Quantum Key Distribution(QKD).In this paper,based on the progress and limitations of QKD in terms of transmission distance and key generation rate,we propose that quantum secure communication based on QKD can be divided into two modes:online distribution of quantum keys and online&offline combined distribution of quantum keys.The advantages and disadvantages of the two modes are analyzed,and the typical application scenarios of these two modes are introduced.The problems faced by QKD in terms of technology,equipment,networking,and network capability provision are discussed,and some solutions are proposed.The application of quantum secure communication is also closely related to the development of traditional encrypted communication services,systems and networks,and needs to be actively promoted by the industry chain.