Wei Qi

Quantum key distribution (QKD) has been proven to be an essential technology to resist the threat of quantum computing. Major technological powers such as the United States and countries in Europe have already begun the development of quantum key distribution networks. After years of technological research, China has further developed the operational-level 10,000-kilometre quantum secure communication network for business applications ‘China Quantum Communication Network’ (CN-QCN), developed based on ‘Shanghai-Beijing Backbone’. This report summarizes the advanced practices of CN-QCN in areas such as Backbone and　Metropolitan networks organization and network management. It also highlights several initiatives designed to enhance the network usability, proposes a method for evaluating the availability of quantum networks.

The improvement of quantum computing capability will bring a fatal threat to the traditional encryption and decryption system, and directly threaten the security of business data such as transaction data encryption, digital signatures, electronic contracts, and cross-domain transmission.This report introduces the research progress and successful cases of the application of quantum encryption in the financial field in China, and introduces the progress and research direction of the integration of QKD and PQC.