China's advancements in quantum communication and infrastructure building

China's presence in the #quantum tech arena continues to intrigue many. While language differences play a part, it's the information disclosure practices that add layers of complexity. To shed some light on this, here's a concise summary of #quantum #communication advancements, accompanied by a link to an in-depth report. Notably, the report doesn't delve into the offensive potential or advancements in quantum computing.

Clearly, #China is not only advancing rapidly in quantum communication infrastructure but also establishing stringent security standards for such communications. There are a few major areas.

1. QKD technology development forms a crucial part of the developments that China undertakes.

- Fibre-based Transmission: China's advancements in #QKD technologies in 2022 have set new records in transmission lengths. The TF-QKD transmission distance was refreshed to an impressive 833 km, marking a significant leap in secure quantum communication over vast land distances.

- Satellite Quantum Communication: The Mozi satellite has set a new benchmark with a QKD distance of 1200 km. Coupled with the successful launch of the Jinan 1 micro-nano satellite, China is firmly establishing its leadership in satellite-based quantum communication.

2. Infrastructure building is another critical aspect. Quantum City Network: In terms of practical QKD network construction, China's Hefei Quantum City Metropolitan Network (China's largest quantum metropolitan network, consisting of 8 core sites and 159 access sites, with a total fiber length of 1,147 km) provides quantum secure access services to nearly 500 party and government agencies at the city and district levels.

3. Quantum Security Standards: As of January 2023, China has released 7 standards for quantum communication and security, with 5 of them in the communication (YD) field and 2 in the national secret (GM) field. China's national standards have expanded from the communication field to the national secret field, indicating a further widening of the coverage of quantum security communication technology in China's industry. China has not yet publicly disclosed any institutions that are working on post-quantum encryption algorithms, but based on China's past efforts in cryptography and related projects, it may begin in the two years following NIST's release.

China's commitment to quantum tech, telecom innovations, and security standards is evident. It's exhilarating to see where these developments will lead in the near future.

For a deeper dive, check out the original paper.