Could you please recommend a source that explains a basic scheme of quantum key distribution in a backbone system?

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Len Leonid Mizrah

Dear Daniil Lobov,

You may want to take a look at the following:

https://en.wikipedia.org/wiki/Quantum_key_distribution

https://searchsecurity.techtarget.com/definition/quantum-key-distribution-QKD

https://www.idquantique.com/quantum-safe-security/overview/quantum-key-distribution/

https://arxiv.org/pdf/1903.09051.pdf

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7398518/

Article Scheduling of space to ground quantum key distribution

Article A low cost, short range quantum key distribution system

Hadi Jabbar Alagealy

see

SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS, NEXT-GENERATION NETWORKS, INTERNET OF THINGS AND SMART CITIES