Systems and Means of Informatics

2026, Volume 36, Issue 3, pp 69-85

EFFICIENCY OF QUANTUM KEY DISTRIBUTION IN SATELLITE OPTICAL COMMUNICATIONS

M. V. Sapozhnikov
S. Yu. Kazantsev
Yu. B. Mironov
B. M. Shabanov
A. E. Matyunin

Abstract

The paper evaluates the feasibility of using quantum key distribution in satellite optical communications. A methodology for calculating the performance indicators of satellite quantum key distribution, including the overall throughput efficiency of such a communication channel, is verified. The methodology is verified by qualitatively comparing the obtained results with data from a full- scale satellite quantum key distribution experiment between the Micius quantum satellite and a ground station located in Zvenigorod. The maximum effective length of the satellite channel is estimated for three standard wavelengths: 850, 1310, and 1550 nm. For a wavelength of 850 nm, the performance indicators of quantum key distribution are calculated taking into account the BB84 and B92 protocols. The study confirms the fundamental feasibility of using quantum key distribution in satellite optical communications.

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