Kirsanov, N.; Pastushenko, V.; Kodukhov, A.; Aliev, A.; Yarovikov, M.; Strizhak, D.; Zarubin, I.; Smirnov, A.; Pflitsch, M.; Vinokur, V. Loss Control-Based Key Distribution under Quantum Protection. Entropy2024, 26, 437.
Kirsanov, N.; Pastushenko, V.; Kodukhov, A.; Aliev, A.; Yarovikov, M.; Strizhak, D.; Zarubin, I.; Smirnov, A.; Pflitsch, M.; Vinokur, V. Loss Control-Based Key Distribution under Quantum Protection. Entropy 2024, 26, 437.
Kirsanov, N.; Pastushenko, V.; Kodukhov, A.; Aliev, A.; Yarovikov, M.; Strizhak, D.; Zarubin, I.; Smirnov, A.; Pflitsch, M.; Vinokur, V. Loss Control-Based Key Distribution under Quantum Protection. Entropy2024, 26, 437.
Kirsanov, N.; Pastushenko, V.; Kodukhov, A.; Aliev, A.; Yarovikov, M.; Strizhak, D.; Zarubin, I.; Smirnov, A.; Pflitsch, M.; Vinokur, V. Loss Control-Based Key Distribution under Quantum Protection. Entropy 2024, 26, 437.
Abstract
Quantum cryptography revolutionizes secure information transfer, providing defense against both quantum and classical computational attacks. The primary challenge in extending the reach of quantum communication comes from the exponential decay of signals over long distances. Addressing this challenge, we have developed Quantum-protected Control-based Key Distribution (QCKD), overcoming transmission range limitations by monitoring signal leakages and rendering leaked quantum states significantly non-orthogonal. This paper reports on the experiments with the QCKD, conducted over a 1,707 km fiber line. We demonstrate advancements in critical components of the protocol, showing its remarkable scalability and adaptability for extended distances and multi-user configurations.
Keywords
quantum key distribution; optical fiber; Rayleigh scattering; loss control; transmittometry; optical time-domain reflectometry; line tomography, privacy amplification.
Subject
Physical Sciences, Quantum Science and Technology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.