Practical analysis of decoy method in QKD over underwater optical fiber

Davide Bacco; Domenico Ribezzo; Mujtaba Zahidy; Claudia De Lazzari; Ilaria Vagniluca; Antoine Petitjean; Gianmarco Lemmi; Tommaso Occhipinti; Francesco Saverio Cataliotti; Leif K. Oxenløwe; André Xuereb; Alessandro Zavatta

doi:10.1117/12.2647846

8 March 2023 Practical analysis of decoy method in QKD over underwater optical fiber

Davide Bacco, Domenico Ribezzo, Mujtaba Zahidy, Claudia De Lazzari, Ilaria Vagniluca, Antoine Petitjean, Gianmarco Lemmi, Tommaso Occhipinti, Francesco Saverio Cataliotti, Leif K. Oxenløwe, André Xuereb, Alessandro Zavatta

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Proceedings Volume 12446, Quantum Computing, Communication, and Simulation III; 124460D (2023) https://doi.org/10.1117/12.2647846
Event: SPIE Quantum West, 2023, San Francisco, California, United States

Abstract

Quantum key distribution (QKD) is the first commercial application of the second quantum revolution. Although QKD systems have already been developed and implemented all around the world, some open challenges are limiting the overall deployment of this technology (limited key rate, limited link distance, etc.). By improving the current QKD protocols, it is possible to increase the final secret key generation rate. In this work, we compare 1-decoy with 2-decoy methods in BB84 protocol over an underwater optical fiber link connecting Malta to Italy, showing that 2-decoy can achieve more than twice the key rate of 1-decoy method.

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Davide Bacco, Domenico Ribezzo, Mujtaba Zahidy, Claudia De Lazzari, Ilaria Vagniluca, Antoine Petitjean, Gianmarco Lemmi, Tommaso Occhipinti, Francesco Saverio Cataliotti, Leif K. Oxenløwe, André Xuereb, and Alessandro Zavatta "Practical analysis of decoy method in QKD over underwater optical fiber", Proc. SPIE 12446, Quantum Computing, Communication, and Simulation III, 124460D (8 March 2023); https://doi.org/10.1117/12.2647846

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