Subcarrier wave continuous-variable quantum key distribution with Gaussian modulation: composable security analysis

In this paper, we continue the study of the quantum cryptographic GG02 protocol, performed using the approach based on the subcarrier waves. We modify the scheme via heterodyne detection and perform security analysis for the full trusted hardware noise model in the presence of collective attacks wit...

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Bibliographic Details
Published inKompʹûternaâ optika Vol. 47; no. 3; pp. 374 - 380
Main Authors Goncharov, R.K., Kiselev, A.D., Samsonov, E.O., Egorov, V.I.
Format Journal Article
LanguageEnglish
Published Samara National Research University 01.06.2023
Subjects
continuous variables
quantum key distribution
subcarrier waves
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Summary:In this paper, we continue the study of the quantum cryptographic GG02 protocol, performed using the approach based on the subcarrier waves. We modify the scheme via heterodyne detection and perform security analysis for the full trusted hardware noise model in the presence of collective attacks with finite-key effects. It is shown that the system can potentially distribute the key even if the level of losses in the channel is above 9 dB. This result is consistent with the general technical level and comply with modern standards of practical CV-QKD systems. Finally, the system under consideration fully meets the criterion of composability.
ISSN:0134-2452
2412-6179
DOI:10.18287/2412-6179-CO-1225