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Improved polar-code-based efficient post-processing algorithm for quantum key distribution

Combined with one-time pad encryption scheme, quantum key distribution guarantees the unconditional security of communication in theory. However, error correction and privacy amplification in the post-processing phase of quantum key distribution result in high time delay, which limits the final secr...

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Autores principales: Fang, Junbin, Yi, Zhengzhong, Li, Jin, Liang, Zhipeng, Wu, Yulin, Lei, Wen, Jiang, Zoe Lin, Wang, Xuan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9203549/
https://www.ncbi.nlm.nih.gov/pubmed/35710795
http://dx.doi.org/10.1038/s41598-022-14145-6
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author Fang, Junbin
Yi, Zhengzhong
Li, Jin
Liang, Zhipeng
Wu, Yulin
Lei, Wen
Jiang, Zoe Lin
Wang, Xuan
author_facet Fang, Junbin
Yi, Zhengzhong
Li, Jin
Liang, Zhipeng
Wu, Yulin
Lei, Wen
Jiang, Zoe Lin
Wang, Xuan
author_sort Fang, Junbin
collection PubMed
description Combined with one-time pad encryption scheme, quantum key distribution guarantees the unconditional security of communication in theory. However, error correction and privacy amplification in the post-processing phase of quantum key distribution result in high time delay, which limits the final secret key generation rate and the practicability of quantum key distribution systems. To alleviate this limitation, this paper proposes an efficient post-processing algorithm based on polar codes for quantum key distribution. In this algorithm, by analyzing the channel capacity of the main channel and the wiretap channel respectively under the Wyner’s wiretap channel model, we design a codeword structure of polar codes, so that the error correction and privacy amplification could be completed synchronously in a single step. Through combining error correction and privacy amplification into one single step, this efficient post-processing algorithm reduces complexity of the system and lower the post-processing delay. Besides, the reliable and secure communicaiton conditions for this algorithm has been given in this paper. Simulation results show that this post-processing algorithm satisfies the reliable and secure communication conditions well.
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spelling pubmed-92035492022-06-18 Improved polar-code-based efficient post-processing algorithm for quantum key distribution Fang, Junbin Yi, Zhengzhong Li, Jin Liang, Zhipeng Wu, Yulin Lei, Wen Jiang, Zoe Lin Wang, Xuan Sci Rep Article Combined with one-time pad encryption scheme, quantum key distribution guarantees the unconditional security of communication in theory. However, error correction and privacy amplification in the post-processing phase of quantum key distribution result in high time delay, which limits the final secret key generation rate and the practicability of quantum key distribution systems. To alleviate this limitation, this paper proposes an efficient post-processing algorithm based on polar codes for quantum key distribution. In this algorithm, by analyzing the channel capacity of the main channel and the wiretap channel respectively under the Wyner’s wiretap channel model, we design a codeword structure of polar codes, so that the error correction and privacy amplification could be completed synchronously in a single step. Through combining error correction and privacy amplification into one single step, this efficient post-processing algorithm reduces complexity of the system and lower the post-processing delay. Besides, the reliable and secure communicaiton conditions for this algorithm has been given in this paper. Simulation results show that this post-processing algorithm satisfies the reliable and secure communication conditions well. Nature Publishing Group UK 2022-06-16 /pmc/articles/PMC9203549/ /pubmed/35710795 http://dx.doi.org/10.1038/s41598-022-14145-6 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Fang, Junbin
Yi, Zhengzhong
Li, Jin
Liang, Zhipeng
Wu, Yulin
Lei, Wen
Jiang, Zoe Lin
Wang, Xuan
Improved polar-code-based efficient post-processing algorithm for quantum key distribution
title Improved polar-code-based efficient post-processing algorithm for quantum key distribution
title_full Improved polar-code-based efficient post-processing algorithm for quantum key distribution
title_fullStr Improved polar-code-based efficient post-processing algorithm for quantum key distribution
title_full_unstemmed Improved polar-code-based efficient post-processing algorithm for quantum key distribution
title_short Improved polar-code-based efficient post-processing algorithm for quantum key distribution
title_sort improved polar-code-based efficient post-processing algorithm for quantum key distribution
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9203549/
https://www.ncbi.nlm.nih.gov/pubmed/35710795
http://dx.doi.org/10.1038/s41598-022-14145-6
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