Experimental authentication of quantum key distribution with post-quantum cryptography

Abstract Quantum key distribution (QKD) can provide information theoretically secure key exchange even in the era of quantum computers. However, QKD requires the classical channel to be authenticated, the current method for which is pre-sharing symmetric keys. For a QKD network of n users, this meth...

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Autores principales:	Liu-Jun Wang, Kai-Yi Zhang, Jia-Yong Wang, Jie Cheng, Yong-Hua Yang, Shi-Biao Tang, Di Yan, Yan-Lin Tang, Zhen Liu, Yu Yu, Qiang Zhang, Jian-Wei Pan
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
Acceso en línea:	https://doaj.org/article/21bd95dd2dac4e908b3d63e924c0ae0b
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spelling	oai:doaj.org-article:21bd95dd2dac4e908b3d63e924c0ae0b2021-12-02T15:38:00ZExperimental authentication of quantum key distribution with post-quantum cryptography10.1038/s41534-021-00400-72056-6387https://doaj.org/article/21bd95dd2dac4e908b3d63e924c0ae0b2021-05-01T00:00:00Zhttps://doi.org/10.1038/s41534-021-00400-7https://doaj.org/toc/2056-6387Abstract Quantum key distribution (QKD) can provide information theoretically secure key exchange even in the era of quantum computers. However, QKD requires the classical channel to be authenticated, the current method for which is pre-sharing symmetric keys. For a QKD network of n users, this method requires $${C}_{n}^{2}=n(n-1)/2$$ C n 2 = n ( n − 1 ) / 2 pairs of symmetric keys to realize pairwise interconnection. In contrast, with the help of a mature public key infrastructure (PKI) and post-quantum cryptography (PQC) with quantum-resistant security, each user only needs to apply for one digital certificate from a certificate authority (CA) to achieve efficient and secure authentication for QKD. We need to assume only the short-term security of the PQC algorithm to achieve long-term security of the distributed keys. Here, we experimentally verified the feasibility, efficiency, and stability of the PQC algorithm in QKD authentication, and demonstrated the advantages when new users join the QKD network. Using the PQC public-key infrastructure, the nodes need to mutually trust only the CA to authenticate each other. QKD combined with PQC authentication will greatly promote and extend the application prospects of quantum-safe communication.Liu-Jun WangKai-Yi ZhangJia-Yong WangJie ChengYong-Hua YangShi-Biao TangDi YanYan-Lin TangZhen LiuYu YuQiang ZhangJian-Wei PanNature PortfolioarticlePhysicsQC1-999Electronic computers. Computer scienceQA75.5-76.95ENnpj Quantum Information, Vol 7, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
spellingShingle	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95 Liu-Jun Wang Kai-Yi Zhang Jia-Yong Wang Jie Cheng Yong-Hua Yang Shi-Biao Tang Di Yan Yan-Lin Tang Zhen Liu Yu Yu Qiang Zhang Jian-Wei Pan Experimental authentication of quantum key distribution with post-quantum cryptography
description	Abstract Quantum key distribution (QKD) can provide information theoretically secure key exchange even in the era of quantum computers. However, QKD requires the classical channel to be authenticated, the current method for which is pre-sharing symmetric keys. For a QKD network of n users, this method requires $${C}_{n}^{2}=n(n-1)/2$$ C n 2 = n ( n − 1 ) / 2 pairs of symmetric keys to realize pairwise interconnection. In contrast, with the help of a mature public key infrastructure (PKI) and post-quantum cryptography (PQC) with quantum-resistant security, each user only needs to apply for one digital certificate from a certificate authority (CA) to achieve efficient and secure authentication for QKD. We need to assume only the short-term security of the PQC algorithm to achieve long-term security of the distributed keys. Here, we experimentally verified the feasibility, efficiency, and stability of the PQC algorithm in QKD authentication, and demonstrated the advantages when new users join the QKD network. Using the PQC public-key infrastructure, the nodes need to mutually trust only the CA to authenticate each other. QKD combined with PQC authentication will greatly promote and extend the application prospects of quantum-safe communication.
format	article
author	Liu-Jun Wang Kai-Yi Zhang Jia-Yong Wang Jie Cheng Yong-Hua Yang Shi-Biao Tang Di Yan Yan-Lin Tang Zhen Liu Yu Yu Qiang Zhang Jian-Wei Pan
author_facet	Liu-Jun Wang Kai-Yi Zhang Jia-Yong Wang Jie Cheng Yong-Hua Yang Shi-Biao Tang Di Yan Yan-Lin Tang Zhen Liu Yu Yu Qiang Zhang Jian-Wei Pan
author_sort	Liu-Jun Wang
title	Experimental authentication of quantum key distribution with post-quantum cryptography
title_short	Experimental authentication of quantum key distribution with post-quantum cryptography
title_full	Experimental authentication of quantum key distribution with post-quantum cryptography
title_fullStr	Experimental authentication of quantum key distribution with post-quantum cryptography
title_full_unstemmed	Experimental authentication of quantum key distribution with post-quantum cryptography
title_sort	experimental authentication of quantum key distribution with post-quantum cryptography
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/21bd95dd2dac4e908b3d63e924c0ae0b
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Experimental authentication of quantum key distribution with post-quantum cryptography

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