Feasible attack on detector-device-independent quantum key distribution

Abstract Recently, to bridge the gap between security of Measurement-device-independent quantum key distribution (MDI-QKD) and a high key rate, a novel protocol, the so-called detector-device-independent QKD (DDI-QKD), has been independently proposed by several groups and has attracted great interes...

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Autores principales:	Kejin Wei, Hongwei Liu, Haiqiang Ma, Xiuqing Yang, Yong Zhang, Yongmei Sun, Jinghua Xiao, Yuefeng Ji
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/78fb786e2cac45718b6dcea013a730ed
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spelling	oai:doaj.org-article:78fb786e2cac45718b6dcea013a730ed2021-12-02T16:06:34ZFeasible attack on detector-device-independent quantum key distribution10.1038/s41598-017-00531-y2045-2322https://doaj.org/article/78fb786e2cac45718b6dcea013a730ed2017-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00531-yhttps://doaj.org/toc/2045-2322Abstract Recently, to bridge the gap between security of Measurement-device-independent quantum key distribution (MDI-QKD) and a high key rate, a novel protocol, the so-called detector-device-independent QKD (DDI-QKD), has been independently proposed by several groups and has attracted great interest. A higher key rate is obtained, since a single photon bell state measurement (BSM) setup is applied to DDI-QKD. Subsequently, Qi has proposed two attacks for this protocol. However, the first attack, in which Bob’s BSM setup is assumed to be completely a “black box”, is easily prevented by using some additional monitoring devices or by specifically characterizing the BSM. The second attack, which combines the blinding attack and the detector wavelength-dependent efficiency, is not explicitly discussed, and its feasibility is not experimentally confirmed. Here, we show that the second attack is not technically viable because of an intrinsically wavelength-dependent property of a realistic beam splitter, which is an essential component in DDI-QKD. Moreover, we propose a feasible attack that combines a well-known attack—detector blinding attack with intrinsic imperfections of single-photon detectors. The experimental measurement and proof-of-principle test results confirm that our attack can allow Eve to get a copy of quantum keys without being detected and that it is feasible with current technology.Kejin WeiHongwei LiuHaiqiang MaXiuqing YangYong ZhangYongmei SunJinghua XiaoYuefeng JiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kejin Wei Hongwei Liu Haiqiang Ma Xiuqing Yang Yong Zhang Yongmei Sun Jinghua Xiao Yuefeng Ji Feasible attack on detector-device-independent quantum key distribution
description	Abstract Recently, to bridge the gap between security of Measurement-device-independent quantum key distribution (MDI-QKD) and a high key rate, a novel protocol, the so-called detector-device-independent QKD (DDI-QKD), has been independently proposed by several groups and has attracted great interest. A higher key rate is obtained, since a single photon bell state measurement (BSM) setup is applied to DDI-QKD. Subsequently, Qi has proposed two attacks for this protocol. However, the first attack, in which Bob’s BSM setup is assumed to be completely a “black box”, is easily prevented by using some additional monitoring devices or by specifically characterizing the BSM. The second attack, which combines the blinding attack and the detector wavelength-dependent efficiency, is not explicitly discussed, and its feasibility is not experimentally confirmed. Here, we show that the second attack is not technically viable because of an intrinsically wavelength-dependent property of a realistic beam splitter, which is an essential component in DDI-QKD. Moreover, we propose a feasible attack that combines a well-known attack—detector blinding attack with intrinsic imperfections of single-photon detectors. The experimental measurement and proof-of-principle test results confirm that our attack can allow Eve to get a copy of quantum keys without being detected and that it is feasible with current technology.
format	article
author	Kejin Wei Hongwei Liu Haiqiang Ma Xiuqing Yang Yong Zhang Yongmei Sun Jinghua Xiao Yuefeng Ji
author_facet	Kejin Wei Hongwei Liu Haiqiang Ma Xiuqing Yang Yong Zhang Yongmei Sun Jinghua Xiao Yuefeng Ji
author_sort	Kejin Wei
title	Feasible attack on detector-device-independent quantum key distribution
title_short	Feasible attack on detector-device-independent quantum key distribution
title_full	Feasible attack on detector-device-independent quantum key distribution
title_fullStr	Feasible attack on detector-device-independent quantum key distribution
title_full_unstemmed	Feasible attack on detector-device-independent quantum key distribution
title_sort	feasible attack on detector-device-independent quantum key distribution
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/78fb786e2cac45718b6dcea013a730ed
work_keys_str_mv	AT kejinwei feasibleattackondetectordeviceindependentquantumkeydistribution AT hongweiliu feasibleattackondetectordeviceindependentquantumkeydistribution AT haiqiangma feasibleattackondetectordeviceindependentquantumkeydistribution AT xiuqingyang feasibleattackondetectordeviceindependentquantumkeydistribution AT yongzhang feasibleattackondetectordeviceindependentquantumkeydistribution AT yongmeisun feasibleattackondetectordeviceindependentquantumkeydistribution AT jinghuaxiao feasibleattackondetectordeviceindependentquantumkeydistribution AT yuefengji feasibleattackondetectordeviceindependentquantumkeydistribution
_version_	1718384969922904064

Feasible attack on detector-device-independent quantum key distribution

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