Measurement-device-independent quantum key distribution for nonstandalone networks

Guan-Jie Fan-Yuan; Feng-Yu Lu; Shuang Wang; Zhen-Qiang Yin; De-Yong He; Zheng Zhou; Jun Teng; Wei Chen; Guang-Can Guo; Zheng-Fu Han

doi:10.1364/PRJ.428309

Journals >Photonics Research >Volume 9 >Issue 10 >Page 1881 > Article

Photonics Research
Vol. 9, Issue 10, 1881 (2021)

Measurement-device-independent quantum key distribution for nonstandalone networks | Editors' Pick

Guan-Jie Fan-Yuan^1,2,3, Feng-Yu Lu^1,2,3, Shuang Wang^1,2,3,*, Zhen-Qiang Yin^1,2,3..., De-Yong He^1,2,3, Zheng Zhou^1,2,3, Jun Teng^1,2,3, Wei Chen^1,2,3, Guang-Can Guo^1,2,3 and Zheng-Fu Han^1,2,3|Show fewer author(s)

Author Affiliations

¹CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China

²CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China

³State Key Laboratory of Cryptology, Beijing 100878, China

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DOI: 10.1364/PRJ.428309 Cite this Article Set citation alerts

Guan-Jie Fan-Yuan, Feng-Yu Lu, Shuang Wang, Zhen-Qiang Yin, De-Yong He, Zheng Zhou, Jun Teng, Wei Chen, Guang-Can Guo, Zheng-Fu Han, "Measurement-device-independent quantum key distribution for nonstandalone networks," Photonics Res. 9, 1881 (2021) Copy Citation Text

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Abstract

Untrusted node networks initially implemented by measurement-device-independent quantum key distribution (MDI-QKD) protocol are a crucial step on the roadmap of the quantum Internet. Considering extensive QKD implementations of trusted node networks, a workable upgrading tactic of existing networks toward MDI networks needs to be explicit. Here, referring to the nonstandalone (NSA) network of 5G, we propose an NSA-MDI scheme as an evolutionary selection for existing phase-encoding BB84 networks. Our solution can upgrade the BB84 networks and terminals that employ various phase-encoding schemes to immediately support MDI without hardware changes. This cost-effective upgrade effectively promotes the deployment of MDI networks as a step of untrusted node networks while taking full advantage of existing networks. In addition, the diversified demands on security and bandwidth are satisfied, and network survivability is improved.

Q_{ι_{a} ι_{b}}^{X} |_{θ_{a} = θ_{b}} = \frac{ι_{a} ι_{b}}{2}, Q_{ι_{a} ι_{b}}^{X} |_{θ_{a} \neq θ_{b}} = 0, E_{ι_{a} ι_{b}}^{X} = \frac{Q^{X} |_{θ_{a} \neq θ_{b}}}{Q^{X} |_{θ_{a} = θ_{b}} + Q^{X} |_{θ_{a} \neq θ_{b}}} = 0, Q_{ι_{a} ι_{b}}^{Y} |_{θ_{a} = θ_{b}} = \frac{{(ι_{a} + ι_{b})}^{2} - 2 ι_{a} ι_{b}}{8}, Q_{ι_{a} ι_{b}}^{Y} |_{θ_{a} \neq θ_{b}} = \frac{{(ι_{a} + ι_{b})}^{2} + 2 ι_{a} ι_{b}}{8}, E_{ι_{a} ι_{b}}^{Y} = \frac{Q^{Y} |_{θ_{a} = θ_{b}}}{Q^{Y} |_{θ_{a} = θ_{b}} + Q^{Y} |_{θ_{a} \neq θ_{b}}} = \frac{ι_{a}^{2} + ι_{b}^{2}}{2 {(ι_{a} + ι_{b})}^{2}} \overset{ι_{a} = ι_{b}}{=} \frac{1}{4} .

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