Open-Destination Measurement-Device-Independent Quantum Key Distribution Network

Cao, Wenfei; Zhen, Yi-Zheng; Zheng, Yulin; Zhao, Shuai; Xu, Feihu; Li, Li; Chen, Zeng-Bing; Liu, Nai-Le; Chen, Kai

doi:10.3390/e22101083

“…Utilizing the experimental parameters in Table 2 [ 23 ], we obtained the simulation results shown in Figure 3 . These results show that the communication distance between each user and the GHZ-ESS can exceed 280 km using optical fibers.…”

Section: Secure Key Ratementioning

confidence: 99%

“… Secure key rate with single-photon state. The red line corresponds to the detection efficiency

of

[ 24 ], and the blue line corresponds to the detection efficiency

of

[ 23 ]. n is the number of communication users.…”

Section: Figurementioning

confidence: 99%

Multi-User Measurement-Device-Independent Quantum Key Distribution Based on GHZ Entangled State

Hua

¹

,

Hu

²

,

Guo

³

2022

Entropy

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As a multi-particle entangled state, the Greenberger–Horne–Zeilinger (GHZ) state plays an important role in quantum theory and applications. In this study, we propose a flexible multi-user measurement-device-independent quantum key distribution (MDI-QKD) scheme based on a GHZ entangled state. Our scheme can distribute quantum keys among multiple users while being resistant to detection attacks. Our simulation results show that the secure distance between each user and the measurement device can reach more than 280 km while reducing the complexity of the quantum network. Additionally, we propose a method to expand our scheme to a multi-node with multi-user network, which can further enhance the communication distance between the users at different nodes.

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“…Basic laws of quantum mechanics combined with one-time pad encryption [30] guarantee the security of multiparty quantum communication [24,31]. Currently, QCKA has been generalized to other variants both in theory [32][33][34][35][36][37][38][39][40] and experiment [41].…”

Section: Introductionmentioning

confidence: 99%

Finite-key analysis for quantum conference key agreement with asymmetric channels

Zhao

¹

,

Cao

²

,

Li

³

et al. 2021

Quantum Sci. Technol.

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As an essential ingredient of quantum networks, quantum conference key agreement (QCKA) provides unconditional secret keys among multiple parties, which enables only legitimate users to decrypt the encrypted message. Recently, some QCKA protocols employing twin-field was proposed to promote transmission distance. These protocols, however, suffer from relatively low conference key rate and short transmission distance over asymmetric channels, which demands a prompt solution in practice. Here, we consider a tripartite QCKA protocol utilizing the idea of sending-or-not-sending twin-field scheme and propose a high-efficiency QCKA over asymmetric channels by removing the symmetry parameters condition. Besides, we provide a composable finite-key analysis with rigorous security proof against general attacks by exploiting the entropic uncertainty relation for multiparty system. Our protocol greatly improves the feasibility to establish conference keys over asymmetric channels.

show abstract

“…Basic laws of quantum mechanics combined with one-time pad encryption [30] guarantee the security of multiparty quantum communication [24,31]. Currently, QCKA has been generalized to other variants both in theory [32][33][34][35][36][37][38][39][40] and experiment [41].…”

Section: Introductionmentioning

confidence: 99%

Finite-key Analysis for Quantum Conference Key Agreement with Asymmetric Channels

Li,

Cao,

Li

et al. 2021

Preprint

Self Cite

0

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As an essential ingredient of quantum networks, quantum conference key agreement (QCKA) provides unconditional secret keys among multiple parties, which enables only legitimate users to decrypt the encrypted message. Recently, some QCKA protocols employing twin-field was proposed to promote transmission distance. These protocols, however, suffer from relatively low conference key rate and short transmission distance over asymmetric channels, which demands a prompt solution in practice. Here, we consider a tripartite QCKA protocol utilizing the idea of sending-or-not-sending twin-field scheme and propose a high-efficiency QCKA over asymmetric channels by removing the symmetry parameters condition. Besides, we provide a composable finite-key analysis with rigorous security proof against general attacks by exploiting the entropic uncertainty relation for multiparty system. Our protocol greatly improves the feasibility to establish conference keys over asymmetric channels.

show abstract

Open-Destination Measurement-Device-Independent Quantum Key Distribution Network

Cited by 5 publications

References 46 publications

Multi-User Measurement-Device-Independent Quantum Key Distribution Based on GHZ Entangled State

Multi-User Measurement-Device-Independent Quantum Key Distribution Based on GHZ Entangled State

Finite-key analysis for quantum conference key agreement with asymmetric channels

Finite-key Analysis for Quantum Conference Key Agreement with Asymmetric Channels

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