Continuous-variable measurement-device-independent quantum key distribution

Li, Zhengyu; Zhang, Yichen; Xu, Feihu; Peng, Xiang; Guo, Hong

doi:10.1103/physreva.89.052301

Cited by 193 publications

(178 citation statements)

References 48 publications

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“…The equivalence between the EB scheme of the CV-MDI QKD protocol and the PM scheme has been proven in Ref. [24], and the EB scheme of the CV-MDI QKD protocol is shown in Fig. 2.…”

Section: Cv-mdi Qkd Protocol and Parameter Estimationmentioning

confidence: 99%

“…In 2012, Jouguet et al [28] researched the finitesize effect of CV-QKD protocol on the secret key rate in the case of practical detections. So far, the security of the CV-MDI QKD protocol in the asymptotic scenario has been demonstrated [24,25,[29][30][31]. But the feasibility of CV-MDI QKD protocol under finite-size effect has not yet been confirmed.…”

Section: Introductionmentioning

confidence: 99%

“…To calculate the secret key rate of the CV-MDI QKD protocol, the researchers proposed two calculation methods [24,25]: One is the secret key rate formula based on entanglement swapping. That is, assuming that Bob's EPR state preparation and displacement operations are regarded as manipulated by Eve in Fig.…”

Section: Cv-mdi Qkd Protocol and Parameter Estimationmentioning

confidence: 99%

“…These attacks use the detector's imperfect characteristics to operate the detector results to reduce the * zhangyc@bupt.edu.cn † yusong@bupt.edu.cn additional noise variance, so that Alice and Bob estimate the secret key rate too high, resulting in security risks. For this reason, continuous-variable measurementdevice-independent (CV-MDI) protocol has been proposed [24,25]. Since the measurement part of the protocol is completely committed by an untrusted third party, the security of the protocol does not depend on the security of the detector.…”

Section: Introductionmentioning

confidence: 99%

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Finite-size analysis of continuous-variable measurement-device-independent quantum key distribution

Zhang

Zhao

et al. 2017

Phys. Rev. A

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We study the impact of the finite-size effect on the continuous-variable measurement-deviceindependent quantum key distribution (CV-MDI QKD) protocol, mainly considering the finite-size effect on the parameter estimation procedure. The central-limit theorem and maximum likelihood estimation theorem are used to estimate the parameters. We also analyze the relationship between the number of exchanged signals and the optimal modulation variance in the protocol. It is proved that when Charlie's position is close to Bob, the CV-MDI QKD protocol has the farthest transmission distance in the finite-size scenario. Finally, we discuss the impact of finite-size effects related to the practical detection in the CV-MDI QKD protocol. The overall results indicate that the finitesize effect has a great influence on the secret key rate of the CV-MDI QKD protocol and should not be ignored.

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“…The equivalence between the EB scheme of the CV-MDI QKD protocol and the PM scheme has been proven in Ref. [24], and the EB scheme of the CV-MDI QKD protocol is shown in Fig. 2.…”

Section: Cv-mdi Qkd Protocol and Parameter Estimationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Cv-mdi Qkd Protocol and Parameter Estimationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Finite-size analysis of continuous-variable measurement-device-independent quantum key distribution

Zhang

Zhao

et al. 2017

Phys. Rev. A

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“…In this paper, we introduce the use of squeezed states into a recently proposed protocol, the continuous-variable measurement-device-independent QKD (CV-MDI QKD) protocol [21,22]. The MDI-QKD protocol [23][24][25] was first proposed to defend detector side channels.…”

Section: Introductionmentioning

confidence: 99%

Continuous-variable measurement-device-independent quantum key distribution using squeezed states

Zhang

et al. 2014

Phys. Rev. A

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107

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A continuous-variable measurement-device-independent quantum key distribution (CV-MDI QKD) protocol using squeezed states is proposed where the two legitimate partners send Gaussian-modulated squeezed states to an untrusted third party to realize the measurement. Security analysis shows that the protocol can not only defend all detector side channels, but also attain higher secret key rates than the coherent-state-based protocol. We also present a method to improve the squeezed-state CV-MDI QKD protocol by adding proper Gaussian noise to the reconciliation side. It is found that there is an optimal added noise to optimize the performance of the protocol in terms of both key rates and maximal transmission distances. The resulting protocol shows the potential of long-distance secure communication using the CV-MDI QKD protocol.

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Plug‐and‐Play Continuous Variable Measurement‐Device‐Independent Quantum Key Distribution

et al. 2023

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In this paper, a continuous variable (CV) measurement‐device‐independent (MDI) quantum key distribution (QKD) protocol using Gaussian modulated coherent states is proposed. The MDI is first proposed to resist the attacks on the detection equipment by introducing an untrusted relay. However, the necessity of propagation of local oscillator between legitimate users and the relay makes the implementation of CV‐MDI‐QKD highly impractical. By introducing the plug‐and‐play (P&P) technique into CV‐MDI‐QKD, the problems of polarization drifts caused by environmental disturbance and the security loopholes during the local oscillator transmission are solved naturally. The proposed scheme is superior to the previous CV‐MDI‐QKD protocol on the aspect of implementation. The security bounds of the P&P CV‐MDI‐QKD under the Gaussian collective attack are analyzed. It is believed that the technique presented in this paper can be extended to quantum network.

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Continuous-variable measurement-device-independent quantum key distribution

Cited by 193 publications

References 48 publications

Finite-size analysis of continuous-variable measurement-device-independent quantum key distribution

Finite-size analysis of continuous-variable measurement-device-independent quantum key distribution

Continuous-variable measurement-device-independent quantum key distribution using squeezed states

Plug‐and‐Play Continuous Variable Measurement‐Device‐Independent Quantum Key Distribution

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