Quantum Conference Key Agreement: A Review

Murta, Gláucia; Grasselli, Federico; Kampermann, Hermann

doi:10.1002/qute.202000025

Cited by 89 publications

(61 citation statements)

References 139 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We envision that our method can be a reference standard for QKD scientists. In future work, we hope to extend our method to other realistic factors or scenarios, such as the finite-key analysis [51,52] and high-dimensional conference key agreement protocols [53]. Furthermore, our analysis may be instructive for other different types of asymmetric structure [54,55].…”

Section: Conclusion and Discussionmentioning

confidence: 97%

Security analysis method for practical quantum key distribution with arbitrary encoding schemes

Chang,

Wang,

Wang

et al. 2021

Preprint

View full text Add to dashboard Cite

Quantum key distribution (QKD) gradually has become a crucial element of practical secure communication. In different scenarios, the security analysis of genuine QKD systems is complicated. A universal secret key rate calculation method, used for realistic factors such as multiple degrees of freedom encoding, asymmetric protocol structures, equipment flaws, environmental noise, and so on, is still lacking. Based on the correlations of statistical data, we propose a security analysis method without restriction on encoding schemes. This method makes a trade-off between applicability and accuracy, which can effectively analyze various existing QKD systems. We illustrate its ability by analyzing source flaws and a high-dimensional asymmetric protocol. Results imply that our method can give tighter bounds than the Gottesman-Lo-Lütkenhaus-Preskill (GLLP) analysis and is beneficial to analyze protocols with complex encoding structures. Our work has the potential to become a reference standard for the security analysis of practical QKD.

show abstract

Section: Conclusion and Discussionmentioning

confidence: 97%

Security analysis method for practical quantum key distribution with arbitrary encoding schemes

Chang,

Wang,

Wang

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…After more than two decades of development, many quantum CKA protocols have been proposed [7][8][9][10][11][12][13][14][15][16][17][18][19][20], including measurementdevice-independent [8] and device-independent [15] protocols. Details can be found in the review article [21].…”

Section: Introductionmentioning

confidence: 99%

Coherent one-way quantum conference key agreement based on twin field

Cao

et al. 2021

New J. Phys.

View full text Add to dashboard Cite

Quantum conference key agreement (CKA) enables key sharing among multiple trusted users with information-theoretic security. Currently, the key rates of most quantum CKA protocols suffer from the limit of the total efficiency among quantum channels. Inspired by the coherent one-way and twin-field quantum key distribution (QKD) protocols, we propose a quantum CKA protocol of three users. Exploiting coherent states with intensity 0 and µ to encode logic bits, our protocol can break the limit. Additionally, the requirements of phase randomization and multiple intensity modulation are removed in our protocol, making its experimental demonstration simple.

show abstract

“…Quantum CKA has been a research hot topic [6]. At the very beginning, it enables multiple users to share the conference key with information-theoretic security by employing multipartite entanglement [7]- [9].…”

Section: Introductionmentioning

confidence: 99%

High Key Rate Quantum Conference Key Agreement With Unconditional Security

Cao

Zhao

et al. 2021

IEEE Access

View full text Add to dashboard Cite

Quantum cryptography is a major ingredient of the future quantum internet that promises various secure communication tasks. Quantum conference key agreement (CKA) is an important cryptographic primitive of quantum cryptography, which provides the conference key among multiple users simultaneously. However, quantum CKA is currently far from practical application due to the low conference key rate. Here, we propose a quantum CKA protocol of three users with information-theoretic security. Our protocol only requires phase-randomized weak coherent sources and threshold single-photon detectors, and is anticipated to be experimentally demonstrated over 600 km under current technology. Our scheme can be widely implemented in the approaching large-scale quantum network.

show abstract

Quantum Conference Key Agreement: A Review

Cited by 89 publications

References 139 publications

Security analysis method for practical quantum key distribution with arbitrary encoding schemes

Security analysis method for practical quantum key distribution with arbitrary encoding schemes

Coherent one-way quantum conference key agreement based on twin field

High Key Rate Quantum Conference Key Agreement With Unconditional Security

Contact Info

Product

Resources

About