Abstract
Zhou et al. (Int. J. Theor. Phys. 59, 663-676 2020) introduced a three-party semi-quantum key agreement protocol utilizing four-qubit cluster states. However, we found it has security vulnerabilities, quantum resource wastage, and limitations on the number of participants. To address these concerns, we propose an improved protocol using GHZ-like states, which can resist double C-Not attack and conserve quantum resources. Additionally, we extend the improved scheme to multiparty key agreement in circle-type, which offers high efficiency and is well-suited for flexible dynamic networks.
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Acknowledgements
This work was supported by Project of Natural Science Foundation of Hunan Province (2021JJ30454), Scientific research Project of Education Department of Hunan Province (22A0049, 22B0699).
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Xu, X., Lou, X. Improvement and Flexible Multiparty Extension of Semi-Quantum Key Agreement Protocol. Int J Theor Phys 62, 252 (2023). https://doi.org/10.1007/s10773-023-05504-8
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DOI: https://doi.org/10.1007/s10773-023-05504-8