Abstract
In this paper, by using entanglement swapping of Bell states, an efficient quantum private comparison(QPC) protocol with a semi-honest party is proposed. The semi-honest third party (TP) is required to help two participants perform the comparison. She can record intermediate results and do some calculations in the whole process of the protocol execution, but she is not allowed to conspire with any participants. Moreover, TP cannot get two participants’ privacy information except the comparison results. The security analysis shows that the proposed protocol can resist both outsider attacks and insider attacks. Compared with other similar QPC protocols, the proposed one needs neither unitary operations nor the entanglement swapping of multiparticle quantum states, and it only needs the entanglement swapping of Bell states, which makes it more practical. Since three-bit classical information could be compared in each comparison, the proposed protocol has a good performance in its efficiency.
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Acknowledgments
This work is supported by the National Natural Science Foundation of China (No.62076042, No.61572086), the Key Research and Development Project of Sichuan Province (No. 2020YFG0307, No. 2018TJPT0012), the Miaozi Project of Sichuan Province (No. 2020017), the Key Research and Development Project of Chengdu (No. 2019-YF05-02028-GX), the Innovation Team of Quantum Security Communication of Sichuan Province (No.17TD0009), the Academic and Technical Leaders Training Funding Support Projects of Sichuan Province (No. 2016120080102643).
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Huang, X., Zhang, SB., Chang, Y. et al. Efficient Quantum Private Comparison Based on Entanglement Swapping of Bell States. Int J Theor Phys 60, 3783–3796 (2021). https://doi.org/10.1007/s10773-021-04915-9
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DOI: https://doi.org/10.1007/s10773-021-04915-9