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Quantum private comparison protocol based on entanglement swapping of \(d\)-level Bell states

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Abstract

In this paper, we propose a quantum private comparison protocol based on entanglement swapping, where two distrustful parties can compare the values of their secrets with the help of a semi-trusted third party. The protocol can determine not only whether two secrets are equal, but also the size relationship between them. The two parties can deduce the comparison result based on the keys shared between them and the announcement of the third party. Others including the third party will learn nothing about the values of the secrets, as well as the comparison result. The security of our protocol is analyzed. Furthermore, all the particles can be reused in the same protocol model theoretically. So our protocol is efficient and feasible to expand in network service, which in turn gives a solution to the left problem in Lin et al. (Quantum Inf Process, doi:10.1007/s11128-012-0395-6, 2012).

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Acknowledgments

This work is supported by NSFC (Grant Nos. 61272057, 61170270, 61100203, 61003286, 61121061), NCET (Grant No. NCET-10-0260), SRFDP (Grant No. 20090005110010), Beijing Natural Science Foundation (Grant Nos. 4112040, 4122054), the Fundamental Research Funds for the Central Universities (Grant No. 2011YB01, 2012RC0710).

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Authors and Affiliations

  1. School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876, China

    Fen Zhuo Guo & Jie Zhang

  2. State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing, 100876, China

    Fen Zhuo Guo, Fei Gao, Su Juan Qin, Jie Zhang & Qiao Yan Wen

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  1. Fen Zhuo Guo
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  2. Fei Gao
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  3. Su Juan Qin
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  4. Jie Zhang
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  5. Qiao Yan Wen
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Correspondence to Fen Zhuo Guo.

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Guo, F.Z., Gao, F., Qin, S.J. et al. Quantum private comparison protocol based on entanglement swapping of \(d\)-level Bell states. Quantum Inf Process 12, 2793–2802 (2013). https://doi.org/10.1007/s11128-013-0536-6

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  • DOI: https://doi.org/10.1007/s11128-013-0536-6

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