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Cryptanalysis and Improvement of Ye et al’s Quantum Private Comparison Protocol

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Abstract

Recently, Ye et al. (Int. J. Theor. Phys. 56, 1517–1529, 2017) proposed a quantum private comparison (QPC) protocol based on five-qubit entanglement state. Two parties can verify that their secret information is equal or not with the help of the semi-honest third party (TP). However, in this paper we will point out the Ye et al.’s initial protocol is not safe under a special participant attack. That is a malicious participant can get the other party’s secret input information illegally under the forgery attack. Furthermore, we give two possible improvement protocols, which can perform this protocol secure against this kind of attack.

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Acknowledgments

The authors are supported by the National Natural Science Foundation of China under Grant Nos. 11725524, 61471356, Major State Basic Research Development Program of China Nos. 2014CB340600, Natural Science Foundation of HeBei Province Nos. F2017201199, Science and technology research project of Hebei higher education Nos. QN2017020.

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Authors and Affiliations

  1. School of Cyber Security and Computers, Hebei University, Baoding, 071002, People’s Republic of China

    WanQing Wu

  2. State Key Laboratory of Magnetic Resonances and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, 430071, People’s Republic of China

    WanQing Wu & QingYu Cai

  3. College of Computer Science and Engineering, Shijiazhuang University, Shijiazhuang, 050035, People’s Republic of China

    ShuoMei Wu

  4. Computer School of Wuhan University, Wuhan, 430072, People’s Republic of China

    HuanGuo Zhang

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  1. WanQing Wu
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  2. QingYu Cai
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  3. ShuoMei Wu
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Correspondence to WanQing Wu.

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Wu, W., Cai, Q., Wu, S. et al. Cryptanalysis and Improvement of Ye et al’s Quantum Private Comparison Protocol. Int J Theor Phys 58, 1854–1860 (2019). https://doi.org/10.1007/s10773-019-04080-0

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