Cryptanalysis and improvement of several quantum private comparison protocols

  title={Cryptanalysis and improvement of several quantum private comparison protocols},
  author={Zhaoxu Ji and Peiru Fan and Huanguo Zhang and Houzhen Wang},
  journal={Communications in Theoretical Physics},
Recently, Wu et al (2019 Int. J. Theor. Phys. 58 1854) found a serious information leakage problem in Ye and Ji’s quantum private comparison protocol (2017 Int. J. Theor. Phys. 56 1517), that is, a malicious participant can steal another’s secret data without being detected through an active attack means. In this paper, we show that Wu et al’s active attack is also effective for several other existing protocols, including the ones proposed by Ji et al and Zha et al (2016 Commun. Theor. Phys. 65… 
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