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Comment on the “Quantum Private Comparison Protocol Based on Bell Entangled States”

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Abstract

Recently, Liu et al. proposed a quantum private comparison (QPC) based on Bell entangled states (Liu et al. in Commun. Theor. Phys. 57(4): 583, 2012). This paper points out a security loophole in Liu et al.’s protocol, in which the third party can disclose the private information of both users. In addition, an improvement is proposed to avoid the loophole.

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Acknowledgement

We would like to thank the National Science Council of Republic of China for financial support of this research under Contract No. NSC 100-2221-E-006-152-MY3 and No. NSC 101-2221-E-006-266-.

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Authors and Affiliations

  1. Department of Computer Science and Information Engineering, National Cheng Kung University, No. 1, University Rd., Tainan City, 70101, Taiwan, ROC

    Yu-Ting Chen & Tzonelih Hwang

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  1. Yu-Ting Chen
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  2. Tzonelih Hwang
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Correspondence to Tzonelih Hwang.

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Chen, YT., Hwang, T. Comment on the “Quantum Private Comparison Protocol Based on Bell Entangled States”. Int J Theor Phys 53, 837–840 (2014). https://doi.org/10.1007/s10773-013-1872-0

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  • DOI: https://doi.org/10.1007/s10773-013-1872-0

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