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A Protocol for the Quantum Private Comparison of Equality with χ-Type State

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Abstract

We present a new quantum protocol for comparing the equal information with the help of a semi-honest third party (TP). Different from previous protocols, we utilize the four-particle χ-type states as the information carriers. Various kinds of outside attacks and participant attacks are discussed in detail. One party cannot learn the other’s private information. The TP cannot learn any information about the private information, even about the comparison result or the length of secret inputs.

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Authors and Affiliations

  1. School of Computer Science, Communication University of China, Beijing, 100024, China

    Wen Liu, Yong-Bin Wang, Zheng-Tao Jiang & Yi-Zhen Cao

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  1. Wen Liu
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  2. Yong-Bin Wang
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  3. Zheng-Tao Jiang
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  4. Yi-Zhen Cao
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Correspondence to Wen Liu.

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Liu, W., Wang, YB., Jiang, ZT. et al. A Protocol for the Quantum Private Comparison of Equality with χ-Type State. Int J Theor Phys 51, 69–77 (2012). https://doi.org/10.1007/s10773-011-0878-8

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  • DOI: https://doi.org/10.1007/s10773-011-0878-8

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