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Quantum Private Comparison of Equality with χ-Type Entangled States

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Abstract

In this paper, a quantum private comparison protocol with χ-type entangled states is proposed. In the protocol, two users can determine whether their secret inputs are equal, with the help of a semi-trusted third party. Here, the only constraint condition of this third party is that he could not collude with one user. Although the third party takes part in the whole process of the presented protocol, a feature of χ-type entangled state is utilized to design a eavesdropping check method to stand against his attack. Security analysis showed that the presented protocol is secure against some well-known attacks. Meanwhile, all the particles undergo only a one-way trip, which improves the efficiency and security of the presented protocol. Furthermore, only two-particle measurement is required in the implementation of the protocol, which make it more feasible in technique.

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Authors and Affiliations

  1. School of Mathematics and Computer Science, Fujian Normal University, Fuzhou, 350007, China

    Song Lin, Gong-De Guo & Xiao-Fen Liu

  2. Key Lab of Network Security and Cryptography, Fujian Normal University, Fuzhou, 350007, China

    Song Lin, Gong-De Guo & Xiao-Fen Liu

Authors
  1. Song Lin
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  2. Gong-De Guo
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  3. Xiao-Fen Liu
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Correspondence to Song Lin.

Additional information

This work was supported by the National Natural Science Foundation of China (grant nos. 61202451, 61202452, 61103210), the Foundation of Fujian Education Bureau (grant nos. JA12062, JA11054), a Program for Innovative Research Team in Science and Technology in Fujian Province University and a Key Project of Fujian Provincial Universities–Information Technology Research Based on Mathematics.

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Lin, S., Guo, GD. & Liu, XF. Quantum Private Comparison of Equality with χ-Type Entangled States. Int J Theor Phys 52, 4185–4194 (2013). https://doi.org/10.1007/s10773-013-1731-z

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  • DOI: https://doi.org/10.1007/s10773-013-1731-z

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