This paper presents a quantum private comparison (QPC) protocol based on Bell states. The proposed QPC protocol can secretly compare information of the two participants without the help of a third party (TP). The proposed protocol employs some decoy state photons and quantum SWAP gates to resist various outside attacks and internal attacks. This paper compares the presented quantum private comparison (QPC) protocol with other schemes in terms of different indicators. The results show that the proposed protocol has some advantages different from previous protocols.
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The authors are supported by the Natural Science Foundation of HeBei Province Nos. F2017201199.
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Wu, W., Ma, X. Quantum Private Comparison Protocol without a Third Party. Int J Theor Phys 59, 1854–1865 (2020). https://doi.org/10.1007/s10773-020-04453-w
- Quantum cryptography
- Quantum private comparison
- Bell states