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Quantum Cryptography Security

Cryptanalysis and improvement of a semi-quantum private comparison protocol based on Bell states

arXiv
Authors: Li Xie, Qin Li, Fang Yu, Xiaoping Lou, Cai Zhang

Year

2020

Paper ID

512

Status

Preprint

Abstract Read

~2 min

Abstract Words

127

Citations

N/A

Abstract

Semi-quantum private comparison (SQPC) allows two participants with limited quantum ability to securely compare the equality of their secrets with the help of a semi-dishonest third party (TP). Recently, Jiang proposed a SQPC protocol based on Bell states (Quantum Inf Process 19(6): 180, 2020) and claimed it is secure. In this paper, we present two types of attack on Jiang's SQPC protocol. In the first type of attack, an outside eavesdropper will make participants accept a wrong result. In the second type of attack, a malicious participant will not only make the other participant accept a wrong result, but also learn the secret of the honest participant. Neither type of attack will be detected. In addition, we propose an improved SQPC protocol that can resist these two types of attack.

Why This Paper Matters

  • This paper contributes to the Quantum Cryptography & Security research area in the Quantum Articles archive.
  • It adds a 2020 reference point for readers tracking recent quantum research.
  • Semi-quantum private comparison (SQPC) allows two participants with limited quantum ability to securely compare the equality of their secrets with the help of a semi-dishonest...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2012.13851 [2] arXiv https://arxiv.org/abs/2012.13851 [3] Publisher https://arxiv.org/abs/2012.13851

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