Cryptanalysis and improvement of the quantum private comparison protocol based on Bell entangled states
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2014
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| _version_ | 1866909183184470016 |
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| author | Liu, Wen-Jie Liu, Chao Zheng, Yu Chen, Zheng-Fei |
| author_facet | Liu, Wen-Jie Liu, Chao Zheng, Yu Chen, Zheng-Fei |
| contents | Recently, Liu et al. [Commun. Theor. Phys. 57, 583, 2012] proposed a quantum private comparison protocol based on entanglement swapping of Bell states, which aims to securely compare the equality of two participants' information with the help of a semi-honest third party (TP). However, this study points out there is a fatal loophole in this protocol, i.e., TP can obtain all of the two participants secret inputs without being detected through making a specific Bell-basis measurement. To fix the problem, a simple solution, which uses one-time eavesdropper checking with decoy photons instead of twice eavesdropper checking with Bell states, is demonstrated. Compared with the original protocol, it also reduces the Bell states consumption and simplifies the steps in the protocol. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_1405_6455 |
| institution | arXiv |
| publishDate | 2014 |
| record_format | arxiv |
| spellingShingle | Cryptanalysis and improvement of the quantum private comparison protocol based on Bell entangled states Liu, Wen-Jie Liu, Chao Zheng, Yu Chen, Zheng-Fei Quantum Physics Recently, Liu et al. [Commun. Theor. Phys. 57, 583, 2012] proposed a quantum private comparison protocol based on entanglement swapping of Bell states, which aims to securely compare the equality of two participants' information with the help of a semi-honest third party (TP). However, this study points out there is a fatal loophole in this protocol, i.e., TP can obtain all of the two participants secret inputs without being detected through making a specific Bell-basis measurement. To fix the problem, a simple solution, which uses one-time eavesdropper checking with decoy photons instead of twice eavesdropper checking with Bell states, is demonstrated. Compared with the original protocol, it also reduces the Bell states consumption and simplifies the steps in the protocol. |
| title | Cryptanalysis and improvement of the quantum private comparison protocol based on Bell entangled states |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/1405.6455 |