Cryptanalysis and Improvement of the Multi-User QPCE Protocol with Semi-Honest Third Party
1 Department of Computer Science and Technology, University of Electronic Science and Technology of China, Chengdu 611731
2 College of Information Engineering, Chengdu University of Information Technology, Chengdu 610225
Received Date:
September 06, 2015
Revised Date:
December 21, 2015
Published Date:
December 21, 2015
Abstract
In a recent work [Quantum Inf. Process 12 (2013) 1077], a multi-user protocol of quantum private comparison of equality (QPCE) is presented. Here we point out that if we relax the constraint of a semi-honest third party, the private information of the users will be totally leaked out to the third party. A special attack is demonstrated in detail. Furthermore, a possible improvement is proposed, which makes the protocol secure against this kind of attack.
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About This Article
Cite this article:
Yan Chang, Chun-Xiang Xu, Shi-Bin Zhang, Hai-Chun Wang, Li-Li Yan, Gui-Hua Han, Yuan-Yuan Huang, Zhi-Wei Sheng. Cryptanalysis and Improvement of the Multi-User QPCE Protocol with Semi-Honest Third Party[J].
Chin. Phys. Lett. , 2016, 33(1): 010301.
DOI: 10.1088/0256-307X/33/1/010301
Yan Chang, Chun-Xiang Xu, Shi-Bin Zhang, Hai-Chun Wang, Li-Li Yan, Gui-Hua Han, Yuan-Yuan Huang, Zhi-Wei Sheng. Cryptanalysis and Improvement of the Multi-User QPCE Protocol with Semi-Honest Third Party[J]. Chin. Phys. Lett. , 2016, 33(1): 010301. DOI: 10.1088/0256-307X/33/1/010301
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