Cryptanalysis and Improvement of the Multi-User QPCE Protocol with Semi-Honest Third Party
Yan Chang1,2** , Chun-Xiang Xu1 , Shi-Bin Zhang2 , Hai-Chun Wang2 , Li-Li Yan2 , Gui-Hua Han2 , Yuan-Yuan Huang2 , Zhi-Wei Sheng2
1 Department of Computer Science and Technology, University of Electronic Science and Technology of China, Chengdu 6117312 College of Information Engineering, Chengdu University of Information Technology, Chengdu 610225
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.
收稿日期: 2015-09-07
出版日期: 2016-01-29
:
03.67.Dd
(Quantum cryptography and communication security)
03.67.Hk
(Quantum communication)
03.67.Pp
(Quantum error correction and other methods for protection against decoherence)
引用本文:
. [J]. 中国物理快报, 2016, 33(01): 10301-010301.
链接本文:
https://cpl.iphy.ac.cn/CN/10.1088/0256-307X/33/1/010301
或
https://cpl.iphy.ac.cn/CN/Y2016/V33/I01/10301
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2016, Vol. 33 
