Cryptanalysis and Improvement of the Multi-User QPCE Protocol with Semi-Honest Third Party

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 pa...

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Bibliographic Details
Published in:Chinese physics letters 2016, Vol.33 (1), p.1-5
Main Author: 昌燕 许春香 张仕斌 王海春 闫丽丽 韩贵华 黄源源 盛志伟
Format: Article
Language:English
Subjects:
Cryptography
保密
协议
多用户
安全性
攻击
私人信息
第三方
量子信息处理
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Summary: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.
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/33/1/010301