Quantum Private Comparison of Equality Based on Five-Particle Cluster State |
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Authors: | Yan Chang Wen-Bo Zhang Shi-Bin Zhang Hai-Chun Wang Li-Li Yan Gui-Hua Han Zhi-Wei Sheng Yuan-Yuan Huang Wang Suo Jin-Xin Xiong |
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Affiliation: | 1. Department of Information Security Engineering, Chengdu University of Information Technology, Chengdu 610225, China;2. School of Economics, Sichuan University, Chengdu 610065, China |
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Abstract: | A protocol for quantum private comparison of equality (QPCE) is proposed based on five-particle cluster state with the help of a semi-honest third party (TP). In our protocol, TP is allowed to misbehave on its own but can not conspire with either of two parties. Compared with most two-user QPCE protocols, our protocol not only can compare two groups of private information (each group has two users) in one execution, but also compare just two private information. Compared with the multi-user QPCE protocol proposed, our protocol is safer with more reasonable assumptions of TP. The qubit efficiency is computed and analyzed. Our protocol can also be generalized to the case of 2N participants with one TP. The 2N-participant protocol can compare two groups (each group has N private information) in one execution or just N private information. |
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Keywords: | quantum private comparison of equality five-particle cluster state semi-honest third party |
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