Quantum Private Comparison Based on Four-Particle Cluster State

被引:2
|
作者
Hou, Min [1 ,2 ]
Wu, Yue [1 ]
机构
[1] Sichuan Univ, Sch Comp Sci, Jinjiang Coll, Meishan 620860, Peoples R China
[2] Univ Elect Sci & Technol China, Network Data Secur Key Lab Sichuan Prov, Chengdu 610054, Peoples R China
来源
APPLIED SCIENCES-BASEL | 2024年 / 14卷 / 22期
关键词
quantum private comparison (QPC); entanglement correlation; bit flip; phase shift; four-particle cluster state; efficiency; COMPARISON PROTOCOL;
D O I
10.3390/app142210759
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A quantum private comparison (QPC) protocol enables two parties to securely compare their private data without disclosing the actual values to one another, utilizing quantum mechanics to maintain confidentiality. Many current QPC protocols mainly concentrate on comparing the equality of private information between two users during a single execution, which restricts their scalability. To overcome this limitation, we present an efficient QPC protocol aimed at evaluating the equality of private information between two groups of users in one execution. This is achieved by leveraging the entanglement correlations present in each particle of a four-particle cluster state. In our approach, users encode their private data using bit flip or phase shift operators on the quantum sequence they receive, which is then sent back to a semi-trusted party which then determines whether the secrets of the two groups are equal and communicates the results to the users. By employing this method and facilitating the distributed transmission of the quantum sequence, our protocol achieves a qubit efficiency of 50%. Security analyses reveal that neither external attacks nor insider threats can successfully compromise the confidentiality of private data.
引用
收藏
页数:11
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