A Novel Semi-Quantum Private Comparison Scheme Using Bell Entangle States  

作　　者：Yuhua Sun Lili Yan Zhibin Sun Shibin Zhang Jiazhong Lu 

机构地区：[1]School of Cybersecurity,Chengdu University of Information Technology,Chengdu,610225,China [2]Natural Resource Ecology Laboratory,Colorado State University,Fort Collins,CO 80523,USA

出　　处：《Computers, Materials & Continua》2021年第3期2385-2395,共11页计算机、材料和连续体（英文）

基　　金：the National Natural Science Foundation of China(Grant Nos.61402058,61572086);Major Project of Education Department in Sichuan(Grant No.18ZA0109);Web Culture Project Sponsored by the Humanities and Social Science Research Base of the Sichuan Provincial Education Department(Grant No.WLWH18-22).

摘　　要：Private comparison is the basis of many encryption technologies,and several related Quantum Private Comparison(QPC)protocols have been published in recent years.In these existing protocols,secret information is encoded by using conjugate coding or orthogonal states,and all users are quantum participants.In this paper,a novel semi-quantum private comparison scheme is proposed,which employs Bell entangled states as quantum resources.Two semi-quantum participants compare the equivalence of their private information with the help of a semi-honest third party(TP).Compared with the previous classical protocols,these two semi-quantum users can only make some particular action,such as to measure,prepare and reflect quantum qubits only in the classical basis fj0i;j1ig,and TP needs to perform Bell basis measurement on reflecting qubits to obtain the results of the comparison.Further,analysis results show that this scheme can avoid outside and participant attacks and its’qubit efficiency is better than the other two protocols mentioned in the paper.

关 键 词：CRYPTOGRAPHY Bell entangled states a semi-honest TP security analysis semi-quantum private comparison 

分 类 号：O41[理学—理论物理]