Efficient quantum private comparison protocol based on one direction discrete quantum walks on the circle  

作　　者：Jv-Jie Wang Zhao Dou Xiu-Bo Chen Yu-Ping Lai Jian Li 王莒杰;窦钊;陈秀波;赖裕平;李剑(Information Security Center,State Key Laboratory of Networking and Switching Technology,Beijing University of Posts and Telecommunications,Beijing 100876,China;Information Security Center,School of Cyberspace Security,Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]Information Security Center,State Key Laboratory of Networking and Switching Technology,Beijing University of Posts and Telecommunications,Beijing 100876,China [2]Information Security Center,School of Cyberspace Security,Beijing University of Posts and Telecommunications,Beijing 100876,China

出　　处：《Chinese Physics B》2022年第5期150-156,共7页中国物理B（英文版）

基　　金：Project supported by the National Key R&D Program of China(Grant No.2020YFB1805405);the 111 Project(Grant No.B21049);the Foundation of Guizhou Provincial Key Laboratory of Public Big Data(Grant No.2019BDKFJJ014);the Fundamental Research Funds for the Central Universities,China(Grant No.2020RC38)。

摘　　要：We propose an efficient quantum private comparison protocol firstly based on one direction quantum walks.With the help of one direction quantum walk,we develop a novel method that allows the semi-honest third party to set a flag to judge the comparing result,which improves the qubit efficiency and the maximum quantity of the participants’secret messages.Besides,our protocol can judge the size of the secret messages,not only equality.Furthermore,the quantum walks particle is disentangled in the initial state.It only requires a quantum walks operator to move,making our proposed protocol easy to implement and reducing the quantum resources.Through security analysis,we prove that our protocol can withstand well-known attacks and brute-force attacks.Analyses also reveal that our protocol is correct and practical.

关 键 词：quantum private comparison protocol one direction quantum walks EFFICIENCY brute-force attack 

分 类 号：O413[理学—理论物理]