Efficient quantum private comparison protocol utilizing single photons and rotational encryption  

作　　者：Tian-Yi Kou Bi-Chen Che Zhao Dou Xiu-Bo Chen Yu-Ping Lai Jian Li 寇天翊;车碧琛;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6期221-227,共7页中国物理B（英文版）

基　　金：supported by the National Key Research and Development 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(Grant No.2020RC38)。

摘　　要：As a branch of quantum secure multiparty computation,quantum private comparison is applied frequently in many fields,such as secret elections,private voting,and identification.A quantum private comparison protocol with higher efficiency and easier implementation is proposed in this paper.The private secrets are encoded as single polarized photons and then encrypted with a homomorphic rotational encryption method.Relying on this method and the circular transmission mode,we implement the multiplexing of photons,raising the efficiency of our protocol to 100%.Our protocol is easy to realize since only single photons,unitary operation,and single-particle measurement are introduced.Meanwhile,the analysis shows that our protocol is also correct and secure.

关 键 词：quantum private comparison rotational encryption polarized single photons EFFICIENCY 

分 类 号：O431.2[机械工程—光学工程] TN918.4[理学—光学]