摘要
Quantum private comparison is an important topic in quantum cryptography.Recently,the idea of semi-quantumness has been often used in designing private comparison protocol,which allows some of the participants to remain classical.In this paper,we propose a semi quantum private comparison scheme based on Greenberge-Horne-Zeilinger(GHZ)class states,which allows two classical participants to compare the equality of their private secret with the help of a quantum third party(server).In the proposed protocol,server is semi-honest who will follow the protocol honestly,but he may try to learn additional information from the protocol execution.The classical participants’activities are restricted to either measuring a quantum state or reflecting it in the classical basis{0,1}.In addition,security and efficiency of the proposed schemes have been discussed.
基金
supported by the National Natural Science Foundation of China(Grant No.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).
