Multi-user quantum private comparison with scattered preparation and one-way convergent transmission of quantum states  

作　　者：TianYu Ye ZhaoXu Ji 

机构地区：[1]College of Information & Electronic Engineering, Zhejiang Gongshang University

出　　处：《Science China(Physics,Mechanics & Astronomy)》2017年第9期7-16,共10页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.61402407,and 11375152)

摘　　要：Quantum private comparison(QPC) aims to accomplish the equality comparison of the secrets from different users without disclosing their genuine contents by using the principles of quantum mechanics. In this paper, we summarize eight modes of quantum state preparation and transmission existing in current QPC protocols first. Then, by using the mode of scattered preparation and one-way convergent transmission, we construct a new multi-user quantum private comparison(MQPC) protocol with two-particle maximally entangled states, which can accomplish arbitrary pair's comparison of equality amongK users within one execution. Analysis turns out that its output correctness and its security against both the outside attack and the participant attack are guaranteed. The proposed MQPC protocol can be implemented with current technologies. It can be concluded that the mode of scattered preparation and one-way convergent transmission of quantum states is beneficial to designing the MQPC protocol which can accomplish arbitrary pair's comparison of equality among K users within one execution.Quantum private comparison （QPC） aims to accomplish the equality comparison of the secrets from different users without disclosing their genuine contents by using the principles of quantum mechanics. In this paper, we summarize eight modes of quantum state preparation and transmission existing in current QPC protocols first. Then, by using the mode of scattered preparation and one-way convergent transmission, we construct a new multi-user quantum private comparison （MQPC） protocol with two-particle maximally entangled states, which can accomplish arbitrary pair＇s comparison of equality among K users within one execution. Analysis turns out that its output correctness and its security against both the outside attack and the participant attack are guaranteed. The proposed MQPC protocol can be implemented with current technologies. It can be concluded that the mode of scattered preparation and one-way convergent transmission of quantum states is beneficial to designing the MQPC protocol which can accomplish arbitrary pair＇s comparison of equality among K users within one execution.

关 键 词：multi-user quantum private comparison （MQPC） scattered preparation one-way convergent transmission 

分 类 号：O413[理学—理论物理] TN918[理学—物理]