Robust and efficient quantum private comparison of equality with collective detection over collective-noise channels  

作　　者：HUANG Wei WEN QiaoYan LIU Bin GAO Fei SUN Ying 

机构地区：[1]State Key Laboratory of Networking and Switching Technology,Beijing University of Posts and Telecommunications [2]State Key Laboratory of Information Security,Institute of Software,Chinese Academy of Sciences [3]Beijing Electronic Science and Technology Institute

出　　处：《Science China(Physics,Mechanics & Astronomy)》2013年第9期1670-1678,共9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.61272057,61170270,61100203,61003286,61121061 and 61103210);the Program for New Century Excellent Talents in Universities (Grant No.NCET-10-0260);the Specialized Research Fund for the Doctoral Program of Higher Education (Grant No.20090005110010);the Natural Science Foundation of Beijing (Grant Nos.4112040 and 4122054);the Fundamental Research Funds for the Central Universities (Grant No.2011YB01);the BUPT Excellent Ph.D.Students Foundation (Grant No.CX201217)

摘　　要：We present a protocol for quantum private comparison of equality(QPCE) with the help of a semi-honest third party(TP).Instead of employing the entanglement,we use single photons to achieve the comparison in this protocol.By utilizing collective eavesdropping detection strategy,our protocol has the advantage of higher qubit efficiency and lower cost of implementation.In addition to this protocol,we further introduce three robust versions which can be immune to collective dephasing noise,collective-rotation noise and all types of unitary collective noise,respectively.Finally,we show that our protocols can be secure against the attacks from both the outside eavesdroppers and the inside participants by using the theorems on quantum operation discrimination.We present a protocol for quantum private comparison of equality（QPCE） with the help of a semi-honest third party（TP）.Instead of employing the entanglement,we use single photons to achieve the comparison in this protocol.By utilizing collective eavesdropping detection strategy,our protocol has the advantage of higher qubit efficiency and lower cost of implementation.In addition to this protocol,we further introduce three robust versions which can be immune to collective dephasing noise,collective-rotation noise and all types of unitary collective noise,respectively.Finally,we show that our protocols can be secure against the attacks from both the outside eavesdroppers and the inside participants by using the theorems on quantum operation discrimination.

关 键 词：quantum private comparison of equality collective detection collective noise 

分 类 号：O431.2[机械工程—光学工程] TN918[理学—光学]