A Quantum Protocol for Millionaire Problem with Continuous Variables  

作　　者：周艺华 侍伟敏 杨宇光 

机构地区：[1]College of Computer Science and Technology,Beijing University of Technology

出　　处：《Communications in Theoretical Physics》2014年第4期452-456,共5页理论物理通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos.61170270,61003290,61170221,61100205;the Specialized Research Fund for the Doctoral Program of Higher Education under Grant Nos.20091103120014,20090005110010;Beijing Natural Science Foundation under Grant No.4122008;the ISN open Foundation

摘　　要：In this paper, a protocol for quantum millionaire problem with continuous variables is proposed. In the protocol, two participants can compare the values of their fortune with the assistance of a semi-trusted third party(STTP). Only EPR states are exploited in our protocol while most other protocols exploited d-dimensional Bell states.Two participants are just required to perform single particle operations, which makes our protocol more efficiently. Our protocol can ensure fairness, correctness, security and high efficiency as well. In our protocol, only the two participants can deduce the results of comparisons, others include STTP will learn no information. Our protocol can resist various kinds of attacks from both the outside eavesdroppers and the inside participants, even the STTP.

关 键 词：secure multiparty quantum computation millionaire problem continuous variables quantumcryptography 

分 类 号：O413[理学—理论物理]