In order to protect the privacy of query user and database,some QKD-based quantum private query(QPQ)protocols were proposed.Unfortunately some of them cannot resist internal attack from database perfectly;some others ...In order to protect the privacy of query user and database,some QKD-based quantum private query(QPQ)protocols were proposed.Unfortunately some of them cannot resist internal attack from database perfectly;some others can ensure better user privacy but require a reduction of database privacy.In this paper,a novel two-way QPQ protocol is proposed to ensure the privacy of both sides of communication.In our protocol,user makes initial quantum states and derives the key bit by comparing initial quantum state and outcome state returned from database by ctrl or shift mode instead of announcing two non-orthogonal qubits as others which may leak part secret information.In this way,not only the privacy of database be ensured but also user privacy is strengthened.Furthermore,our protocol can also realize the security of loss-tolerance,cheat-sensitive,and resisting JM attack etc.展开更多
基金Supported by National Natural Science Foundation of China under Grant Nos.U1636106,61572053,61472048,61602019,61502016Beijing Natural Science Foundation under Grant Nos.4152038,4162005+1 种基金Basic Research Fund of Beijing University of Technology(No.X4007999201501)The Scientific Research Common Program of Beijing Municipal Commission of Education under Grant No.KM201510005016
文摘In order to protect the privacy of query user and database,some QKD-based quantum private query(QPQ)protocols were proposed.Unfortunately some of them cannot resist internal attack from database perfectly;some others can ensure better user privacy but require a reduction of database privacy.In this paper,a novel two-way QPQ protocol is proposed to ensure the privacy of both sides of communication.In our protocol,user makes initial quantum states and derives the key bit by comparing initial quantum state and outcome state returned from database by ctrl or shift mode instead of announcing two non-orthogonal qubits as others which may leak part secret information.In this way,not only the privacy of database be ensured but also user privacy is strengthened.Furthermore,our protocol can also realize the security of loss-tolerance,cheat-sensitive,and resisting JM attack etc.
