Robust QKD-based private database queries based on alternative sequences of single-qubit measurements
作者: YuGuang YangZhiChao LiuXiuBo ChenYiHua ZhouWeiMin Shi
作者单位: 1Beijing University of Technology
2Beijing University of Posts and Telecommunications
刊名: Science China Physics, Mechanics & Astronomy, 2017, Vol.60 (12)
来源数据库: Springer Journal
DOI: 10.1007/s11433-017-9085-0
关键词: Quantum cryptographyQuantum private queryDecoherence-free statesCollective noise
英文摘要: Quantum channel noise may cause the user to obtain a wrong answer and thus misunderstand the database holder for existing QKD-based quantum private query (QPQ) protocols. In addition, an outside attacker may conceal his attack by exploiting the channel noise. We propose a new, robust QPQ protocol based on four-qubit decoherence-free (DF) states. In contrast to existing QPQ protocols against channel noise, only an alternative fixed sequence of single-qubit measurements is needed by the user (Alice) to measure the received DF states. This property makes it easy to implement the proposed protocol by exploiting current technologies. Moreover, to retain the advantage of flexible database queries, we reconstruct Alice’s measurement operators so that Alice needs only conditioned sequences of...
原始语种摘要: Quantum channel noise may cause the user to obtain a wrong answer and thus misunderstand the database holder for existing QKD-based quantum private query (QPQ) protocols. In addition, an outside attacker may conceal his attack by exploiting the channel noise. We propose a new, robust QPQ protocol based on four-qubit decoherence-free (DF) states. In contrast to existing QPQ protocols against channel noise, only an alternative fixed sequence of single-qubit measurements is needed by the user (Alice) to measure the received DF states. This property makes it easy to implement the proposed protocol by exploiting current technologies. Moreover, to retain the advantage of flexible database queries, we reconstruct Alice’s measurement operators so that Alice needs only conditioned sequences of...
全文获取路径: Springer  (合作)
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关键词翻译
关键词翻译
  • database 资料库
  • private 私有的
  • single 单独的
  • query 查询
  • attacker 攻击者
  • existing 现行
  • noise 噪声
  • alternative 可选择的
  • flexible 接电绳
  • propose 提议