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    • 6. 发明授权
    • Quantum cryptography
    • 量子密码学
    • US07983422B2
    • 2011-07-19
    • US10627158
    • 2003-07-25
    • Adrian Patrick KentWilliam John MunroTimothy Paul SpillerRaymond G Beausoleil
    • Adrian Patrick KentWilliam John MunroTimothy Paul SpillerRaymond G Beausoleil
    • H04L9/08
    • H04L9/0858
    • A method of establishing a shared secret random cryptographic key between a sender and a recipient using a quantum communications channel is described. The method comprises: generating a plurality of random quantum states of a quantum entity, each random state being defined by a randomly selected one of a first plurality of bases in Hilbert space, transmitting the plurality of random quantum states of the quantum entity via the quantum channel to a recipient, measuring the quantum state of each of the received quantum states of the quantum entity with respect to a randomly selected one of a second plurality of bases in Hilbert space, transmitting to the recipient composition information describing a subset of the plurality of random quantum states, analysing the received composition information and the measured quantum states corresponding to the subset to derive a first statistical distribution describing the subset of transmitted quantum states and a second statistical distribution describing the corresponding measured quantum states, establishing the level of confidence in the validity of the plurality of transmitted random quantum states by verifying that the first and second statistical distributions are sufficiently similar, deriving a first binary sting and a second binary string, correlated to the first binary string, respectively from the transmitted and received plurality of quantum states not in the subset, and carrying out a reconciliation of the second binary string to the first binary string by using error correction techniques to establish the shared secret random cryptographic key from the first and second binary strings.
    • 描述了使用量子通信信道在发送者和接收者之间建立共享密钥随机密码密钥的方法。 该方法包括:产生量子实体的多个随机量子态,每个随机状态由希尔伯特空间中的第一多个碱基中的随机选择的一个定义,通过量子发射量子实体的多个随机量子态 通道到接收者,相对于希尔伯特空间中的第二多个基站中的随机选择的一个测量量子实体的每个接收量子态的量子态,向接收者合成发送描述多个 随机量子状态,分析所接收的组成信息和对应于该子集的测量量子状态以导出描述所发射量子态子集的第一统计分布,以及描述对应测量量子态的第二统计分布, 多个发送的随机量子的有效性 通过验证第一和第二统计分布足够相似,分别从不在子集中的发送和接收的多个量子状态导出与第一二进制串相关的第一二进制字符串和第二二进制字符串,并执行 通过使用纠错技术来从第一和第二二进制串建立共享秘密随机加密密钥来将第二二进制字符串与第一二进制字符串的对帐。