公开(公告)号：US20090316910A1

公开(公告)日：2009-12-24

申请号：US12136419

申请日：2008-06-10

申请人： Wakako Maeda ,  Akio Tajima ,  Akihiro Tanaka ,  Seigo Takahashi

发明人： Wakako Maeda ,  Akio Tajima ,  Akihiro Tanaka ,  Seigo Takahashi

IPC分类号： H04L9/08 ,  H04L9/14

CPC分类号： H04L9/0855 ,  H04L9/083 ,  H04L9/0891

摘要： A cryptographic key management method and device are provided by which cryptographic keys of multiple nodes can be managed easily and stably. A system includes at least one first node and a plurality of second nodes connected to the first node, and the first node individually generates and consumes a cryptographic key with each of the second nodes connected to the first node itself. A cryptographic key management device in such a system has a monitor that monitors the stored key amounts of cryptographic keys of the individual second nodes, stored at the first node, and a key management control section that performs key generation control on the first node, based on the stored key amounts.

摘要翻译： 提供一种加密密钥管理方法和装置，可以容易且稳定地管理多个节点的加密密钥。 系统包括连接到第一节点的至少一个第一节点和多个第二节点，并且第一节点单独地生成并消耗加密密钥，其中每个第二节点连接到第一节点本身。 这种系统中的加密密钥管理装置具有监视器，该监视器监视存储在第一节点处的各个第二节点的密码密钥的存储密钥量，以及基于第一节点执行密钥生成控制的密钥管理控制部件 关于存储的关键金额。

公开(公告)号：US20070110454A1

公开(公告)日：2007-05-17

申请号：US11471876

申请日：2006-06-21

申请人： Wakako Maeda ,  Akio Tajima ,  Akihiro Tanaka ,  Seigo Takahashi

发明人： Wakako Maeda ,  Akio Tajima ,  Akihiro Tanaka ,  Seigo Takahashi

IPC分类号： H04B10/04

CPC分类号： H04L9/0852 ,  H04B10/548

摘要： A communication system and a timing control method are proposed that optimize timing in a sender and thereby enable information to be stably transmitted at the right timing. Under instructions from a timing controller in a receiver, the timing of driving a phase modulator in a sender is shifted by one step after another, and the then amount of clock shift and result of interference are monitored at the receiver and stored in a memory. The optimum timing is determined based on the stored data. Thus, a clock for driving the phase modulator in the sender can be set at the right timing. This is equivalent to compensating for group velocity dispersion due to wavelength dispersion that occurs when an optical signal channel and a clock signal channel are transmitted by wavelength division multiplexing transmission.

摘要翻译： 提出一种通信系统和定时控制方法，其优化发送方的定时，从而使信息能够在正确的时机稳定地发送。 在来自接收机中的定时控制器的指令下，将发送器中的相位调制器驱动的定时一个接一个地移位，然后在接收器处监视时钟偏移量和干扰结果，并将其存储在存储器中。 基于所存储的数据确定最佳定时。 因此，可以在正确的时机设置用于驱动发送器中的相位调制器的时钟。 这相当于补偿当通过波分复用传输发送光信号通道和时钟信号通道时发生的由于波长色散引起的群速度色散。

公开(公告)号：US08391491B2

公开(公告)日：2013-03-05

申请号：US11482016

申请日：2006-07-07

申请人： Akihiro Tanaka ,  Akio Tajima ,  Seigo Takahashi ,  Wakako Maeda

发明人： Akihiro Tanaka ,  Akio Tajima ,  Seigo Takahashi ,  Wakako Maeda

IPC分类号： H04L29/06

CPC分类号： H04L9/0852

摘要： A sender transmits to a receiver an optical signal that is phase-modulated in accordance with source data and a basis stored in a memory. The receiver phase-modulates the received optical signal in accordance with a basis, obtains detection data through interference, and stores the detection data in a memory. An inter-device address difference (GD) and an intra-device address difference (DI) are provisionally set. The detection data are checked against the source data while sequentially changing the values of GD and DI within a predetermined adjustment range. Based on the result of this checking, GD and DI are determined.

摘要翻译： 发送方向接收机发送根据源数据和存储在存储器中的基准进行相位调制的光信号。 接收机根据基础对接收的光信号进行相位调制，通过干扰获得检测数据，并将检测数据存储在存储器中。 临时设置设备间地址差（GD）和设备内地址差（DI）。 根据源数据检查检测数据，同时在预定调整范围内顺序地改变GD和DI的值。 根据检查结果确定GD和DI。

公开(公告)号：US08041039B2

公开(公告)日：2011-10-18

申请号：US11788239

申请日：2007-04-19

申请人： Akio Tajima ,  Akihiro Tanaka ,  Wakako Maeda ,  Seigo Takahashi

发明人： Akio Tajima ,  Akihiro Tanaka ,  Wakako Maeda ,  Seigo Takahashi

IPC分类号： H04L9/08

CPC分类号： H04L9/0852 ,  H04L9/0855

摘要： A secret communications system realizes point-to-multipoint or multipoint-to-multipoint connections of both quantum channels and classical channels. Multiple remote nodes are individually connected to a center node through optical fiber, and random-number strings K1 to KN are individually generated and shared between the respective remote nodes and the center node. Encrypted communication is performed between each remote node and the center node by using the corresponding one of the shared random-number strings K1 to KN as a cryptographic key. The center node is provided with a switch section for quantum channels and a switch section for classical channels. Switching control on each of these switch sections is performed independently of the other by a controller.

摘要翻译： 秘密通信系统实现了量子通道和经典通道的点对多点或多点到多点连接。 多个远程节点通过光纤单独连接到中心节点，并且在各个远程节点和中心节点之间分别生成并共享随机数字串K1至KN。 通过使用共享随机数字符串K1至KN中的相应一个作为加密密钥，在每个远程节点和中心节点之间执行加密通信。 中心节点设有用于量子通道的开关部分和经典通道的开关部分。 这些开关部分中的每一个的开关控制由控制器独立地执行。

公开(公告)号：US20110167299A1

公开(公告)日：2011-07-07

申请号：US13018486

申请日：2011-02-01

申请人： Akihiro Tanaka ,  Akio Tajima ,  Seigo Takahashi ,  Wakako Maeda

发明人： Akihiro Tanaka ,  Akio Tajima ,  Seigo Takahashi ,  Wakako Maeda

IPC分类号： G06F11/14

CPC分类号： H04L1/242 ,  H04L9/0858 ,  H04L2209/34

摘要： For an error rate QBER, threshold values are preset, including a threshold value Qbit for frame synchronization processing, a threshold value Qphase for phase correction processing, and a threshold value QEve for eavesdropping detection. Upon the distribution of a quantum key from a sender to a receiver, when the measurement value of QBER is deteriorated more than Qbit, frame synchronization processing is performed. When the measurement value of QBER is deteriorated more than Qphase, phase correction processing and frame synchronization processing are performed. When QBER does not become better than QEve even after these recovery-processing steps are repeated N times, it is determined that there is a possibility of eavesdropping, and the processing is stopped.

摘要翻译： 对于错误率QBER，预设阈值，包括帧同步处理的阈值Qbit，相位校正处理的阈值Qphase和用于窃听检测的阈值QEve。 当量子密钥从发送方分配到接收方时，当QBER的测量值恶化到比Qbit多的时候，执行帧同步处理。 当QBER的测量值劣于Qphase时，执行相位校正处理和帧同步处理。 即使在重复了N次这些恢复处理步骤之后，当QBER不比QEve变得更好时，确定存在窃听的可能性，并且停止处理。

公开(公告)号：US20090236501A1

公开(公告)日：2009-09-24

申请号：US12409323

申请日：2009-03-23

申请人： Seigo Takahashi ,  Akio Tajima ,  Akihiro Tanaka ,  Wakako Maeda

发明人： Seigo Takahashi ,  Akio Tajima ,  Akihiro Tanaka ,  Wakako Maeda

IPC分类号： H01J40/14

CPC分类号： G01J1/44

摘要： A photon detection circuit in which photon detection is performed by applying gate pulses to a light-receiving element at predetermined periods, includes: a gate-period waveform averaging section that generates averaged waveform data by averaging sampled waveform data output from the light-receiving element in the individual predetermined periods; a phase shifting section that shifts at least one of the phases of the averaged waveform data and sampled waveform data so that a phase difference between the averaged waveform data and sampled waveform date disappears; and a discrimination section that discriminates a photon detection based on the phase-adjusted sampled waveform data relative to the phase-adjusted averaged waveform data.

摘要翻译： 一种光子检测电路，其中通过以预定周期向光接收元件施加栅极脉冲来执行光子检测，包括：栅极周期波形平均化部分，其通过对从光接收元件输出的采样波形数据进行平均而产生平均波形数据 在个别预定期间; 移相部分，使平均波形数据和采样波形数据的相位中的至少一个相位移动，使得平均波形数据和采样波形日期之间的相位差消失; 以及判别部，其基于相位调整后的采样波形数据相对于相位调整后的平均波形数据来辨别光子检测。

公开(公告)号：US07560683B2

公开(公告)日：2009-07-14

申请号：US11392575

申请日：2006-03-30

申请人： Seigo Takahashi ,  Akio Tajima ,  Takeshi Takeuchi ,  Akihiro Tanaka ,  Wakako Maeda

发明人： Seigo Takahashi ,  Akio Tajima ,  Takeshi Takeuchi ,  Akihiro Tanaka ,  Wakako Maeda

IPC分类号： G01J1/44 ,  H01J40/14 ,  H03F3/08

CPC分类号： H03F1/26 ,  H03F3/087 ,  H03F2200/198

摘要： In a photo detecting circuit using an avalanche photodiode (APD), a pulse noise mask signal indicating the timing of occurrence of a pulse noise is generated by XORing a reverse-bias-pulse application timing signal and its delayed signal. Pulse noises are eliminated by ANDing an output signal of the APD and the pulse noise mask signal. Alternatively, a pulse noise is estimated by taking the average for the output current signal a given number of times. Pulse noises are eliminated by subtracting the estimated pulse noise from the APD output signal.

摘要翻译： 在使用雪崩光电二极管（APD）的光检测电路中，通过对反向偏置脉冲施加定时信号及其延迟信号进行异或来产生表示脉冲噪声发生的定时的脉冲噪声屏蔽信号。 通过对APD的输出信号和脉冲噪声屏蔽信号进行AND运算来消除脉冲噪声。 或者，通过将输出电流信号的平均值取给定次数来估计脉冲噪声。 通过从APD输出信号中减去估计的脉冲噪声来消除脉冲噪声。

公开(公告)号：US20080147820A1

公开(公告)日：2008-06-19

申请号：US12000471

申请日：2007-12-13

申请人： Wakako Maeda ,  Akio Tajima ,  Seigo Takahashi ,  Akihiro Tanaka

发明人： Wakako Maeda ,  Akio Tajima ,  Seigo Takahashi ,  Akihiro Tanaka

IPC分类号： G06F15/16

CPC分类号： H04L63/065 ,  H04L9/0858 ,  H04L63/0428 ,  H04L63/06

摘要： A method and system for allowing communication devices to synchronously manage shared information are provided. A sender sends single-photon pulses modulated with original random numbers to a receiver and also sends frame pulses by using ordinary optical pulses. Bit comparison and basis reconciliation are performed by the frame which is defined by the frame pulses, whereby sifted keys, which are aggregated as a file, are generated by the sender and the receiver individually. The sifted keys are subjected to error correction, privacy amplification, and file sharing processing by the file, whereby common cryptographic keys are synchronously stored in the sender and the receiver individually. The generated cryptographic keys are managed as encryption keys and decryption keys separately. A newly generated key is preferentially placed in the encryption keys or decryption keys that have a smaller stored amount.

摘要翻译： 提供了允许通信设备同步管理共享信息的方法和系统。 发送方发送用原始随机数调制的单光子脉冲到接收机，并且通过使用普通光脉冲发送帧脉冲。 比特比较和基础协调由帧脉冲定义的帧执行，由此发送者和接收者分别生成作为文件聚合的筛选密钥。 筛选的密钥经过文件的纠错，隐私放大和文件共享处理，从而公共密码密钥被单独地同步地存储在发送器和接收器中。 生成的加密密钥分别作为加密密钥和解密密钥进行管理。 新产生的密钥优先放置在具有较小存储量的加密密钥或解密密钥中。

公开(公告)号：US20080052577A1

公开(公告)日：2008-02-28

申请号：US11621872

申请日：2007-01-10

申请人： Akihiro Tanaka ,  Akio Tajima ,  Seigo Takahashi ,  Wakako Maeda

发明人： Akihiro Tanaka ,  Akio Tajima ,  Seigo Takahashi ,  Wakako Maeda

IPC分类号： G01R31/28

CPC分类号： H04L9/0852 ,  G06F7/58 ,  H04L9/0838

摘要： A random number quality control circuit capable of fast control of the level of random number quality is present. When a “0” output section and a “1” output section generate random numbers by individually receiving a random number signal, a random number quality monitor monitors an unbalance between the numbers of “0”s and “1”s. If a deviation from a desired ratio is found, a drive controller controls the reception characteristics of the “0” output section and “1” output section individually so that the deviation will be compensated for. The amount of information intercepted between a sender and a receiver can be reduced by maintaining the mark ratio of shared random numbers at 50%.

摘要翻译： 存在能够快速控制随机数质量水平的随机数质量控制电路。 当“0”输出部分和“1”输出部分通过分别接收随机数信号产生随机数时，随机数质量监视器监视“0”和“1”之间的不平衡。 如果发现与期望比率的偏差，则驱动控制器分别控制“0”输出部分和“1”输出部分的接收特性，以便补偿偏差。 通过将共享随机数的标记比维持在50％，可以减少发送方和接收方之间拦截的信息量。

公开(公告)号：US20080013738A1

公开(公告)日：2008-01-17

申请号：US11788239

申请日：2007-04-19

申请人： Akio Tajima ,  Akihiro Tanaka ,  Wakako Maeda ,  Seigo Takahashi

发明人： Akio Tajima ,  Akihiro Tanaka ,  Wakako Maeda ,  Seigo Takahashi

IPC分类号： H04L9/08 ,  H04L9/28

CPC分类号： H04L9/0852 ,  H04L9/0855

摘要： A secret communications system realizes point-to-multipoint or multipoint-to-multipoint connections of both quantum channels and classical channels. Multiple remote nodes are individually connected to a center node through optical fiber, and random-number strings K1 to KN are individually generated and shared between the respective remote nodes and the center node. Encrypted communication is performed between each remote node and the center node by using the corresponding one of the shared random-number strings K1 to KN as a cryptographic key. The center node is provided with a switch section for quantum channels and a switch section for classical channels. Switching control on each of these switch sections is performed independently of the other by a controller.

摘要翻译： 秘密通信系统实现了量子通道和经典通道的点对多点或多点到多点连接。 多个远程节点通过光纤单独连接到中心节点，并且在各个远程节点和中心节点之间分别生成并共享随机数字串K 1至KN。 通过使用共享随机数字符串K 1至K N中的相应一个作为密码密钥，在每个远程节点和中心节点之间执行加密通信。 中心节点设有用于量子通道的开关部分和经典通道的开关部分。 这些开关部分中的每一个的开关控制由控制器独立地执行。