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。

公开(公告)号：US20070230688A1

公开(公告)日：2007-10-04

申请号：US11505814

申请日：2006-08-18

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： H04L9/30

CPC分类号： H04L9/0858 ,  H04B10/70 ,  H04L9/0891

摘要： A user request can be reflected in the degree of security of an updated key in quantum key distribution. A sender and a receiver are connected through optical fiber. A quantum transmitter in the sender and a quantum receiver in the receiver carry out basis reconciliation and error correction through a quantum channel, based on a source of a key sent from the quantum transmitter and on a raw key received by the quantum receiver. Under the control of security control sections in the sender and receiver, the amount of information with the possibility of being intercepted that is determined in accordance with a degree of security requested by a user, is removed from the key information after error correction, whereby a final cryptographic key is generated. Secret communication is performed between encryption/decryption sections in the sender and receiver by using the cryptographic key thus updated.

摘要翻译： 用户请求可以反映在量子密钥分发中更新密钥的安全程度。 发送器和接收器通过光纤连接。 发送器中的量子发射器和接收器中的量子接收器通过量子通道基于从量子发射器发送的密钥的源和由量子接收器接收的原始密钥来执行基础协调和纠错。 在发送方和接收方的安全控制部分的控制下，根据用户要求的安全程度确定可能被拦截的信息量在纠错后从密钥信息中移除，由此 生成最终加密密钥。 通过使用由此更新的加密密钥在发送方和接收方的加密/解密部分之间执行秘密通信。

公开(公告)号：US20070009098A1

公开(公告)日：2007-01-11

申请号：US11482131

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： H04L9/30

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，阈值被预设，包括用于帧同步处理的阈值Q SUB位，用于相位校正处理的阈值Q相位＆lt; / SUB＆gt;和阈值 Q 用于窃听检测。 当量子密钥从发送器分配到接收器时，当QBER的测量值劣化到大于Q 时，执行帧同步处理。 当QBER的测量值劣化到大于Q相位时，执行相位校正处理和帧同步处理。 即使在这些恢复处理步骤重复N次之后，当QBER不比Q 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：US20050273572A1

公开(公告)日：2005-12-08

申请号：US10972429

申请日：2004-10-26

申请人： Seigo Takahashi ,  Atsushi Ike

发明人： Seigo Takahashi ,  Atsushi Ike

IPC分类号： G06F12/10 ,  G06F9/46 ,  G06F12/08

CPC分类号： G06F12/1045 ,  G06F12/109

摘要： An address translator capable of reducing system loads in address translation and an overhead in switching between operating systems. A plurality of address translation buffers classifies and stores virtual addresses and real addresses based on a plurality of operating systems which is run by a processor. For example, the address translation buffers store the virtual addresses and the real addresses in correspondence with the operating systems. According to a running operating system, an address translation controller accesses a corresponding address translation buffer to translate virtual addresses to real addresses.

摘要翻译： 一种地址转换器，能够减少地址转换中的系统负载以及在操作系统之间切换的开销。 多个地址转换缓冲器基于由处理器运行的多个操作系统对虚拟地址和实际地址进行分类和存储。 例如，地址转换缓冲器存储与操作系统相对应的虚拟地址和实际地址。 根据正在运行的操作系统，地址转换控制器访问相应的地址转换缓冲器以将虚拟地址转换为实际地址。

公开(公告)号：US06957018B2

公开(公告)日：2005-10-18

申请号：US10151789

申请日：2002-05-21

申请人： Soichiro Araki ,  Yoshihiko Suemura ,  Akio Tajima ,  Seigo Takahashi ,  Yoshiharu Maeno ,  Naoya Henmi

发明人： Soichiro Araki ,  Yoshihiko Suemura ,  Akio Tajima ,  Seigo Takahashi ,  Yoshiharu Maeno ,  Naoya Henmi

IPC分类号： H04B10/27 ,  H04B10/00 ,  H04L12/931 ,  H04Q3/00 ,  H04Q3/52 ,  H04Q11/00 ,  H04J14/00

CPC分类号： H04Q11/0001 ,  H04L49/25 ,  H04L49/30 ,  H04L49/50 ,  H04Q2011/0024 ,  H04Q2011/0039 ,  H04Q2011/0045 ,  H04Q2011/005

摘要： An optical packet exchange apparatus and an optical switch in which search for a connection pattern between an input unit devoid of a packet to be transmitted and an output unit devoid of a packet to be received is reduced to enable fast switch control even in cases wherein the number of channels of the exchange apparatus is increased or network speed is higher. A plurality of input units, a plurality of output units and an optical switch are provided. Each input unit includes an input buffer unit, a parallel/serial conversion unit, an electrical/optical conversion unit, and a dummy packet insertion unit for sending a dummy packet if there is no packet to be transmitted. Each output unit includes an exchange counterpart contention resolution unit for controlling the exchange counterpart, an optical/electrical conversion unit, a serial/parallel conversion unit, and a packet eliminating unit. The exchange counterpart contention resolution unit controls the packet eliminating unit to eliminate a dummy packet.

摘要翻译： 一种光分组交换装置和光开关，其中，在没有要发送的分组的输入单元和没有要接收的分组的输出单元之间的连接模式的搜索被减少以便能够快速切换控制，即使在 交换装置的信道数量增加或网络速度较高。 提供多个输入单元，多个输出单元和光学开关。 每个输入单元包括输入缓冲器单元，并行/串行转换单元，电/光转换单元和用于在不存在要发送的分组的情况下发送虚拟分组的虚拟分组插入单元。 每个输出单元包括用于控制交换对方的交换对方争用解决单元，光/电转换单元，串行/并行转换单元和分组消除单元。 交换对手争用解决单元控制分组消除单元以消除虚拟分组。

公开(公告)号：US06570687B2

公开(公告)日：2003-05-27

申请号：US10123444

申请日：2002-04-16

申请人： Soichiro Araki ,  Yoshihiko Suemura ,  Akio Tajima ,  Seigo Takahashi ,  Yoshiharu Maeno ,  Naoya Henmi

发明人： Soichiro Araki ,  Yoshihiko Suemura ,  Akio Tajima ,  Seigo Takahashi ,  Yoshiharu Maeno ,  Naoya Henmi

IPC分类号： H04J1408

CPC分类号： H04Q11/0001 ,  H04L49/25 ,  H04L49/30 ,  H04L49/50 ,  H04Q2011/0024 ,  H04Q2011/0039 ,  H04Q2011/0045 ,  H04Q2011/005

摘要： An optical packet exchange apparatus and an optical switch in which search for a connection pattern between an input unit devoid of a packet to be transmitted and an output unit devoid of a packet to be received is reduced to enable fast switch control even in cases wherein the number of channels of the exchange apparatus is increased or network speed is higher. A plurality of input units, a plurality of output units and an optical switch are provided. Each input unit includes an input buffer unit, a parallel/serial conversion unit, an electrical/optical conversion unit, and a dummy packet insertion unit for sending a dummy packet if there is no packet to be transmitted. Each output unit includes an exchange counterpart contention resolution unit for controlling the exchange counterpart, an optical/electrical conversion unit, a serial/parallel conversion unit, and a packet eliminating unit. The exchange counterpart contention resolution unit controls the packet eliminating unit to eliminate a dummy packet.

公开(公告)号：US06424440B1

公开(公告)日：2002-07-23

申请号：US09181620

申请日：1998-10-28

申请人： Hirofumi Shimomura ,  Seigo Takahashi ,  Naoya Henmi

发明人： Hirofumi Shimomura ,  Seigo Takahashi ,  Naoya Henmi

IPC分类号： H04J1402

CPC分类号： H04Q11/0001 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/094061 ,  H01S3/10007 ,  H01S3/1608 ,  H04J14/0204 ,  H04J14/0206 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0221

摘要： The first present invention provides an optical switch including the following elements. At least a plurality of optical transmission lines are provided for transmissions of optical signals. Each of the at least plurality of optical transmission lines have a least an impurity doped fiber. At least an excitation light source is provided for emitting an excitation light. At least an excitation light switch is provided which is connected to the excitation light source and also connected to the at least plurality of optical transmission lines for individual switching operations to supply the excitation light to the at least plurality of optical transmission lines to feed the excitation light to the impurity doped fiber on the at least plurality of optical transmission lines, thereby causing an excitation of the impurity doped fiber on selected one of the at least plurality of optical transmission lines so as to permit a transmission of the optical signal through the excited impurity doped fiber, whilst unselected one of the impurity doped fibers is unexcited whereby the optical signals are absorbed into the unselected one of the impurity doped fibers thereby to discontinue an transmission of the optical signal by the unselected one of the impurity doped fibers.

摘要翻译： 第一本发明提供一种包括以下元件的光开关。 至少多个光传输线被提供用于光信号的传输。 所述至少多个光传输线中的每一个具有至少一个杂质掺杂光纤。 至少提供了用于发射激发光的激发光源。 至少提供激励光开关，其连接到激发光源并且还连接到用于单独切换操作的至少多个光传输线，以将激发光提供给至少多个光传输线以馈送激励 在所述至少多个光传输线上对所述杂质掺杂光纤进行光照射，从而使所述杂质掺杂光纤在所述至少多个光传输线路中的所选择的一个光纤传输线路上激发，以允许所述光信号通过所述激发 杂质掺杂光纤，而未选择的杂质掺杂光纤中的一个是未激发的，由此光信号被吸收到未选择的杂质掺杂光纤中，从而中断由未选择的杂质掺杂光纤传输光信号。

公开(公告)号：US06373911B1

公开(公告)日：2002-04-16

申请号：US09239090

申请日：1999-01-27

申请人： Akio Tajima ,  Yoshihiko Suemura ,  Soichiro Araki ,  Seigo Takahashi ,  Yoshiharu Maeno ,  Naoya Henmi

发明人： Akio Tajima ,  Yoshihiko Suemura ,  Soichiro Araki ,  Seigo Takahashi ,  Yoshiharu Maeno ,  Naoya Henmi

IPC分类号： H03D324

CPC分类号： H04L7/02 ,  H03L7/0812 ,  H04L7/0083 ,  H04L7/0337 ,  H04L7/0338 ,  H04L7/10

摘要： A bit synchronization circuit operates at high speed range as high as Gb/s or higher and can establish synchronization within 10 bits with rejecting jitter to permit accurate bit synchronization. The bit synchronization circuit thus generates a plurality of clocks having mutually different phases in synchronism with an input reference clock. A phase relationship between a plurality of clocks and an input data to be decided is discriminated by a phase comparator circuit. The clock having optimal phase relationship, namely clock having level transition timing having at a substantially center portion of mutually adjacent level transition timing of the input data, is determined by a phase determination circuit. An decision circuit and selector are provided for deciding input data at the level transition timing of the determined clock.

摘要翻译： 位同步电路在高达Gb / s或更高的高速范围内工作，并且可以在10位内建立同步，同时抑制抖动以允许精确的位同步。 因此，比特同步电路产生与输入参考时钟同步的具有相互不同相位的多个时钟。 通过相位比较器电路鉴别多个时钟与待决定的输入数据之间的相位关系。 具有最佳相位关系的时钟，即具有在输入数据的相互相邻电平转换定时的大致中心部分处的电平转换定时的时钟由相位确定电路确定。 提供决定电路和选择器，用于在所确定的时钟的电平转换定时处决定输入数据。