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21. 发明授权

US5742620A GMD decoding apparatus and a method therefor 失效
标题翻译： GMD解码装置及其方法
公开(公告)号：US5742620A
公开(公告)日：1998-04-21
申请号：US684080
申请日：1996-07-19
申请人： Keiichi Iwamura
发明人： Keiichi Iwamura
IPC分类号： G06F11/10 , H03M13/15 , H03M13/23 , H03M13/00
CPC分类号： H03M13/151
摘要： A decoding apparatus generates code words by means of syndrome polynomial, erasure location polynomial, and polynomials indicating error location and size thereof in order to materialize a high speed decoding with a smaller size of memory and a smaller amount of calculations. This decoding apparatus comprises an error location polynomial P.sub.k (x) using the product of the syndrome polynomial and the erasure location polynomial as an initial value; a memory unit to store the polynomial Q.sub.k (x) to obtain an error number and auxiliary polynomials U.sub.k (x) and W.sub.k (x); a calculation unit to execute a given plurality of calculations with a plurality of polynomials stored in the memory unit as input in order to output a plurality of polynomials, and a control unit to update the polynomials stored in the memory unit by the output of the calculating unit, and to decide on the input and output relations of the calculation unit in accordance with the d-2th coefficients d.sub.k and b.sub.k of the polynomials Q.sub.k (x) and W.sub.k (x).
摘要翻译：解码装置通过校正子多项式，擦除位置多项式和表示错误位置和大小的多项式来生成代码字，以便以较小的存储器大小和较少的计算量实现高速解码。该解码装置使用校正子多项式和擦除位置多项式的乘积作为初始值，包括误差位置多项式P k（x）存储单元，用于存储多项式Qk（x）以获得错误数和辅助多项式Uk（x）和Wk（x）; 计算单元，用于以存储在存储单元中的多个多项式来执行给定的多个计算，以输出多个多项式;以及控制单元，通过计算的输出更新存储在存储器单元中的多项式并且根据多项式Qk（x）和Wk（x）的第d-2个系数dk和bk来决定计算单元的输入和输出关系。

22. 发明授权

US5708714A Method for sharing secret information and performing certification in a communication system that has a plurality of information processing apparatuses 失效
标题翻译：用于在具有多个信息处理设备的通信系统中共享秘密信息和执行认证的方法
公开(公告)号：US5708714A
公开(公告)日：1998-01-13
申请号：US507524
申请日：1995-07-26
申请人： Jose Manuel Cerecedo Lopez , Keiichi Iwamura
发明人： Jose Manuel Cerecedo Lopez , Keiichi Iwamura
IPC分类号： H04L9/08 , H04L9/32 , H04L9/00
CPC分类号： H04L9/085 , H04L9/3255 , H04L2209/601
摘要： The object of the present invention is to perform verifiable secret sharing by a practical amount of calculation and a practical amount of communication. In addition, by using this process, a shared digital signature is generated, or a shared authentication server is provided. In a communication system where a plurality of information processing apparatuses are connected across secret communication channels and a broadcast communication channel, an information processing apparatus d generates a secret matrix from secret information s, l1, . . . , lk, extracts the first information segments for individual apparatuses i, and secretly transmits it to each apparatus i. The information processing apparatus d performs hash function on the secret matrix and broadcasts the output value. Each information processing apparatus i generates and broadcasts a random number, while the information processing apparatus d generates and broadcasts the second information segment from a partial array in consonance with the random number value. Each information processing apparatus i generates the third information segment in consonance with the first information segment and the random number, and verifies that the secret information has been correctly shared by comparing the third information segment with the second. By employing this secret information sharing method, apparatuses that belong to a group of signers cooperatively generate a signature, and a plurality of apparatuses that constitute authentication servers cooperatively provide authentication.
摘要翻译：本发明的目的是通过实际的计算量和实际的通信量来执行可验证的秘密共享。此外，通过使用该处理，生成共享数字签名，或者提供共享认证服务器。在多个信息处理装置跨越秘密通信信道和广播通信信道连接的通信系统中，信息处理装置d从秘密信息s1，l1生成秘密矩阵。。。 lk提取各个设备i的第一信息段，并秘密地将其发送到每个设备i。信息处理装置d对秘密矩阵执行散列函数并广播输出值。每个信息处理设备i产生并广播随机数，而信息处理设备d根据随机数值从部分阵列产生并广播第二信息段。每个信息处理装置i根据第一信息段和随机数生成第三信息段，并通过将第三信息段与第二信息段进行比较来验证秘密信息是否被正确共享。通过采用这种秘密信息共享方法，属于一组签名者的装置协同地生成签名，构成认证服务器的多个装置协同提供认证。

23. 发明授权

US5590138A Error correction apparatus 失效
标题翻译：纠错装置
公开(公告)号：US5590138A
公开(公告)日：1996-12-31
申请号：US400521
申请日：1995-03-07
申请人： Keiichi Iwamura
发明人： Keiichi Iwamura
IPC分类号： G06F7/72 , H03M13/15 , H03M13/35 , H03M13/00
CPC分类号： H03M13/35 , G06F7/724 , H03M13/15 , H03M13/151
摘要： An error correction apparatus is disclosed for use in erasure correction and error correction in transmission paths of devices such as optical disk devices, upon receipt of input data of various formats. The apparatus has a select signal generating circuit for generating, in response to the format of the input data, a select signal corresponding to the format of the input data. Also taught is an erasure correction and error correction circuit for conducting error correction which includes erasure correction; and a controlling circuit for controlling the erasure correction and error correction in accordance with the select signal so as to conduct correction in conformity with the format of the input data. Thus, erasure correction and error correction can be conducted, regardless of format of the input data.
摘要翻译：公开了一种纠错装置，用于在接收到各种格式的输入数据时用于诸如光盘装置的设备的传输路径中的擦除校正和纠错。该装置具有选择信号发生电路，用于根据输入数据的格式生成与输入数据格式对应的选择信号。还教导了用于进行纠错的消失校正和纠错电路，其包括消除校正; 以及控制电路，用于根据选择信号控制消失校正和纠错，以便根据输入数据的格式进行校正。因此，无论输入数据的格式如何，都可以进行擦除校正和纠错。

24. 发明授权

US5325373A Apparatus for encoding and decoding reed-solomon code 失效
标题翻译：用于对reed-solomon码进行编码和解码的装置
公开(公告)号：US5325373A
公开(公告)日：1994-06-28
申请号：US982062
申请日：1992-11-25
申请人： Keiichi Iwamura , Hideki Imai , Yasunori Dohi
发明人： Keiichi Iwamura , Hideki Imai , Yasunori Dohi
IPC分类号： H03M13/15 , G06F11/10
CPC分类号： H03M13/151
摘要： A Reed-Solomon coding decoder for use in error correction has a plurality of processing elements (PEs) each including a selector having a plurality of inputs and at least one output, a multiplier which receives as at least one of the inputs thereof the output from the selector, an adder for adding the outputs of the multiplier, and m-stages of registers for storing the outputs of the adder and the selector. The PEs are connected in a predetermined pattern to realize a compact construction of a Reed-Solomon code decoder.
摘要翻译：用于纠错的里德 - 所罗门编码解码器具有多个处理元件（PE），每个处理元件（PE）包括具有多个输入和至少一个输出的选择器，乘法器作为其至少一个输入接收来自选择器，用于将乘法器的输出相加的加法器和用于存储加法器和选择器的输出的寄存器的m级。 PE以预定模式连接，以实现Reed-Solomon码解码器的紧凑结构。

25. 发明授权

US5321752A Method of and apparatus for encryption and decryption of communication data 失效
标题翻译：通信数据的加密和解密方法和装置
公开(公告)号：US5321752A
公开(公告)日：1994-06-14
申请号：US941236
申请日：1992-09-04
申请人： Keiichi Iwamura , Takahisa Yamamoto
发明人： Keiichi Iwamura , Takahisa Yamamoto
IPC分类号： G06F7/72 , G07F7/10 , H04K1/00
CPC分类号： G07F7/1016 , G06F7/722 , G06F7/724 , G06F7/728 , G06F7/723
摘要： A method and apparatus which enables a circuit of a small circuit scale to perform high-speed modular multiplication or modular exponentiation which are necessary in encryption or decryption in cryptic communication. To this end, modular multiplication Q=A.multidot.M mod N and modular exponentiation C=M.sup.e mod N are executed by repetition of computation of Z=U.multidot.V.multidot.R.sup.-1 mod N employing an integer R which is prime to N. The repetition of computation is executed by repeatedly operating a single circuit or by simultaneously operating a plurality of circuits of the same construction in a parallel manner.
摘要翻译：一种方法和装置，使得小电路规模的电路能够执行在密码通信中加密或解密所必需的高速模乘或模幂运算。为此，通过使用N为素数的整数R重复Z = UxVxR-1 mod N的计算来执行乘法Q = AxM mod N和模幂运算C = Me mod N。重复计算由重复地操作单个电路或者以并行方式同时操作具有相同结构的多个电路。

26. 发明授权

US07546464B2 Network access terminal, network system, method of network system, storage medium, and program code 有权
标题翻译：网络接入终端，网络系统，网络系统方法，存储介质和程序代码
公开(公告)号：US07546464B2
公开(公告)日：2009-06-09
申请号：US10170707
申请日：2002-06-14
申请人： Junichi Hayashi , Keiichi Iwamura
发明人： Junichi Hayashi , Keiichi Iwamura
IPC分类号： H04L9/00 , H04N7/16
CPC分类号： H04N1/00127 , G06Q30/06 , H04L63/12 , H04N1/00244 , H04N2201/3249
摘要： When image data in which a digital watermark is embedded accesses a server, particularly, a Web server, via a network, the server is appropriately selected and accessed via the network in accordance with the environments of the clients that access the server. A network access terminal includes an extraction unit for extracting first information from an image that includes the first information, which is multi-valued, an acquisition unit for acquiring from a predetermined storage device the first information extracted by the extraction unit and address information specified by second information different from the first information, from among a plurality of address information stored in the predetermined storage device, and a communication unit for accessing an address based on the address information obtained by the acquisition unit.
摘要翻译：当其中嵌入有数字水印的图像数据经由网络访问服务器，特别是Web服务器时，根据访问服务器的客户端的环境，通过网络适当地选择和访问服务器。网络接入终端包括：提取单元，用于从包括多值的第一信息的图像中提取第一信息;获取单元，用于从预定的存储设备获取由提取单元提取的第一信息和由从存储在预定存储装置中的多个地址信息中的与第一信息不同的第二信息和用于基于由获取单元获得的地址信息访问地址的通信单元。

27. 发明授权

US07463736B2 Data process apparatus and method therefor 有权
标题翻译：数据处理装置及其方法
公开(公告)号：US07463736B2
公开(公告)日：2008-12-09
申请号：US10434161
申请日：2003-05-09
申请人： Nobuhiro Tagashira , Keiichi Iwamura , Junichi Hayashi , Yuji Suga
发明人： Nobuhiro Tagashira , Keiichi Iwamura , Junichi Hayashi , Yuji Suga
IPC分类号： H04N7/167
CPC分类号： H04N21/234327 , H04L9/0836 , H04N21/26613
摘要： In an image process apparatus, a key different for each level of hierarchy is generated on the basis of a specific key with respect to image data having a hierarchical structure, the image data in each level of the hierarchy is encrypted using the generated key for each level, and the specific key is managed, so that key management can be easily performed while the image data having a hierarchical structure is enciphered using different keys for each level of the hierarchy.
摘要翻译：在图像处理装置中，基于具有层次结构的图像数据的特定键生成针对每个层次的不同级别的关键字，使用所生成的密钥对层级的每个级别中的图像数据进行加密级别，并且特定密钥被管理，使得可以容易地执行密钥管理，同时使用层级结构的每个级别使用不同的密钥对具有分层结构的图像数据进行加密。

28. 发明授权

US07260238B2 Digital watermark embedding method, apparatus, digital watermark extraction method and apparatus 失效
标题翻译：数字水印嵌入方法，装置，数字水印提取方法及装置
公开(公告)号：US07260238B2
公开(公告)日：2007-08-21
申请号：US10727636
申请日：2003-12-05
申请人： Keiichi Iwamura , Kitahiro Kaneda , Jun Tamaru , Takami Eguchi
发明人： Keiichi Iwamura , Kitahiro Kaneda , Jun Tamaru , Takami Eguchi
IPC分类号： G06K9/00 , G06K9/34 , G06K15/00 , H04N1/40
CPC分类号： G06T1/0021 , G06T2201/0051 , G06T2201/0062
摘要： Distance d1 between the right edges of A1 and B2, and distance d2 between the right edges of A3 and B4 are calculated. If data to be embedded is 1, one or a combination of a process for increasing the size of B2 in the column direction or decreasing the size of B4 in the column and a process for moving the position of B2 toward B3 or moving the position of B4 toward B3 is executed to meet d1>d2. If data to be embedded is 0, one or a combination of a process for decreasing the size of B2 in the column direction or increasing the size of B4 in the column direction, and a process for moving the position of B2 toward B1 or moving the position of B4 toward B5 is executed to meet d1
摘要翻译：计算A 1和B 2的右边缘之间的距离d 1，以及A 3和B 4的右边缘之间的距离d 2。如果要嵌入的数据为1，则在列方向上增加B 2的大小或减小列中的B 4的大小的处理的一个或组合以及将B 2的位置移动到B 3的处理或将B 4的位置向B 3移动，以满足d 1> d 2。如果要嵌入的数据为0，则在列方向上减小B 2的大小或者增加列方向上的B 4的大小的处理的一个或组合，以及将B 2的位置移动到B的处理 1或将B 4的位置移向B 5，以满足d 1

29. 发明授权

US07206432B2 Extracting embedded information from digital image data 失效
标题翻译：从数字图像数据中提取嵌入信息
公开(公告)号：US07206432B2
公开(公告)日：2007-04-17
申请号：US10933295
申请日：2004-09-03
申请人： Keiichi Iwamura
发明人： Keiichi Iwamura
IPC分类号： G06K9/00
CPC分类号： G06T1/0071 , G06T2201/0051 , G06T2201/0052 , G06T2201/0061 , H04N1/32144 , H04N1/32149 , H04N1/32352 , H04N2201/3233 , H04N2201/327
摘要： The invention extracts third information, which includes first and second information, from image data. The first information (e.g., copyright information) is embedded in the image data using a public embedding method, and the second information (e.g., information used to detect if the copyright has been altered) is embedded in the image data using a private embedding method. The first information is then extracted from the third information using the second information.
摘要翻译：本发明从图像数据中提取包括第一和第二信息的第三信息。使用公共嵌入方法将第一信息（例如，版权信息）嵌入在图像数据中，并且使用私有嵌入方法将第二信息（例如，用于检测是否已经改变版权的信息）嵌入在图像数据中。然后使用第二信息从第三信息中提取第一信息。

30. 发明授权

US07190807B2 Digital watermark extracting method, apparatus, program and storage medium 失效
标题翻译：数字水印提取方法，装置，程序和存储介质
公开(公告)号：US07190807B2
公开(公告)日：2007-03-13
申请号：US10385852
申请日：2003-03-12
申请人： Jun Tamaru , Keiichi Iwamura
发明人： Jun Tamaru , Keiichi Iwamura
IPC分类号： G06K9/00
CPC分类号： G06T1/005 , G06T2201/0051 , G06T2201/0062 , G06T2201/0065 , G06T2201/0083
摘要： The invention is to precisely extract a digital watermark from image data which are subjected to embedding of the digital watermark in a state of a binary image and are then converted into a multi-value image (gray scale image).For attaining the foregoing object, a digital watermark extracting apparatus for extracting a digital watermark for example in an original includes an acquiring unit for acquiring multi-value image data obtained by reading the original with a predetermined reading unit, a pre-processing unit for selecting one of plural threshold values and binarizing the multi-value image data with the selected threshold value, and an extracting unit for extracting the digital watermark from image data binarized in the pre-processing unit, wherein selection of the threshold value, binarization an extraction of the digital watermark are repeated to obtain an optimum extraction result of the digital watermark.
摘要翻译：本发明是从二进制图像的状态中嵌入数字水印的图像数据精确地提取数字水印，然后转换为多值图像（灰度图像）。为了实现上述目的，例如在原件中提取数字水印的数字水印提取装置包括：获取单元，用于获取通过以预定读取单元读取原稿而获得的多值图像数据;预处理单元，用于选择多个阈值中的一个，并且利用所选择的阈值对多值图像数据进行二值化;以及提取单元，用于从预处理单元中二值化的图像数据中提取数字水印，其中选择阈值，二值化和提取重复数字水印以获得数字水印的最佳提取结果。

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