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    Method of and apparatus for encryption and decryption of communication data
    1.
    发明授权
    Method of and apparatus for encryption and decryption of communication data 失效
    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。

    Pseudo-random number generator and communication system employing the same
    2.
    发明授权
    Pseudo-random number generator and communication system employing the same 失效
    伪随机数发生器及其采用的通信系统

    公开(公告)号：US5828752A

    公开(公告)日：1998-10-27

    申请号：US402366

    申请日：1995-03-13

    申请人： Keiichi Iwamura ,  Takahisa Yamamoto

    发明人： Keiichi Iwamura ,  Takahisa Yamamoto

    IPC分类号： G09C1/00 ,  H04L9/22 ,  H04L9/00 ,  G06F7/58

    CPC分类号： H04L9/0662 ,  H04L2209/12

    摘要： A communication apparatus through which encryption/decryption processing can be executed at high speed includes a CPU for performing overall control of the apparatus, an encryption unit for encrypting communication data that has been stored in a RAM and outputting encrypted data, and a decryption unit for decrypting encrypted data transmitted from an external communication apparatus and storing the decrypted data in the RAM. The decryption unit issues a request to generate a series of random numbers serving as an encryption key necessary in decryption processing of the encrypted data applied thereto. A pseudo-random number generating circuit generates random numbers and delivers them to the decryption unit. The encryption unit issues a request to generate a series of random numbers serving as an encryption key necessary in encryption. The pseudo-random number generating circuit generates random numbers and delivers them to the encryption unit. The latter generates a cryptogram sentence based upon these random numbers.

    摘要翻译： 可以高速执行加密/解密处理的通信装置包括用于执行装置的总体控制的CPU，用于加密存储在RAM中并输出加密数据的通信数据的加密单元，以及用于 解密从外部通信装置发送的加密数据，并将解密的数据存储在RAM中。 解密单元发出请求，生成一系列作为加密数据的加密密钥所必需的加密密钥的随机数。 伪随机数生成电路生成随机数并将其传送到解密单元。 加密单元发出请求以产生用作加密中所需的加密密钥的一系列随机数。 伪随机数生成电路生成随机数并将其传送到加密单元。 后者基于这些随机数生成密码句。

    Communication network for encrypting/deciphering communication text while updating encryption key, a communication terminal thereof, and a communication method thereof
    4.
    发明授权
    Communication network for encrypting/deciphering communication text while updating encryption key, a communication terminal thereof, and a communication method thereof 失效
    用于在更新加密密钥时对通信文本进行加密/解密的通信网络，其通信终端及其通信方法

    公开(公告)号：US06307940B1

    公开(公告)日：2001-10-23

    申请号：US09104279

    申请日：1998-06-25

    申请人： Takahisa Yamamoto ,  Keiichi Iwamura

    发明人： Takahisa Yamamoto ,  Keiichi Iwamura

    IPC分类号： H04L900

    CPC分类号： H04L9/0662 ,  H04L2209/125

    摘要： In a cryptosystem which performs encryption/deciphering of communication text using k bits of cryptographically secure pseudo-random numbers as the block cipher key thereof, the block cipher key is updated each time j=k/m bits of new pseudo-random numbers are generated, with the j·m=k bits of pseudo-random numbers created by combining the j·(m−1) bits within the k bits of the present key and the newly generated j bits, serving as a new key, thereby shortening the updating cycle and improving the safety. Also, by sending the number of times of generation of pseudo-random numbers along with the encrypted communication text from the sending side, and by the receiving side using from the sequentially generated pseudo-random numbers, pseudo-random numbers generated after the received number of times of generation as the new key, deciphering can be performed regardless of the order to reception, in the event that a plurality of cipher texts are sequentially sent while updating the encryption key.

    摘要翻译： 在使用加密安全伪随机数的k位进行通信文本的加密/解密的密码系统作为其密码密钥，每当j = k / m个比特的新伪随机数被生成时，更新块密码密钥 通过组合当前密钥的k个比特中的j（m-1）比特和新生成的j比特来创建的伪随机数的jm = k比特，从而缩短更新周期 并提高安全性。 此外，通过从发送侧发送伪随机数生成次数和加密通信文本的次数，并且通过从顺序生成的伪随机数使用接收侧，在接收到的数目之后生成的伪随机数 的生成次数作为新密钥，在多个密文被更新加密密钥的情况下，可以执行无论接收顺序如何的解密。

    Method and network for communicating between a group of entities a text encrypted using an encryption key intrinsic to the group of entities in a network having a plurality of entities and a center
    5.
    发明授权
    Method and network for communicating between a group of entities a text encrypted using an encryption key intrinsic to the group of entities in a network having a plurality of entities and a center 失效
    用于在一组实体之间通信使用具有多个实体的网络中的实体组所固有的加密密钥加密的文本的通信方法和网络，以及中心

    公开(公告)号：US5966449A

    公开(公告)日：1999-10-12

    申请号：US359636

    申请日：1994-12-20

    申请人： Keiichi Iwamura ,  Takahisa Yamamoto

    发明人： Keiichi Iwamura ,  Takahisa Yamamoto

    IPC分类号： G06F13/00 ,  G06F12/14 ,  G09C1/00 ,  G09C1/10 ,  H04L9/08 ,  H04L9/00

    CPC分类号： H04L9/0847

    摘要： In a network having a plurality of entities and a center, the center creates random numbers for all the combinations of two of the entities within the network, and delivers to each entity random numbers created for those combinations involving that entity. A sender entity selects a random number corresponding to the combination of that entity and the destination entity from a group of random numbers delivered to the sender entity, encrypts a communication text using an encryption key determined by the selected random number and sends the encrypted text to the destination entity. The destination entity selects a random number corresponding to the combination of itself and the sender entity from the random numbers delivered to the destination entity, and decodes a cipher text received using an encryption key determined by the selected random number.

    摘要翻译： 在具有多个实体和中心的网络中，中心为网络内的两个实体的所有组合创建随机数，并且向每个实体递送为涉及该实体的那些组合创建的随机数。 发送者实体从发送到发送者实体的随机数组中选择与该实体和目的实体的组合相对应的随机数，使用由所选择的随机数确定的加密密钥加密通信文本，并将加密文本发送到 目的地实体。 目的实体从发送到目的地实体的随机数中选择与其本身和发送者实体的组合相对应的随机数，并使用由所选择的随机数确定的加密密钥解码接收到的密文。

    Encryption apparatus, communication system using the same and method therefor
    6.
    发明授权
    Encryption apparatus, communication system using the same and method therefor 失效
    加密装置，使用该装置的通信系统及其方法

    公开(公告)号：US5600720A

    公开(公告)日：1997-02-04

    申请号：US277512

    申请日：1994-07-19

    申请人： Keiichi Iwamura ,  Takahisa Yamamoto

    发明人： Keiichi Iwamura ,  Takahisa Yamamoto

    IPC分类号： H04L9/22 ,  H04L9/26

    CPC分类号： H04L9/0668 ,  H04L2209/12

    摘要： In order to attain high speed and secure encryption, a communication apparatus comprises a random number generation circuit for sequentially generating random number sequences which assure difficulty in terms of amount of calculation in cryptoanalyzing the sequences based on output sequences while using a cryptographic key shared by partner stations as an initial value, and an encryption circuit for sequentially encrypting communication texts and outputting cryptograms in a transmitting station and sequentially cryptoanalyzing the cryptograms and outputting the same in a receiving station, faster than the sequential generation of the random numbers by the random number generation circuit.

    摘要翻译： 为了获得高速度和安全的加密，通信装置包括随机数生成电路，用于依次产生随机数序列，这些随机数序列确保在使用由对方共享的加密密钥的情况下基于输出序列进行密码分析的序列的计算量方面的困难 电台作为初始值，以及加密电路，用于顺序地加密通信文本并在发送站中输出密码，并且在接收站中顺序地密码分析密码并将其输出，比通过随机数生成的随机数的顺序生成更快 电路。

    Image processor, method thereof, computer program, and computer readable storage medium
    8.
    发明授权
    Image processor, method thereof, computer program, and computer readable storage medium 失效
    图像处理器，其方法，计算机程序和计算机可读存储介质

    公开(公告)号：US07571323B2

    公开(公告)日：2009-08-04

    申请号：US10759364

    申请日：2004-01-16

    申请人： Keiichi Iwamura ,  Kitahiro Kaneda

    发明人： Keiichi Iwamura ,  Kitahiro Kaneda

    IPC分类号： H04L9/00 ,  G06K9/00

    CPC分类号： H04N1/00846 ,  G06T1/0021 ,  G06T2201/0051 ,  G06T2201/0062 ,  H04N1/00005 ,  H04N1/00037 ,  H04N1/00864 ,  H04N1/00867 ,  H04N1/0087 ,  H04N1/00875 ,  H04N1/00883 ,  H04N1/32144 ,  H04N2201/3246 ,  H04N2201/327

    摘要： A method for image processing comprising inputting and reading a combined image that includes a latent image unperceivable by the human eye, a patterned image in the background allowing the latent image to appear clearly on a recording medium when data recorded on a recording medium is copied onto another recording medium, and text and/or image data embedded with a digital watermark. The text and/or image data is extracted from the combined image and the digital watermark extracted from the text and/or image data. A permission code enabling copying of image data composed of a combination of a patterned image and the extracted text and/or image data onto a recording medium is input. The copying is regulated based on the extracted digital watermark and the permission code.

    摘要翻译： 一种用于图像处理的方法，包括输入和读取包括人眼不可察觉的潜像的组合图像，背景中的图案化图像，允许潜像在记录介质上记录的数据被复制到记录介质上清晰地显示在其上 另一种记录介质，以及嵌入数字水印的文本和/或图像数据。 从组合图像和从文本和/或图像数据提取的数字水印中提取文本和/或图像数据。 输入允许将由图案化图像和提取的文本和/或图像数据的组合组成的图像数据复制到记录介质上的许可代码。 基于提取的数字水印和许可代码对复制进行调整。

    Information processing apparatus, method therefor, computer program, and computer-readable storage medium
    9.
    发明授权
    Information processing apparatus, method therefor, computer program, and computer-readable storage medium 有权
    信息处理装置及其方法，计算机程序和计算机可读存储介质

    公开(公告)号：US07552335B2

    公开(公告)日：2009-06-23

    申请号：US10712869

    申请日：2003-11-12

    申请人： Keiichi Iwamura

    发明人： Keiichi Iwamura

    IPC分类号： H04L9/00

    CPC分类号： H04N1/32128 ,  H04N2201/3233 ,  H04N2201/3245 ,  H04N2201/3274 ,  H04N2201/3278

    摘要： The present invention provides a technique that allows for a valid modification that is authorized by the author of data, while assuring the originality of the data. An information processing apparatus for processing original data created by a predetermined author is provided. The information processing apparatus includes a modification-information storing unit for storing modification information regarding a modification onto a storage medium when the original data is modified, and a modification-assuring-information creating unit for creating modification assuring information for assuring that the modification information is true.

    摘要翻译： 本发明提供了一种技术，其允许由数据作者授权的有效修改，同时确保数据的原创性。 提供了一种用于处理由预定作者创建的原始数据的信息处理装置。 该信息处理装置包括修改信息存储单元，用于当修改原始数据时将关于修改的修改信息存储到存储介质上;修改信息创建单元，用于创建修改确保信息以确保修改信息为 真正。

    Image data verification system
    10.
    发明授权
    Image data verification system 失效
    图像数据验证系统

    公开(公告)号：US07535488B2

    公开(公告)日：2009-05-19

    申请号：US09987832

    申请日：2001-11-16

    申请人： Satoru Wakao ,  Keiichi Iwamura

    发明人： Satoru Wakao ,  Keiichi Iwamura

    IPC分类号： H04N5/225 ,  H04N7/167 ,  H04L9/00

    CPC分类号： H04N1/32128 ,  H04L9/3247 ,  H04L2209/60 ,  H04N2201/3205 ,  H04N2201/3235 ,  H04N2201/3236 ,  H04N2201/3274 ,  H04N2201/3278

    摘要： An image verification system has an image generation device and a first image verification device. The image generation device includes (a) an image data generation unit that generates image data, and (b) a first verification data generation unit that generates first verification data from the image data using a common key in common key cryptography. The first image verification device includes (a) a first verification unit that verifies, using the image data, the first verification data and the common key, whether the image data is altered, and (b) a second verification data generation unit that generates second verification data from the image data using a private key in public key cryptography without editing the image data, if the first verification unit verifies that the image data is not altered.

    摘要翻译： 图像验证系统具有图像生成装置和第一图像验证装置。 图像生成装置包括：（a）生成图像数据的图像数据生成单元，以及（b）第一验证数据生成单元，其使用公共密钥加密中的公共密钥从图像数据生成第一验证数据。 第一图像验证装置包括：（a）第一验证单元，其使用图像数据验证第一验证数据和公共密钥，是否改变图像数据;以及（b）生成第二验证数据的第二验证数据生成单元 如果第一验证单元验证图像数据未被改变，则使用公共密钥加密中的专用密钥从图像数据获得的验证数据，而不编辑图像数据。