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107 条记录 (耗时 0.046 秒)

    Image verification system
    91.
    发明授权
    Image verification system 失效
    图像验证系统

    公开(公告)号：US07162637B2

    公开(公告)日：2007-01-09

    申请号：US10323774

    申请日：2002-12-20

    申请人： Satoru Wakao ,  Keiichi Iwamura

    发明人： Satoru Wakao ,  Keiichi Iwamura

    IPC分类号： G06K9/00 ,  H04L9/00

    CPC分类号： G06T1/0021 ,  H04N1/32101 ,  H04N2201/3226 ,  H04N2201/3233 ,  H04N2201/3235 ,  H04N2201/3236 ,  H04N2201/3239

    摘要： An image verification system includes an imaging device and a first image verification device. The imaging device has an image generating unit which generates image data, and a first verification data generating unit which generates first verification data using the image data and common information. In the first image verification device, a first verification unit verifies whether or not the image data is modified using the image data, the first verification data, and the common information. If it is verified by the first verification unit the image data is not modified, an embedding unit embeds watermark data to detect a modified portion of the image data in order to generate watermarked image data. A second verification data generating unit generates second verification data using the watermarked image data and secret information.

    摘要翻译： 图像验证系统包括成像装置和第一图像验证装置。 成像装置具有生成图像数据的图像生成部，以及使用图像数据和公共信息生成第一验证数据的第一验证数据生成部。 在第一图像验证装置中，第一验证单元使用图像数据，第一验证数据和公共信息来验证图像数据是否被修改。 如果由第一验证单元验证图像数据未被修改，则嵌入单元嵌入水印数据以检测图像数据的修改部分，以便生成带水印的图像数据。 第二验证数据生成单元使用水印图像数据和秘密信息生成第二验证数据。

    IMAGE DATA VERIFICATION
    92.
    发明申请
    IMAGE DATA VERIFICATION 有权
    图像数据验证

    公开(公告)号：US20060248348A1

    公开(公告)日：2006-11-02

    申请号：US11278749

    申请日：2006-04-05

    申请人： SATORU WAKAO ,  Keiichi Iwamura ,  Yasuhiro Nakamoto

    发明人： SATORU WAKAO ,  Keiichi Iwamura ,  Yasuhiro Nakamoto

    IPC分类号： H04K1/00

    CPC分类号： H04N1/32101 ,  H04L9/3247 ,  H04L2209/30 ,  H04N2201/3205 ,  H04N2201/3235 ,  H04N2201/3236

    摘要： An image verification system includes an image input apparatus, image verification apparatus, and database apparatus. The image input apparatus generates verification information for image data by using a private key and adds the verification information and predetermined information unique to the image input apparatus to the image data. The image verification apparatus verifies that the image data has been altered or not by using the verification information and a public key corresponding to the private key. The database apparatus stores the public key in association with the predetermined information in the a storage unit and provides the public key to the image verification apparatus.

    摘要翻译： 图像验证系统包括图像输入装置，图像验证装置和数据库装置。 图像输入装置通过使用私钥生成图像数据的验证信息，并将验证信息和图像输入装置唯一的预定信息与图像数据相加。 图像验证装置通过使用验证信息和与私钥对应的公开密钥来验证图像数据是否被改变。 数据库装置将与预定信息相关联的公钥存储在存储单元中，并将公钥提供给图像验证装置。

    Image processor and image processing method
    94.
    发明授权
    Image processor and image processing method 失效
    图像处理器和图像处理方法

    公开(公告)号：US06959385B2

    公开(公告)日：2005-10-25

    申请号：US09824746

    申请日：2001-04-04

    申请人： Tomochika Murakami ,  Keiichi Iwamura ,  Yoshihiro Ishida

    发明人： Tomochika Murakami ,  Keiichi Iwamura ,  Yoshihiro Ishida

    IPC分类号： G06K9/52 ,  G06T1/00 ,  G06T7/00 ,  H04N1/32 ,  H04N1/387 ,  H04L9/00 ,  G06K9/32 ,  G06K9/36

    CPC分类号： G06Q20/401 ,  G06K9/522 ,  G06T1/0064 ,  G06T7/73 ,  H04N1/32149 ,  H04N1/3216 ,  H04N1/32352 ,  H04N2201/327

    摘要： To provide a device capable of determining uniquely the direction of rotation applied to an image and extracting digital watermark information correctly even in the case where a registration signal having a symmetric axis is embedded. A device for enabling digital watermark information to be extracted from image data having the digital watermark information embedded therein in such a manner that it can hardly be perceived by human eyes, in which processing for extracting rotation information and position information from the image data is performed plural times for rotation angles different from one another. For extracted position and rotation information, confidence coefficients indicating accuracy thereof are calculated. The position and rotation angle at which the digital watermark information is embedded are determined based on the confidence coefficients.

    摘要翻译： 提供能够唯一地确定施加到图像的旋转方向并且即使在具有对称轴的配准信号被嵌入的情况下也能正确地提取数字水印信息的装置。 一种用于使得能够以其数字水印信息嵌入其中的数字水印信息被提取的装置，使得它几乎不被人眼感知，其中执行从图像数据提取旋转信息和位置信息的处理 对于彼此不同的旋转角度，多次。 对于提取的位置和旋转信息，计算表示其精度的置信系数。 基于置信系数确定嵌入数字水印信息的位置和旋转角度。

    Data processing apparatus and method, and storage medium therefor
    95.
    发明申请
    Data processing apparatus and method, and storage medium therefor 失效
    数据处理装置及方法及其存储介质

    公开(公告)号：US20050185820A1

    公开(公告)日：2005-08-25

    申请号：US11078376

    申请日：2005-03-14

    申请人： Jun Yoshida ,  Keiichi Iwamura

    发明人： Jun Yoshida ,  Keiichi Iwamura

    IPC分类号： G06F21/00 ,  G06K1/00 ,  G06K9/00 ,  G06T1/00

    CPC分类号： G06F21/10 ,  G06F2221/0737 ,  G06T1/0021

    摘要： The primary objective of the present invention is the prevention, or the detection, of an illegal act involving digital contents. To achieve this objective, whether an illegal procedure involving digital contents has been performed is determined based on results obtained by performing a predetermined operation for at least a part of the digital contents, and a predetermined process is performed for the digital contents in accordance with the results of determination.

    摘要翻译： 本发明的主要目的是预防或检测涉及数字内容的非法行为。 为了实现该目的，基于通过对数字内容的至少一部分执行预定操作而获得的结果来确定是否执行涉及数字内容的非法程序，并且根据该数字内容执行预定处理 测定结果。

    Electronic watermarking method, digital information distribution system using such method, and storage medium storing program of such method
    97.
    发明授权
    Electronic watermarking method, digital information distribution system using such method, and storage medium storing program of such method 失效
    电子水印方法，使用这种方法的数字信息分发系统，以及这种方法的存储介质存储程序

    公开(公告)号：US06560339B1

    公开(公告)日：2003-05-06

    申请号：US09248975

    申请日：1999-02-12

    申请人： Keiichi Iwamura

    发明人： Keiichi Iwamura

    IPC分类号： H04N7167

    CPC分类号： H04N21/63775 ,  H04N7/1675 ,  H04N21/2347 ,  H04N21/25875 ,  H04N21/8358

    摘要： An electronic watermarking method includes the steps of generating a plurality piece of information with different electronic watermark information, generating a plurality piece of encrypted information through encryption of the plurality piece of information with each independent encryption key, generating a plurality of encrypted encryption keys through encryption of each independent encryption key with each different encryption key, transmitting the plurality piece of encrypted information and the plurality of encrypted encryption keys to a user, the first to fourth steps being executed by a server, and selecting each pair of a piece of the plurality of encrypted information and a corresponding encrypted encryption key, the fifth step being executed by the user, wherein only some of the encryption keys are multiplied by random numbers.

    摘要翻译： 电子水印方法包括以下步骤：利用不同的电子水印信息生成多条信息，通过加密每条独立的加密密钥生成多条加密信息，通过加密生成多个加密的加密密钥 每个独立加密密钥与每个不同的加密密钥，将多条加密信息和多个加密加密密钥发送给用户，第一至第四步骤由服务器执行，并且选择每一对一个多个加密密钥 的加密信息和相应的加密加密密钥，第五步由用户执行，其中只有一些加密密钥乘以随机数。

    Communication network for encrypting/deciphering communication text while updating encryption key, a communication terminal thereof, and a communication method thereof
    99.
    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。