Key management method, encryption system, and sharing digital signature
system which have hierarchies
    62.
    发明授权
    Key management method, encryption system, and sharing digital signature system which have hierarchies 失效
    密钥管理方法,加密系统和具有层次结构的共享数字签名系统

    公开(公告)号:US6088454A

    公开(公告)日:2000-07-11

    申请号:US996132

    申请日:1997-12-22

    摘要: A key management method, an encryption system, and a sharing digital signature system are provided, which are designed to hierarchically manage the degrees of contribution of members to a digital signature operation and the like so as to be suitably used for a group having a hierarchical structure. In an information communication system including a plurality of information processing apparatuses connected to each other through a communication line, a first member (11a) holding a secret key K and a plurality of second members (11b-11d) holding pieces of partial information K.sub.1i (i=1, 2, . . . ) generated by secret sharing of the secret key K are provided. The first member can use the secret key K as a key for the information communication system, but the second members can obtain a key for the information communication system only by collecting a predetermined number t.sub.1 or more of pieces of partial information K.sub.1i.

    摘要翻译: 提供了一种密钥管理方法,加密系统和共享数字签名系统,其被设计为分级地管理成员对数字签名操作等的贡献度,以便适用于具有分级 结构体。 在包括通过通信线路相互连接的多个信息处理装置的信息通信系统中,保持秘密密钥K的第一部件(11a)和保持部分信息K1i的多个第二部件(11b〜11d) 提供了通过秘密密钥K的秘密共享产生的i = 1,2,...)。 第一成员可以使用秘密密钥K作为信息通信系统的密钥,但是第二成员只能通过收集预定数量的t1或更多的部分信息K1i来获得信息通信系统的密钥。

    Data processing apparatus and its method
    65.
    发明授权
    Data processing apparatus and its method 有权
    数据处理装置及其方法

    公开(公告)号:US07930544B2

    公开(公告)日:2011-04-19

    申请号:US11574089

    申请日:2005-10-25

    申请人: Keiichi Iwamura

    发明人: Keiichi Iwamura

    IPC分类号: H04L9/32

    摘要: A verification information generation system includes first and second data processing apparatuses. The first data processing apparatus has a unit holding first secret information, a unit receiving information associated with the second secret information from the second apparatus, a unit generating key information on the basis of the first secret information and the information associated with the second secret information, a unit generating key derivation auxiliary information allowing the key information to be derived from the second secret information, a unit generating verification information on the basis of information to be verified and the key information, and a unit outputting the information to be verified, the verification information, and the key derivation auxiliary information. The second secret information is information which is set in advance in the second data processing apparatus.

    摘要翻译: 验证信息生成系统包括第一和第二数据处理装置。 第一数据处理装置具有保持第一秘密信息的单元,从第二装置接收与第二秘密信息相关联的信息的单元,基于第一秘密信息和与第二秘密信息相关联的信息产生密钥信息的单元 产生密钥导出辅助信息的单元,其允许从第二秘密信息导出密钥信息;基于要验证的信息生成验证信息的单元和密钥信息;以及输出要验证的信息的单元, 验证信息和密钥导出辅助信息。 第二秘密信息是在第二数据处理装置中预先设定的信息。

    Data-processing system and method for controlling same, computer program, and computer-readable recording medium
    66.
    发明授权
    Data-processing system and method for controlling same, computer program, and computer-readable recording medium 有权
    数据处理系统及其控制方法,计算机程序和计算机可读记录介质

    公开(公告)号:US07594118B2

    公开(公告)日:2009-09-22

    申请号:US11208807

    申请日:2005-08-22

    申请人: Keiichi Iwamura

    发明人: Keiichi Iwamura

    IPC分类号: H04L9/00

    摘要: A data-processing system and method for controlling synthesizing digital-signature information. The system and method include holding first private-key information, inputting second private-key information, generating third private-key information based on the first private-key information and the second private-key information, holding the third private-key information, generating signature information based on information to be verified and the third private-key information, and outputting the information to be verified and the signature information.

    摘要翻译: 一种用于控制合成数字签名信息的数据处理系统和方法。 该系统和方法包括保持第一私钥信息,输入第二私钥信息,基于第一私钥信息和第二私钥信息生成第三私钥信息,保存第三私钥信息,产生 基于要验证的信息的签名信息和第三私钥信息,并输出要被验证的信息和签名信息。

    DATA-PROCESSING SYSTEM AND METHOD FOR CONTROLLING SAME, COMPUTER PROGRAM, AND COMPUTER-READABLE RECORDING MEDIUM
    67.
    发明申请
    DATA-PROCESSING SYSTEM AND METHOD FOR CONTROLLING SAME, COMPUTER PROGRAM, AND COMPUTER-READABLE RECORDING MEDIUM 审中-公开
    数据处理系统及其控制方法,计算机程序和计算机可读记录介质

    公开(公告)号:US20090187767A1

    公开(公告)日:2009-07-23

    申请号:US12411000

    申请日:2009-03-25

    申请人: Keiichi Iwamura

    发明人: Keiichi Iwamura

    IPC分类号: H04L9/30 H04L9/00

    摘要: A data-processing system and method for controlling synthesizing digital-signature information. The system and method include holding first private-key information, inputting second private-key information, generating third private-key information based on the first private-key information and the second private-key information, holding the third private-key information, generating signature information based on information to be verified and the third private-key information, and outputting the information to be verified and the signature information.

    摘要翻译: 一种用于控制合成数字签名信息的数据处理系统和方法。 该系统和方法包括保持第一私钥信息,输入第二私钥信息,基于第一私钥信息和第二私钥信息生成第三私钥信息,保存第三私钥信息,产生 基于要验证的信息的签名信息和第三私钥信息,并输出要被验证的信息和签名信息。

    Method and apparatus for embedding digital-watermark using robustness parameter
    68.
    发明授权
    Method and apparatus for embedding digital-watermark using robustness parameter 失效
    使用鲁棒性参数嵌入数字水印的方法和装置

    公开(公告)号:US07386149B2

    公开(公告)日:2008-06-10

    申请号:US11740770

    申请日:2007-04-26

    IPC分类号: G06K9/00

    摘要: An apparatus receives a document image and digital-watermark information and determines an embedding capacity based on a number of the letters in the document image. The apparatus determines whether or not the entire digital-watermark information is capable of being embedded in the document image based on the determined embedding capacity and embeds the digital-watermark information in the document image based on a result of the determination of whether or not the entire digital-watermark information is capable of being embedded in the document image.

    摘要翻译: 一种装置接收文件图像和数字水印信息,并且基于文档图像中的字母数确定嵌入容量。 该装置基于所确定的嵌入容量来确定整个数字水印信息是否能够被嵌入在文档图像中,并且基于确定的数字水印信息的结果将数字水印信息嵌入在文档图像中 整个数字水印信息能够嵌入在文档图像中。

    Digital watermark embedding method, digital watermark extraction method, digital watermark embedding apparatus, and digital watermark extraction apparatus
    69.
    发明授权
    Digital watermark embedding method, digital watermark extraction method, digital watermark embedding apparatus, and digital watermark extraction apparatus 失效
    数字水印嵌入方法,数字水印提取方法,数字水印嵌入装置和数字水印提取装置

    公开(公告)号:US07269274B2

    公开(公告)日:2007-09-11

    申请号:US10727637

    申请日:2003-12-05

    IPC分类号: G06K9/00 G06K9/34 G06K15/00

    CPC分类号: G06T1/0021

    摘要: An apparatus for embedding a digital watermark in a document image detects circumscribing outer shapes of characters in the document image and sets a plurality of reference lines that extend in the column direction and are spaced apart in the row direction by a basic pitch. The outer shapes include a first outer shape, a second outer shape that neighbors the first outer shape, and a third outer shape that neighbors the second outer shape, and the reference lines include a first reference line located between the first outer shape and the second outer shape, and a second reference line located between the second outer shape and the third outer shape. Control is performed for at least one of the second and third outer shapes so that a distance between the first reference line and an edge of the second outer shape is different from a distance between the second reference line and an edge of the third outer shape, in accordance with digital watermark information to be embedded.

    摘要翻译: 用于在文件图像中嵌入数字水印的装置检测文档图像中的外部字符的外形,并且设置在列方向上延伸并以行方向间隔开的基准间距的多个参考线。 外形包括第一外形,邻近第一外形的第二外形和与第二外形相邻的第三外形,并且参考线包括位于第一外形和第二外形之间的第一参考线 以及位于第二外形和第三外形之间的第二参考线。 对第二外形和第三外形中的至少一个执行控制,使得第一参考线与第二外形的边缘之间的距离不同于第二参考线与第三外形的边缘之间的距离, 根据要嵌入的数字水印信息。

    Information processing method, falsification verification method and device, storage medium, and program
    70.
    发明申请
    Information processing method, falsification verification method and device, storage medium, and program 失效
    信息处理方法,伪造验证方法和设备,存储介质和程序

    公开(公告)号:US20070172256A1

    公开(公告)日:2007-07-26

    申请号:US11352240

    申请日:2006-02-13

    申请人: Keiichi Iwamura

    发明人: Keiichi Iwamura

    IPC分类号: G03G15/22

    摘要: The secret data is acquired externally by making an arithmetic operation between unique information of an apparatus and the first information managed secretly, and secretly held as key data in a key holding part. A MAC generation part generates the authentication data based on a hash value obtained from the data to be protected and the key data held in the key holding part 21. An image file generation part generates an image file to provide the unique information and the authentication data together with the data to be protected.

    摘要翻译: 通过在设备的唯一信息和秘密地管理的第一信息之间进行算术运算,并且秘密地​​将其作为密钥数据保存在密钥保持部分中,从而获取秘密数据。 MAC生成部基于从要保护的数据获得的哈希值和保持在密钥保存部21中的密钥数据生成认证数据。 图像文件生成部件生成图像文件以提供唯一信息和认证数据以及要保护的数据。