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11. 发明授权

US08719578B2 Document verifying apparatus, document verifying method, and computer product 有权
标题翻译：文件验证装置，文件验证方法和计算机产品
公开(公告)号：US08719578B2
公开(公告)日：2014-05-06
申请号：US12492592
申请日：2009-06-26
申请人： Tetsuya Izu , Masahiko Takenaka
发明人： Tetsuya Izu , Masahiko Takenaka
IPC分类号： H04L9/00
CPC分类号： H04L9/3236 , H04L9/3247 , H04L2209/60 , H04L2209/88
摘要： A computer-readable recording medium stores therein a document verifying program. The document verifying program causes a computer to execute receiving input of an electronic document; dividing the electronic document received into arbitrary components; calculating a hash value for each of the components; correlating, for each component, the hash value calculated for the component and a random number allocated to the component according to an appearance position of the component in the electronic document; creating for each component and based on the hash value and the random number correlated for the component at the correlating, a first digital signature and a second digital signature that are different from each other; and appending to each component, the first digital signature and the second digital signature created for the component at the creating.
摘要翻译：计算机可读记录介质中存储有文档验证程序。文档验证程序使计算机执行电子文档的接收输入; 将收到的电子文档分成任意组成部分; 计算每个组件的散列值; 根据电子文档中的组件的外观位置，为每个组件分配针对组件计算的散列值和分配给组件的随机数; 为每个组件创建并基于哈希值和在相关的组件相关的随机数，第一数字签名和第二数字签名彼此不同; 并附加到每个组件，在创建时为组件创建的第一个数字签名和第二个数字签名。

12. 发明授权

US08533483B2 Data processing apparatus and digital signature method 有权
标题翻译：数据处理装置和数字签名方法
公开(公告)号：US08533483B2
公开(公告)日：2013-09-10
申请号：US12884476
申请日：2010-09-17
申请人： Tetsuya Izu , Masahiko Takenaka
发明人： Tetsuya Izu , Masahiko Takenaka
IPC分类号： H04L29/06
CPC分类号： G06F21/64
摘要： A data processing apparatus includes, an input unit to accept information on one or more deletion-target data blocks specified from a plurality of data blocks, a hash generating unit to calculate a hash value of each of the plurality of data blocks, an auxiliary data generating unit to calculate auxiliary data β=gH1(mod N) of a signer based on predetermined values g and N and a product H1 of the hash values of one or more deletion-target data blocks, a digital signature generating unit to calculate intermediate data α=gH2(mod N) based on the predetermined values g and N and a product H2 of the hash values of one or more remaining data blocks to generate a digital signature for a combination of the intermediate data α and position data of one or more deletion-target data blocks with a signing key of a modifier.
摘要翻译：数据处理装置包括：输入单元，接受关于从多个数据块指定的一个或多个删除目标数据块的信息;散列生成单元，用于计算多个数据块中的每一个的散列值;辅助数据生成单元，基于预定值g和N以及一个或多个删除目标数据块的哈希值的乘积H1来计算签名者的辅助数据β= gH1（mod N），计算中间数据的数字签名生成单元基于预定值g和N的α= gH2（mod N）以及一个或多个剩余数据块的哈希值的乘积H2，以生成用于中间数据α和一个或多个的位置数据的组合的数字签名具有修饰符的签名密钥的删除目标数据块。

13. 发明授权

US08452973B2 Digital signature method, program, and apparatus 有权
标题翻译：数字签名方法，程序和装置
公开(公告)号：US08452973B2
公开(公告)日：2013-05-28
申请号：US12688952
申请日：2010-01-18
申请人： Tetsuya Izu , Masahiko Takenaka
发明人： Tetsuya Izu , Masahiko Takenaka
IPC分类号： H04L9/32
CPC分类号： H04L9/3247 , H04L9/3236
摘要： A method for generating a digital signature with respect to an electronic document, the method including: inputting a target electronic document and a corresponding digital signature σ; dividing the target electronic document into a plurality of partial documents mi; and when a revision of the partial documents is to be performed, in a case where deletion of the one partial document is to be performed, when sanitization is not prohibited, exponentiating the digital signature σ twice with a hash value Gi, when sanitization is prohibited, exponentiating σ with the Gi; in a case where sanitization is to be performed, replacing a partial document by Gi; in a case where deletion is to be prohibited, exponentiating σ with a hash value Hi; in a case where the sanitization is to be prohibited, exponentiating σ with Gi; and updating σ.
摘要翻译：一种用于生成关于电子文档的数字签名的方法，所述方法包括：输入目标电子文档和对应的数字签名σ; 将目标电子文档划分为多个部分文档mi; 并且当要执行部分文档的修订时，在要执行删除一个部分文档的情况下，当不禁止消毒时，使用散列值Gi将数字签名西格玛取代两次，当禁止消毒时，与Gi相关的西格玛在要进行消毒的情况下，用Gi代替部分文件; 在要禁止删除的情况下，具有哈希值Hi的指数化Σ 在禁止消毒的情况下，用Gi代替西格玛; 并更新西格玛。

14. 发明授权

US08433913B2 Apparatus, method, and program for digital signature 有权
标题翻译：数字签名的装置，方法和程序
公开(公告)号：US08433913B2
公开(公告)日：2013-04-30
申请号：US12645469
申请日：2009-12-22
申请人： Masahiko Takenaka , Tetsuya Izu
发明人： Masahiko Takenaka , Tetsuya Izu
IPC分类号： H04L9/32
CPC分类号： H04L9/3236 , H04L9/3247
摘要： A digital signature method to generate a signature for an electronic document, the method including: initializing a signature t of each of the document segments of electronic document and twice raising the signature t to the power of a hash value of each of the document segments and digitally signing the raised signature to produce a signature s serving as the signature of the electronic document; and revising a document segment; wherein, in the revising, to delete a document segment, the signature t is raised twice to the power of the hash value of the document segment unless the document segment is sanitization prohibited, or the signature t is raised to the power of the hash value of the document if the document segment is sanitization prohibited, and the document segment is deleted; to sanitize a document segment, the document segment is replaced with the hash value thereof.
摘要翻译：一种用于生成电子文档的签名的数字签名方法，所述方法包括：初始化电子文档的每个文档段的签名t，并将签名t两次提升为每个文档段的哈希值的权力，以及对提出的签名进行数字签名，以生成作为电子文件签名的签名; 并修改文件段; 其中，在修改中，为了删除文档片段，将签名t提高到文档片段的散列值的两倍，除非文档片段被禁止消毒，或者将签名t提高到散列值的幂如果文件段被禁用，文件段被删除; 为了对文档段进行清理，文档段被替换为其散列值。

15. 发明申请

US20060093137A1 Elliptic curve cryptosystem apparatus, elliptic curve cryptosystem method, elliptic curve cryptosystem program and computer readable recording medium storing the elliptic curve cryptosystem program 有权
标题翻译：椭圆曲线密码系统装置，椭圆曲线密码系统方法，椭圆曲线密码系统程序和存储椭圆曲线密码系统程序的计算机可读记录介质
公开(公告)号：US20060093137A1
公开(公告)日：2006-05-04
申请号：US11311590
申请日：2005-12-16
申请人： Tetsuya Izu , Kouichi Itoh , Masahiko Takenaka , Naoya Torii
发明人： Tetsuya Izu , Kouichi Itoh , Masahiko Takenaka , Naoya Torii
IPC分类号： H04L9/30
CPC分类号： G06F7/725 , G06F2207/7223 , G06F2207/7228 , H04L9/003 , H04L9/3066 , H04L2209/08
摘要： An elliptic curve cryptosystem apparatus performing an elliptic curve cryptosystem process has a coordinate transforming unit for transforming coordinates (X:Y:Z) on a point P on an elliptic curve over a finite field GF(pˆm) to coordinates (r1×(X−s1):r2×(Y−s2):r3×(Z−s3)) (where, p is a prime number, m is an integer not less than 1, r1, r2 and r3 are integers not less than 1 and not larger than (p−1), s1, s2 and s3 are integer not less than 0 and not larger than (p−1), and a code “ˆ” represents power), and a scalar multiplication operating unit for performing scalar multiplication on the point on the elliptic curve transformed by the coordinate transforming unit, wherein at least one of the parameters s1, s2 and s3 has a value other than 0. The apparatus can perform the scalar multiplication in the elliptic curve cryptosystem, with resistance to side channel attacks.
摘要翻译：执行椭圆曲线密码系统处理的椭圆曲线密码系统装置具有坐标变换单元，用于将有限域GF（pm）上的椭圆曲线上的点P上的坐标（X：Y：Z）变换为坐标（r1x（X-s1 ）：r2x（Y-s2）：r3x（Z-s3））（其中，p是质数，m是不小于1的整数，r1，r2和r3是不小于1且不大于 p-1），s1，s2和s3是不小于0且不大于（p-1）的整数，代码“”表示功率），以及标量乘法运算单元，用于对该点上的点进行标量乘法由坐标变换单元变换的椭圆曲线，其中，参数s1，s2和s3中的至少一个具有不同于0的值。该装置可以执行椭圆曲线密码系统中具有抗侧信道攻击的标量乘法。

16. 发明申请

US20050152541A1 Tamper-proof elliptic encryption with private key 有权
标题翻译：具有私钥的防篡改椭圆加密
公开(公告)号：US20050152541A1
公开(公告)日：2005-07-14
申请号：US11045111
申请日：2005-01-31
申请人： Masahiko Takenaka , Tetsuya Izu , Kouichi Itoh , Naoya Torii
发明人： Masahiko Takenaka , Tetsuya Izu , Kouichi Itoh , Naoya Torii
IPC分类号： G06F7/72 , G09C1/00 , H04K1/00 , H04L9/30
CPC分类号： G06F7/725 , G06F2207/7223
摘要： An encryption device (FIG. 15) performs elliptic curve encryption using a secret key. The encryption device includes: operation means (ECDBL, ECADD) for performing scalar multiplication of a point on an elliptic curve; storage (T[0]-T[2]) having a plurality of data storing areas; and means (SEL) for determining, in accordance with a bit sequence of a given value (d) and with a random value (RNG), an address of one of the plurality of data storage areas that is to be coupled to the operation means for each scalar multiplication.
摘要翻译：使用秘密密钥进行加密装置（图15

17. 发明授权

US08391477B2 Cryptographic device having tamper resistance to power analysis attack 有权
标题翻译：具有抗电力分析攻击的加密设备
公开(公告)号：US08391477B2
公开(公告)日：2013-03-05
申请号：US11782168
申请日：2007-07-24
申请人： Tetsuya Izu , Kouichi Itoh , Masahiko Takenaka
发明人： Tetsuya Izu , Kouichi Itoh , Masahiko Takenaka
IPC分类号： H04K1/00 , H04L9/00 , G06F7/58 , G06F11/30 , G06F12/14
CPC分类号： H04L9/3066 , G06F7/725 , G06F2207/7238 , H04L9/003 , H04L9/302 , H04L2209/08 , H04L2209/127
摘要： A randomly selected point on an elliptic curve is set as the initial value of a variable and calculation including a random point value is performed in an algorithm for calculating arbitrary scalar multiple operation on an elliptic curve when scalar multiplication and addition on an elliptic curve are defined, then a calculation value obtained as a result of including a random point is subtracted from the calculation result, whereby an intended scalar multiple operation value on an elliptic curve is determined.
摘要翻译：将椭圆曲线上随机选择的点设置为变量的初始值，并且在用于在椭圆曲线上计算任意标量多次操作的算法中执行包括随机点值的计算，当在椭圆曲线上进行标量乘法和加法时，，则从计算结果中减去作为包括随机点的结果而获得的计算值，由此确定椭圆曲线上的期望标量多重操作值。

18. 发明授权

US08312266B2 Methods and apparatus for verifying electronic mail 有权
标题翻译：用于验证电子邮件的方法和装置
公开(公告)号：US08312266B2
公开(公告)日：2012-11-13
申请号：US12166971
申请日：2008-07-02
申请人： Takashi Yoshioka , Masahiko Takenaka , Tetsuya Izu
发明人： Takashi Yoshioka , Masahiko Takenaka , Tetsuya Izu
IPC分类号： H04L29/06
CPC分类号： H04L63/126 , H04L51/00 , H04L63/123
摘要： A computer extracts the header information from an electronic mail, including an originality guarantee. The computer generates a header characterization for the header information subject to originality guarantee, and extracts message body information from the electronic mail and generates a body characterization for the message body information as well. The generated characterization set applies the header characterization and the body characterization, combined. The verification information is added to the generated characterization set for applying a signature, and characterization set is linked to electronic mail.
摘要翻译：计算机从电子邮件中提取标题信息，包括原创性保证。计算机产生头文件标题，以保证原始性，并从电子邮件中提取消息体信息，并生成消息体信息的身体特征。生成的特征集合应用头部表征和身体表征，组合。将验证信息添加到生成的表征集中以应用签名，并且表征集与电子邮件相关联。

19. 发明申请

US20100232601A1 ELLIPTIC CURVE ARITHMETIC PROCESSING UNIT AND ELLIPTIC CURVE ARITHMETIC PROCESSING PROGRAM AND METHOD 审中-公开
标题翻译：椭圆曲线算术处理单元和椭圆曲线算术处理程序和方法
公开(公告)号：US20100232601A1
公开(公告)日：2010-09-16
申请号：US12688033
申请日：2010-01-15
申请人： Kouichi ITOH , Dai Yamamoto , Tetsuya Izu , Masahiko Takenaka , Kazuyoshi Furukawa
发明人： Kouichi ITOH , Dai Yamamoto , Tetsuya Izu , Masahiko Takenaka , Kazuyoshi Furukawa
IPC分类号： H04L9/28
CPC分类号： G06F7/725 , G06F2207/7271
摘要： An apparatus for executing cryptographic calculation on the basis of an elliptic point on an elliptic curve includes: a memory for storing a first value including a plurality of digits; and a processor for executing a process including: obtaining a second value representing a point on the elliptic curve; calculating output values by using a predetermined equation, each digit of the first value, and the second value; determining whether at least one of the second value and the output values indicates a point of infinity; terminating the calculation when at least one of the second value and the output values indicates the point at infinity; and completing calculation when both the second value and the output values do not indicate the point at infinity, so as to obtain a result of the cryptographic calculation.
摘要翻译：一种用于基于椭圆曲线上的椭圆点执行加密计算的装置包括：存储器，用于存储包括多个数字的第一值; 以及用于执行处理的处理器，包括：获得表示所述椭圆曲线上的点的第二值; 通过使用预定方程，第一值的每个数字和第二值来计算输出值; 确定所述第二值和所述输出值中的至少一个是否指示无限点; 当所述第二值和所述输出值中的至少一个指示所述无限远点时终止所述计算; 并且当第二值和输出值都不表示无限远点时完成计算，以获得加密计算的结果。

20. 发明授权

US07639808B2 Elliptic curve cryptosystem apparatus, elliptic curve cryptosystem method, elliptic curve cryptosystem program and computer readable recording medium storing the elliptic curve cryptosystem program 有权
标题翻译：椭圆曲线密码系统装置，椭圆曲线密码系统方法，椭圆曲线密码系统程序和存储椭圆曲线密码系统程序的计算机可读记录介质
公开(公告)号：US07639808B2
公开(公告)日：2009-12-29
申请号：US11311590
申请日：2005-12-16
申请人： Tetsuya Izu , Kouichi Itoh , Masahiko Takenaka , Naoya Torii
发明人： Tetsuya Izu , Kouichi Itoh , Masahiko Takenaka , Naoya Torii
IPC分类号： H04K1/00 , H04L9/32
CPC分类号： G06F7/725 , G06F2207/7223 , G06F2207/7228 , H04L9/003 , H04L9/3066 , H04L2209/08
摘要： An elliptic curve cryptosystem apparatus performing an elliptic curve cryptosystem process has a coordinate transforming unit for transforming coordinates (X:Y:Z) on a point P on an elliptic curve over a finite field GF(p^m) to coordinates (r1×(X−s1):r2×(Y−s2):r3×(Z−s3)) (where, p is a prime number, m is an integer not less than 1, r1, r2 and r3 are integers not less than 1 and not larger than (p−1), s1, s2 and s3 are integer not less than 0 and not larger than (p−1), and a code “^” represents power), and a scalar multiplication operating unit for performing scalar multiplication on the point on the elliptic curve transformed by the coordinate transforming unit, wherein at least one of the parameters s1, s2 and s3 has a value other than 0. The apparatus can perform the scalar multiplication in the elliptic curve cryptosystem, with resistance to side channel attacks.
摘要翻译：执行椭圆曲线密码系统处理的椭圆曲线密码系统装置具有坐标变换单元，用于将有限域GF（p ^ m）上的椭圆曲线上的点P上的坐标（X：Y：Z）变换为坐标（r1x（X -s1）：r2x（Y-s2）：r3x（Z-s3））（其中，p是素数，m是不小于1的整数，r1，r2和r3是不小于1且不大于（p-1），s1，s2和s3是不小于0且不大于（p-1）的整数，代码“^”表示功率），以及标量乘法运算单元，用于对指向由坐标变换单元变换的椭圆曲线，其中参数s1，s2和s3中的至少一个具有不为0的值。该装置可以执行椭圆曲线密码系统中的标量乘法，具有抗侧信道攻击。

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