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51. 发明申请

US20070064944A1 Method and apparatus for symmetric-key decryption 有权
标题翻译：用于对称密钥解密的方法和装置
公开(公告)号：US20070064944A1
公开(公告)日：2007-03-22
申请号：US11602263
申请日：2006-11-21
申请人： Soichi Furuya , Kazuo Takaragi , Hiroyuki Kurumatani , Masashi Takahashi , Kunihiko Miyazaki , Hisayoshi Sato , Dai Watanabe
发明人： Soichi Furuya , Kazuo Takaragi , Hiroyuki Kurumatani , Masashi Takahashi , Kunihiko Miyazaki , Hisayoshi Sato , Dai Watanabe
IPC分类号： H04L9/00
CPC分类号： H04L9/0822 , H04L9/0625 , H04L9/0637 , H04L9/0662 , H04L9/3236 , H04L2209/125 , H04L2209/20 , H04L2209/38
摘要： A symmetric-key cryptographic technique capable of realizing both high-speed cryptographic processing having a high degree of parallelism, and alteration detection. The invention includes dividing plaintext composed of redundancy data and a message to generate plaintext blocks each having a predetermined length; generating a random number sequence based on a secret key, generating a random number block corresponding to one of the plaintext blocks from the random number sequence, outputting a feedback value obtained as a result of operation on the one plaintext block and the random number block, the feedback value being fed back for using the operation on another plaintext block, and performing an encryption operation using the one plaintext block, random number block, and feedback value.
摘要翻译：一种对称密钥加密技术，能够实现具有高度并行性和改变检测的高速密码处理。本发明包括划分由冗余数据组成的明文和消息，以产生每个具有预定长度的明文块; 基于秘密密钥生成随机数序列，从随机数序列生成与一个明文块相对应的随机数块，将作为操作结果获得的反馈值输出到一个明文块和随机数块上，对反馈值进行反馈以对另一明文块进行操作，并使用一个明文块，随机数块和反馈值进行加密操作。

52. 发明授权

US07134021B2 Method and system for recovering the validity of cryptographically signed digital data 有权
公开(公告)号：US07134021B2
公开(公告)日：2006-11-07
申请号：US09816777
申请日：2001-03-22
申请人： Kunihiko Miyazaki , Hiroshi Yoshiura , Seiichi Susaki , Ryoichi Sasaki , Kazuo Takaragi , Hisashi Toyoshima , Takeshi Matsuki
发明人： Kunihiko Miyazaki , Hiroshi Yoshiura , Seiichi Susaki , Ryoichi Sasaki , Kazuo Takaragi , Hisashi Toyoshima , Takeshi Matsuki
IPC分类号： G06F17/00
CPC分类号： G06F21/645 , G06F21/64 , G06F2221/2101 , G06Q20/3825 , H04L9/3252 , H04L63/0428 , H04L63/12 , H04L2209/38 , H04L2209/56 , H04L2209/60
摘要： According to the present invention, techniques, including a method and system, for restoring and/or validating data and/or associated signature log entries are provided. One embodiment of the present invention provides a method for validating a restored message, having an entry generated in a signature log for a message, where the entry includes cryptographic information associated with the message; Next, when said message is lost, the restored message is generated responsive to a request; and the restored message is validated using the signature log. In another embodiment a method for validating a selected log entry by using a signature log having a plurality of recorded log entries is provided. The method includes: computing a cryptographic value for the selected log entry; and determining if the cryptographic value is part of another recorded log entry.

53. 发明申请

US20050135661A1 Unique code generating apparatus, method, program and recording medium 失效
标题翻译：唯一代码生成装置，方法，程序和记录介质
公开(公告)号：US20050135661A1
公开(公告)日：2005-06-23
申请号：US10964683
申请日：2004-10-15
申请人： Masahiro Mimura , Kenta Takahashi , Kazuo Takaragi , Masakatsu Nishigaki , Yoichi Shibata
发明人： Masahiro Mimura , Kenta Takahashi , Kazuo Takaragi , Masakatsu Nishigaki , Yoichi Shibata
IPC分类号： G06T7/00 , G06F15/00 , G06F21/20 , G06K9/00 , G07C9/00 , H04L9/32
CPC分类号： G06K9/00067 , G07C9/00158
摘要： A unique code generating apparatus for generating, according to biometric information representing a physical or behavioral feature of a user, a unique code as a unique value for the biometric information includes a statistic information generating section for conducting statistical analysis for a feature of biometric information for registration and generating statistic information, a statistic information table generating section for summarizing the statistic information for each biometric information, setting a unique code for each statistic information, and generating a statistic information table unique to the biometric information, a unique code extracting section for applying to the statistic information table the statistic information generated by the statistic information generating section according to biometric information for collation and extracting an associated unique code from the table, and an output processing section for outputting the unique code extracted by the unique code extracting section to an output interface.
摘要翻译：一种独特的代码生成装置，用于根据表示用户的物理或行为特征的生物信息生成作为生物特征信息的唯一值的唯一代码，包括：统计信息生成部，用于对生物体信息的特征进行统计分析，注册和生成统计信息，统计信息表生成部分，用于总结每个生物特征信息的统计信息，为每个统计信息设置唯一代码，以及生成对生物特征信息唯一的统计信息表;唯一代码提取部分，向统计信息表提供由统计信息生成部根据用于对照的生物体信息生成的统计信息，并从表中提取相关联的唯一码，以及输出处理部，用于输出由un提取的唯一码 ique代码提取部分到输出接口。

54. 发明授权

US06714648B2 IC card equipped with elliptic curve encryption processing facility 失效
标题翻译： IC卡配有椭圆曲线加密处理设备
公开(公告)号：US06714648B2
公开(公告)日：2004-03-30
申请号：US10252669
申请日：2002-09-24
申请人： Seiji Miyazaki , Kazuo Takaragi
发明人： Seiji Miyazaki , Kazuo Takaragi
IPC分类号： H04L928
CPC分类号： G06F7/725 , G06F7/728
摘要： In an IC card incorporating residual multiplier hardware for implementing a high-speed algorithm for a residual multiplication arithmetic, a method and a device capable of executing a public key encryption processing such as an elliptic curve encryption processing at a high speed. Residual arithmetic succeeding to generation of a random number and residual arithmetic in a signature generating processing can be executed by using a residual multiplier. Further, in order to use effectively the residual multiplier for arithmetic operation on an elliptic curve, the point on the elliptic curve is transformed from a two-dimensional affine coordinate system to a three-dimensional coordinate system. Additionally, multiplicative inverse arithmetic for realizing reverse transformation from the three-dimensional coordinate system to the two-dimensional affine coordinate system as well as for determining a signature s can be executed only with the residual multiplication arithmetic. By making use of the residual multiplier in this manner, the processing speed can be increased. Computation complexity can be reduced by storing previously those parameters which are used frequently and constant multiplies of a base point of the elliptic curve in the form of tables, which also contributes to increasing of processing speed.
摘要翻译：在包含用于实现用于残余乘法运算的高速算法的残余乘法器硬件的IC卡中，能够以高速执行诸如椭圆曲线加密处理的公钥加密处理的方法和装置。可以通过使用剩余乘数来执行在签名生成处理中继续生成随机数和残差算术的剩余算术。此外，为了有效地使用用于椭圆曲线上的算术运算的剩余乘数，将椭圆曲线上的点从二维仿射坐标系变换为三维坐标系。另外，用于实现从三维坐标系到二维仿射坐标系的反向变换以及用于确定签名s的乘法逆运算只能用剩余乘法运算来执行。通过以这种方式利用剩余乘数，可以提高处理速度。可以通过先前存储经常使用的那些参数和椭圆曲线的基点的恒定倍数以表的形式来减少计算复杂度，这也有助于提高处理速度。

55. 发明授权

US06606385B1 Data encrypting/decrypting conversion methods and apparatuses and data communication system adopting the same 有权
标题翻译：数据加密/解密转换方法和装置以及数据通信系统采用
公开(公告)号：US06606385B1
公开(公告)日：2003-08-12
申请号：US09130529
申请日：1998-08-04
申请人： Makoto Aikawa , Kazuo Takaragi , Hiroyuki Koreeda , Manabu Sasamoto , Hiroo Okamoto , Takaharu Noguchi , Soichi Furuya , Shigeru Hirahata
发明人： Makoto Aikawa , Kazuo Takaragi , Hiroyuki Koreeda , Manabu Sasamoto , Hiroo Okamoto , Takaharu Noguchi , Soichi Furuya , Shigeru Hirahata
IPC分类号： H04K100
CPC分类号： H04L9/0625 , G10H2230/015 , H04L2209/08 , H04L2209/12 , H04L2209/601
摘要： Encrypting/decrypting conversion method and apparatus capable of controlling dynamically cyclic shift independent of data to undergo encrypting/decrypting conversion includes two or more different fixed circulating shift processing means for shifting cyclically the data by a fixed bit number leftward or rightward, a cyclic shift processing selecting means for selecting fixed cyclic shift processing means. The selecting sequence determined by the cyclic shift processing means is determined on the basis of data for determining the shift number selecting sequence.
摘要翻译：能够独立于数据进行加密/解密转换的动态循环移位的加密/解密转换方法和装置包括两个或多个不同的固定循环移位处理装置，用于将数据循环移位固定位数向左或向右循环移位处理选择装置，用于选择固定循环移位处理装置。由循环移位处理装置确定的选择序列是基于用于确定移动号码选择序列的数据来确定的。

56. 发明授权

US06504931B1 Method and apparatus for encrypting data 有权
标题翻译：用于加密数据的方法和装置
公开(公告)号：US06504931B1
公开(公告)日：2003-01-07
申请号：US09708564
申请日：2000-11-09
申请人： Hiroshi Yoshiura , Kazuo Takaragi , Mayuko Shimizu
发明人： Hiroshi Yoshiura , Kazuo Takaragi , Mayuko Shimizu
IPC分类号： H04L900
CPC分类号： H04L9/0631 , H04L9/0656 , H04L9/0891 , H04L2209/30
摘要： In the process of compressing and encrypting data, without an increase of processing time, a cipher capability is secured against the latest cryptanalysis such as differential and linear cryptanalyses. The differential and linear cryptanalyses are executed to collect plural pairs of plaintext and cryptosystem for the same key and perform the statistical operation for estimating the key. An input/output (I/O) process is executed to receive plaintext data and generate a different key for each data on the random number and set the key to a work key. The encrypted intermediate result or the pre-encrypted result is fed back to permit frequent changing of the work key. The changing operation is executed to change correspondence between the plaintext data and the compressed data in the compressing process.
摘要翻译：在压缩和加密数据的过程中，在不增加处理时间的情况下，针对最新的密码分析（如差分和线性密码分析）来确保密码能力。执行差分和线性密码分析以收集相同密钥的多对明文和密码对，并执行用于估计密钥的统计操作。执行输入/输出（I / O）处理以接收明文数据并为随机数上的每个数据生成不同的密钥，并将密钥设置为工作密钥。加密的中间结果或预加密的结果被反馈以允许频繁地改变工作密钥。执行改变操作以在压缩处理中改变明文数据和压缩数据之间的对应关系。

57. 发明授权

US06341349B1 Digital signature generating/verifying method and system using public key encryption 失效
标题翻译：数字签名生成/验证方法和使用公钥加密的系统
公开(公告)号：US06341349B1
公开(公告)日：2002-01-22
申请号：US08961557
申请日：1997-10-30
申请人： Kazuo Takaragi , Hiroyuki Kurumatani
发明人： Kazuo Takaragi , Hiroyuki Kurumatani
IPC分类号： G06F124
CPC分类号： H04L9/3066 , G06F7/725 , H04L9/3013 , H04L9/3247
摘要： A digital signature generating/verifying method using a public key encryption scheme which ensures high security, reduction in length of the digital signature and independency of the length of the digital signature on that the order of a base point. In generating a digital signature, a first hash value (e) satisfying a condition that e=H(M) is determined for a given message (M) by using a hash function (H), a numerical value (x) is obtained from translation of a random number, a hash value (r) satisfying a condition that r=h(x) is determined by using a hash function (h) whose output value is shorter than that of the first hash function (H), and the digital signature is generated by using the hash values (e) and (r) as determined. For verification of an inputted digital signature, the hash value (e) satisfying the condition that e=H(M) is determined, and for a numerical value (x) obtained from arithmetic operation of a public key (Q), a base point (P) and the inputted digital signature (r, s), a hash value (r′) satisfying a condition that r′=h(x) on the basis of the hash value (re), the digital signature (r, s), the base point (P) and the public key (Q) by using a hash function (h) whose output value is shorter than that of the first hash function (H). The hash value (r′) is then compared with a tally (r) of the inputted digital signature to thereby verify the inputted digital signature.
摘要翻译：使用公钥加密方案的数字签名生成/验证方法，其基于点的顺序确保高安全性，数字签名的长度减少和数字签名的长度的独立性。在产生数字签名时，通过使用散列函数（H）为给定消息（M）确定满足条件e = H（M）的第一散列值（e），从（翻译随机数，通过使用其输出值比第一散列函数（H）的输出值短的散列函数（h）来确定满足r = h（x）的条件的散列值（r），并且通过使用如所确定的哈希值（e）和（r）来生成数字签名。为了验证输入的数字签名，确定满足e = H（M）的条件的散列值（e），对于从公共密钥（Q）的算术运算获得的数值（x），基准点（p）和输入的数字签名（r，s），基于散列值（re）满足条件r'= h（x）的散列值（r'），数字签名（r，s）），基点（P）和公钥（Q），通过使用输出值比第一散列函数（H）的输出值短的散列函数（h）。然后将哈希值（r'）与输入的数字签名的计数（r）进行比较，从而验证输入的数字签名。

58. 发明授权

US6141421A Method and apparatus for generating hash value 失效
标题翻译：用于生成哈希值的方法和装置
公开(公告)号：US6141421A
公开(公告)日：2000-10-31
申请号：US986390
申请日：1997-12-08
申请人： Kazuo Takaragi , Hiroyuki Kurumatani
发明人： Kazuo Takaragi , Hiroyuki Kurumatani
IPC分类号： G09C1/00 , H04L9/32 , H04L9/30 , H04L9/20
CPC分类号： H04L9/0643 , H04L2209/043 , H04L2209/12 , H04L2209/20 , H04L2209/30
摘要： A method and apparatus for generating a highly secured hash value without deteriorating the processing speed is provided. A hash function such that when a message M is given, the message M is compressed so as to have a certain kind of characteristics of cipher is realized. In a step, (1) one to one expanding process so that divided data of the message is inputted and longer data is outputted is executed, and (2) a plurality of cyclic shifting processes in which the number of shifting is different are executed. Consequently, the hash function can be calculated at higher speed than a conventional method of simple repetitive compression of divided data of a message.
摘要翻译：提供一种用于在不恶化处理速度的情况下产生高度安全的散列值的方法和装置。一种散列函数，使得当给定消息M时，消息M被压缩以便实现具有一定种类的密码特性。在一个步骤中，（1）进行一对一的扩展处理，以便输入消息的分割数据并输出较长的数据，并且（2）执行移位数不同的多个循环移位处理。因此，可以以比消息的分割数据的简单重复压缩的常规方法更高的速度来计算散列函数。

59. 发明授权

US6131162A Digital data authentication method 失效
公开(公告)号：US6131162A
公开(公告)日：2000-10-10
申请号：US90419
申请日：1998-06-04
申请人： Hiroshi Yoshiura , Kazuo Takaragi , Ryoichi Sasaki , Seiichi Susaki , Hisashi Toyoshima , Tsukasa Saito
发明人： Hiroshi Yoshiura , Kazuo Takaragi , Ryoichi Sasaki , Seiichi Susaki , Hisashi Toyoshima , Tsukasa Saito
IPC分类号： G06F21/10 , G06T1/00 , H04L29/06 , H04N1/32 , H04L9/32 , H04L9/28 , H04L9/30
CPC分类号： H04L63/12 , G06F21/10 , G06T1/0021 , G06T1/005 , H04L63/0442 , H04L63/08 , H04L63/126 , H04L9/3236 , H04L9/3247 , H04N1/32144 , H04N21/2541 , H04N21/42684 , H04N21/44 , H04N21/4622 , H04N21/4627 , H04N21/63345 , H04N21/835 , H04N7/163 , G06T2201/0063 , G06T2201/0081 , H04L2209/56 , H04L2209/60 , H04L2463/103 , H04N2201/323 , H04N2201/3236
摘要： This invention provides a method for identifying a purchaser who purchased content from which an illegal copy was produced. A provider system encrypts a content purchased by the purchaser using a public key of a purchaser system and sends the encrypted content to the purchaser system. The purchaser system creates a digital signature of the content with the use of a private key of its own and embeds the created digital signature into the received content. When an illegal copy is found, the provider system verifies the digital signature, embedded in the illegal copy as a digital watermark, to identify the purchaser who purchased the content from which the illegal copy was produced.

60. 发明授权

US6122378A Data compression/encryption method and system 失效
标题翻译：数据压缩/加密方法和系统
公开(公告)号：US6122378A
公开(公告)日：2000-09-19
申请号：US29547
申请日：1998-03-05
申请人： Hiroshi Yoshiura , Kazuo Takaragi , Yusuke Hino , Yutaka Otsu
发明人： Hiroshi Yoshiura , Kazuo Takaragi , Yusuke Hino , Yutaka Otsu
IPC分类号： G11B20/00 , H03M7/40 , H04N1/44
CPC分类号： G11B20/0021 , G11B20/00007 , G11B20/00086 , H03M7/40
摘要： An information processing system including a data input means (203, 208, 217, 219) for inputting or receiving data, a data compressing means (206) for compressing the data, a decompressing means (221) for decompressing the compressed data and a main storage (209, 222) is provided with an encrypting means (207) for encrypting the data and a decrypting means (220) for decrypting the encrypted data. In execution of a compression/encryption step in which the compressing means (206) and the encrypting means (207) perform compression and encryption for a part of the data and a decryption/decompression step in which the decompressing means (221) and the decrypting means (220) perform decompression and decryption for a part of the compressed and encrypted data, amounts of series of data processed in the compression/encryption and decryption/decompression steps are so set that a memory capacity required for executing the processings does not exceed capacity of the main storage, wherein the compression/encryption and decryption/decompression steps are repeated more than once inclusive.
摘要翻译： PCT No.PCT / JP95 / 01815 Sec。 371日期：1998年3月5日 102（e）1998年3月5日PCT PCT 1995年9月13日PCT公布。公开号WO97 / 10659 日期1997年3月20日包括用于输入或接收数据的数据输入装置（203,208,217,219）的信息处理系统，用于压缩数据的数据压缩装置（206），用于解压缩数据的解压缩装置压缩数据和主存储器（209,222）设置有用于加密数据的加密装置（207）和用于解密加密数据的解密装置（220）。在执行压缩/加密步骤，其中压缩装置（206）和加密装置（207）对一部分数据执行压缩和加密，以及解密/解压缩步骤，其中解压缩装置（221）和解密装置（220）对压缩和加密数据的一部分执行解压缩和解密，在压缩/加密和解密/解压缩步骤中处理的一系列数据的数量被设置为使得执行处理所需的存储器容量不超过容量的主存储器，其中压缩/加密和解密/解压缩步骤不止一次地重复。

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