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    Information security device, prime number generation device, and prime number generation method
    1.
    发明授权
    Information security device, prime number generation device, and prime number generation method 有权
    信息安全设备，素数生成设备和素数生成方法

    公开(公告)号：US07130422B2

    公开(公告)日：2006-10-31

    申请号：US10120489

    申请日：2002-04-12

    申请人： Yuichi Futa ,  Takatoshi Ono ,  Motoji Ohmori

    发明人： Yuichi Futa ,  Takatoshi Ono ,  Motoji Ohmori

    IPC分类号： H04L9/30 ,  G06F4/58 ,  G06F7/38

    CPC分类号： G06F7/72 ,  G06F2207/7204 ,  H04L9/3033 ,  H04L2209/08 ,  H04L2209/80

    摘要： An information security device receives an input of prime q, and generates prime N that is larger than prime q. In the information security device, a partial information setting unit generates number u such that 2×u×q+1≠0 mod Li (i=1, 2, . . . , n). A random number generating unit generates random number R′. A judgement target generating unit generates R=u+L1×L2× . . . ×Ln×R′ and N=2×R×q+1, using number u and random number R′. A primality judging unit judges the primality of number N, using numbers N and R generated by the judgement target generating unit.

    摘要翻译： 信息安全设备接收素数q的输入，并产生大于素数q的素数N. 在信息安全装置中，部分信息设定单元生成数字u，使得2xuxq + 1 <> 0 mod L i（i = 1,2，...，n）。 随机数生成单元生成随机数R'。 判断目标产生单元生成R = u + L 1 xL 2 x x。 。 。 xL xR'和N = 2xRxq + 1，使用数u和随机数R'。 原语判断单元使用由判断目标生成单元生成的数字N和R来判断数字N的原语。

    Content distribution system
    3.
    发明授权
    Content distribution system 有权
    内容分发系统

    公开(公告)号：US08601590B2

    公开(公告)日：2013-12-03

    申请号：US11790609

    申请日：2007-04-26

    申请人： Toshihisa Nakano ,  Masao Nonaka ,  Yuichi Futa ,  Motoji Ohmori ,  Ryo Nojima ,  Kazukuni Kobara ,  Hideki Imai

    发明人： Toshihisa Nakano ,  Masao Nonaka ,  Yuichi Futa ,  Motoji Ohmori ,  Ryo Nojima ,  Kazukuni Kobara ,  Hideki Imai

    IPC分类号： G06F21/00 ,  G06F21/16 ,  G06F21/10

    CPC分类号： G06F21/16 ,  G06F21/10 ,  H04L9/14 ,  H04L9/3247 ,  H04L9/3263 ,  H04L2209/608

    摘要： A content distribution system for transferring contents between transmission device and reception device. The transmission device includes: key obtaining unit that obtains, from reception device, public keys and public key identifiers; watermark embedding unit that embeds a different public key identifier, as electronic watermark, into each of contents that are identical in substance; an encryption unit that encrypts contents using public keys to generate encrypted contents; and transmission unit that transmits encrypted contents to reception device. The reception device includes: key storage unit storing public keys, public key identifiers, and a private key that makes a pair with one of the public keys; key transmission unit that transmits public keys and public key identifiers to the transmission device; content receiving unit that receives encrypted contents from transmission device; and decryption unit that obtains a content from the received encrypted contents, using the private key.

    摘要翻译： 一种用于在传输设备和接收设备之间传送内容的内容分发系统。 传输设备包括：密钥获取单元，从接收设备获取公钥和公开密钥标识符; 水印嵌入单元将不同的公钥标识符作为电子水印嵌入到实质上相同的每个内容中; 加密单元，其使用公共密钥对内容进行加密以生成加密内容; 以及将加密内容发送到接收装置的发送单元。 接收装置包括：存储公共密钥的密钥存储单元，公开密钥标识符和与公钥之一成对的专用密钥; 密钥发送单元，向发送装置发送公开密钥和公开密钥标识符; 从发送装置接收加密内容的内容接收单元; 以及使用私钥从所接收的加密内容中获取内容的解密单元。

    Password recovery system
    5.
    发明授权
    Password recovery system 有权
    密码恢复系统

    公开(公告)号：US08024577B2

    公开(公告)日：2011-09-20

    申请号：US10684400

    申请日：2003-10-15

    申请人： Motoji Ohmori ,  Natsume Matsuzaki ,  Yuichi Futa

    发明人： Motoji Ohmori ,  Natsume Matsuzaki ,  Yuichi Futa

    IPC分类号： G06F21/00 ,  G06F7/04 ,  G06F15/16 ,  G06F17/30 ,  G06F12/00

    CPC分类号： H04L63/083 ,  G06F21/31 ,  G06F21/43 ,  G06F2221/2131 ,  H04L29/12009 ,  H04L29/12018 ,  H04L29/12801 ,  H04L61/10 ,  H04L61/6004 ,  H04L63/0428

    摘要： The present invention provides a password recovery system that re-supplies a password to only the legitimate user of the password. The password recovery system includes a memory card with CPU and a mobile phone. When a password needs to be recovered, a phone call is made, to the mobile phone, from a telephone connected to a phone line whose phone number is registered in advance into the memory card with CPU. The mobile phone then obtains the telephone number of the phone line via a caller's telephone number notifying service. It is judged whether the obtained telephone number and the registered phone number are the same, and when they are the same, the password stored in the memory card with CPU will be re-supplied so that the user can recover it.

    摘要翻译： 本发明提供了一种密码恢复系统，其仅向密码的合法用户提供密码。 密码恢复系统包括带有CPU和手机的存储卡。 当需要恢复密码时，从连接到电话号码已被注册到电话号码的电话机与手机进行电话通话。 然后，移动电话经由呼叫者的电话号码通知服务获得电话线路的电话号码。 判断所获得的电话号码和注册的电话号码是否相同，并且当它们相同时，存储在具有CPU的存储卡中的密码将被重新提供，以便用户可以恢复。

    Program conversion device, and secret keeping program
    8.
    发明申请
    Program conversion device, and secret keeping program 审中-公开
    程序转换装置，秘密保存程序

    公开(公告)号：US20090217008A1

    公开(公告)日：2009-08-27

    申请号：US11918785

    申请日：2006-04-21

    申请人： Taichi Sato ,  Motoji Ohmori ,  Rieko Asai ,  Yuichi Futa ,  Tomoyuki Haga ,  Masahiro Mambo

    发明人： Taichi Sato ,  Motoji Ohmori ,  Rieko Asai ,  Yuichi Futa ,  Tomoyuki Haga ,  Masahiro Mambo

    IPC分类号： G06F9/302 ,  G06F9/30

    CPC分类号： G06F21/54 ,  G06F21/125 ,  G06F21/14

    摘要： Provided is a program conversion apparatus for generating a secret holding program, which disables a malicious analyzer from analyzing the an original program easily.The program conversion apparatus generates a first instruction group for acquiring values to assign to selection parameters; a second instruction group that includes an instruction group for acquiring, based on an arithmetic expression that uses the selection parameters, a selection identifier showing a selection-target data piece to be processed next; a third instruction group for updates a value of each selection parameter so as to reflect one of (a) a selection identifier showing one of the selection-target data pieces that has already been processed, and (b) at least one of one or more values that have already been assigned to the selection parameters; and selection-target data pieces that, by processing in a predetermined order, output an execution result identical to a result of the original program, each of the selection-target data pieces being in correspondence with a different selection identifier. The program conversion apparatus generates the secret holding program so as to include the first instruction group, the second instruction group, the third instruction group and the selection-target data pieces.

    摘要翻译： 提供了一种用于生成秘密保持程序的程序转换装置，其禁止恶意分析器容易地分析原始程序。 程序转换装置生成用于获取分配给选择参数的值的第一指令组; 第二指令组，其包括用于基于使用所述选择参数的算术表达式获取示出接下来要处理的选择目标数据块的选择标识符的指令组; 第三指令组，用于更新每个选择参数的值，以便反映（a）表示已经被处理的选择目标数据段之一的选择标识符之一，以及（b）一个或多个 已经分配给选择参数的值; 以及选择目标数据，通过按预定顺序处理，输出与原始程序的结果相同的执行结果，每个选择对象数据段与不同的选择标识符相对应。 程序转换装置生成秘密保持程序，以包括第一指令组，第二指令组，第三指令组和选择目标数据。

    SIGNATURE GENERATING DEVICE, SIGNATURE GENERATING METHOD AND SIGNATURE GENERATING PROGRAM
    9.
    发明申请
    SIGNATURE GENERATING DEVICE, SIGNATURE GENERATING METHOD AND SIGNATURE GENERATING PROGRAM 有权
    签名生成设备，签名生成方法和签名生成程序

    公开(公告)号：US20090094464A1

    公开(公告)日：2009-04-09

    申请号：US12158033

    申请日：2006-12-26

    申请人： Yuichi Futa ,  Motoji Ohmori ,  Masahiro Mambo

    发明人： Yuichi Futa ,  Motoji Ohmori ,  Masahiro Mambo

    IPC分类号： H04L9/06 ,  H04L9/28

    CPC分类号： H04L9/002 ,  H04L9/3013 ,  H04L9/3073 ,  H04L9/3252 ,  H04L2209/08 ,  H04L2209/127 ,  H04L2209/16

    摘要： A signature generation apparatus is capable of making a value used in signature generation processing difficult to analyze. In the signature generation apparatus, a random number generation module generates a len-bit random number u, a selection module converts the generated random number u into a bit expression, and acquires element pairs corresponding to the bit values from a table memory unit. A random element generation module applies a basic operation of a first group G and a second group to all acquired element pairs, and calculates an element Pk on the first group G and an element Pak on the second group Ga. The signature generation apparatus generates a digital signature S for a message m with use of a transformation module, a main operation module, an inverse transformation module, a multiplication module, a division module, and a signature data generation module.

    摘要翻译： 签名生成装置能够使签名生成处理中使用的值难以分析。 在签名生成装置中，随机数生成模块生成len位随机数u，选择模块将生成的随机数u转换为比特表达式，并从表存储单元获取与比特值对应的元素对。 随机元素生成模块将第一组G和第二组的基本操作应用于所有获取的元素对，并且计算第一组G上的元素Pk和第二组Ga上的元素Pak，签名生成装置生成 使用变换模块的消息m的数字签名S，主操作模块，逆变换模块，乘法模块，分割模块和签名数据生成模块。

    Signature Generation Device and Signature Verification Device
    10.
    发明申请
    Signature Generation Device and Signature Verification Device 有权
    签名生成装置和签名验证装置

    公开(公告)号：US20080222418A1

    公开(公告)日：2008-09-11

    申请号：US11795871

    申请日：2006-01-17

    申请人： Yuichi Futa ,  Shingo Hasegawa ,  Shuji Isobe ,  Motoji Ohmori ,  Hiroki Shizuya

    发明人： Yuichi Futa ,  Shingo Hasegawa ,  Shuji Isobe ,  Motoji Ohmori ,  Hiroki Shizuya

    IPC分类号： H04L9/32 ,  H04L9/16 ,  H04L9/30 ,  H04L9/08

    CPC分类号： H04L9/3247 ,  G06F9/30007 ,  H04L9/3263

    摘要： A signature generation apparatus capable of preventing transcript attack on signature data is provided. The signature generation apparatus performing a digital signature operation with the use of a signature key: stores the signature key; performs the digital signature operation on signature target data with the use of the signature key to generate signature data; counts the cumulative count of digital signature operations having been performed by the signature generation unit with the use of the signature key; judges whether the cumulative count has reached a predetermined count; and inhibits the use of the signature key in the digital signature operation from then onward in a case where the judgment unit determines that the cumulative count has reached the predetermined count.

    摘要翻译： 提供了能够防止对签名数据进行转录攻击的签名生成装置。 签名生成装置使用签名密钥执行数字签名操作;存储签名密钥; 使用签名密钥对签名目标数据执行数字签名操作，生成签名数据; 使用签名密钥对由签名生成单元执行的数字签名操作的累积计数进行计数; 判断累积计数是否达到预定计数; 并且在判断单元确定累积计数已达到预定计数的情况下，禁止在数字签名操作中使用签名密钥。