Key distribution system
    71.
    发明申请
    Key distribution system 审中-公开
    关键配电系统

    公开(公告)号:US20090238368A1

    公开(公告)日:2009-09-24

    申请号:US10569961

    申请日:2005-01-31

    IPC分类号: H04L9/08 H04L9/06

    摘要: The cloning source of an authorized receiving device cannot be identified. A key distribution system 1 concerning the present invention includes: a communication channel 10; a key distribution center 11; a server 12; and receiving devices 13a to 13n. The key distribution center 11 distributes, to the server 12, the information necessary for distributing shared keys SK to the receiving devices 13a to 13n, and distributes the individual information group EMMG necessary for receiving the shared keys SK from the server 12. The server 12 generates the shared keys SK, generates the common information ECM based on the shared keys SK and the system secret variable group set SPGS, and distributes the common information ECM to the receiving devices 13a to 13n. The receiving devices 13a to 13n obtain the shared keys SK based on the individual information group EMMG and the common information ECM and outputs them to outside.

    摘要翻译: 授权接收设备的克隆源无法识别。 关于本发明的密钥分发系统1包括:通信信道10; 密钥分配中心11; 服务器12; 以及接收装置13a〜13n。 密钥分配中心11向服务器12分配向接收设备13a至13n分配共享密钥SK所需的信息,并且从服务器12分发用于接收共享密钥SK所必需的个人信息组EMMG。服务器12 生成共享密钥SK,基于共享密钥SK和系统秘密变量组集SPGS生成公共信息ECM,并将公共信息ECM分配给接收装置13a〜13n。 接收设备13a至13n基于个人信息组EMMG和公共信息ECM获得共享密钥SK并将其输出到外部。

    Signature generation apparatus and signature verification apparatus
    72.
    发明申请
    Signature generation apparatus and signature verification apparatus 有权
    签名生成装置和签名验证装置

    公开(公告)号:US20090235078A1

    公开(公告)日:2009-09-17

    申请号:US11578978

    申请日:2006-04-10

    IPC分类号: H04L9/32 H04L9/30 H04L9/14

    CPC分类号: H04L9/3093 H04L9/3255

    摘要: A signature generation apparatus and a signature verification which can surely prevent occurrence of inappropriate signature verification error are providedA signature generation apparatus (110) includes a signature generation unit (114) which calculates a signature vector (s, t) for a message m using a private key, and generates signature data S indicating polynomials sl and sh that can specify the polynomial s and a polynomial th which is a quotient when the polynomial t is divided by q.

    摘要翻译: 一种签名生成装置和可以肯定地防止发生不适当的签名验证错误的签名验证提供了一种签名生成装置(110),包括:签名生成部(114),其使用以下方式计算消息m的签名向量(s,t): 并且生成表示可以指定多项式s的多项式sl和sh的签名数据S,当多项式t除以q时,生成作为商的多项式th。

    Encryption System, Encryption Device, Decryption Device, Program, And Integrated Circuit
    74.
    发明申请
    Encryption System, Encryption Device, Decryption Device, Program, And Integrated Circuit 有权
    加密系统,加密设备,解密设备,程序和集成电路

    公开(公告)号:US20070274518A1

    公开(公告)日:2007-11-29

    申请号:US10592387

    申请日:2005-04-28

    IPC分类号: H04L9/30

    CPC分类号: H04L9/3093 H04L2209/08

    摘要: An encrypted communication system, capable of performing processing with the speed higher than the conventionally achieved speed, has an encryption device and a decryption device which share parameters that satisfy p=3 and q=2ˆk (k: an integer of 2 or greater) (S161), where the decryption device generates a public key and a private key using the parameters (S162-S165), the encryption device encrypts a plain text using the public key (S166-S170), and then, the decryption device decrypts the encrypted text using its own private key (S171-S173).

    摘要翻译: 能够以比常规实现的速度更高的速度进行处理的加密通信系统具有共享满足p = 3且q = 2k(k:2以上的整数)的参数的加密装置和解密装置( S 161),其中解密装置使用参数生成公钥和私钥(S 162 -S 165),加密装置使用公钥加密明文(S 166 -S 170),然后, 解密设备使用其自己的私钥对加密的文本进行解密(S 171 -S 173)。

    Content recording/reproducing system, distribution device, reproducing device, and recording device
    75.
    发明申请
    Content recording/reproducing system, distribution device, reproducing device, and recording device 有权
    内容记录/再现系统,分发设备,再现设备和记录设备

    公开(公告)号:US20070094505A1

    公开(公告)日:2007-04-26

    申请号:US10548265

    申请日:2004-03-11

    IPC分类号: H04L9/00

    摘要: A content recording/reproducing system, which records and reproduces a sub-content relating to a main content, includes a distribution device, first and second recording media, a recording device and a reproducing device. The first recording medium that is non-rewritable prestores key data based on which a public key is derivable, and the main content. The distribution device outputs verification information that includes the sub-content and is generated by applying a digital signature to relative information relating to the sub-content based on a secret key corresponding to the public key. The recording device acquires and records the verification information on the second recording medium that is rewritable. The reproducing device acquires the key data from the first recording medium and the verification information from the second recording medium, derives the public key from the key data, verifies the verification information using the public key, and reproduces the sub-content if the verification succeeds.

    摘要翻译: 记录和再现与主要内容相关的子内容的内容记录/再现系统包括分发装置,第一和第二记录介质,记录装置和再现装置。 不可重写的第一种记录介质预先存储基于该公钥的可导出的密钥数据,以及主要内容。 分发装置输出包含子内容的验证信息,并且通过基于与公开密钥相对应的秘密密钥将数字签名应用于与子内容相关的相关信息来生成。 记录装置在可重写的第二记录介质上获取并记录验证信息。 再现装置从第一记录介质获取密钥数据和来自第二记录介质的验证信息,从密钥数据中导出公共密钥,使用公钥验证验证信息,并且如果验证成功则再现子内容 。

    Elliptic curve converting device, elliptic curve converting method, elliptic curve utilization device and elliptic curve generating device
    76.
    发明授权
    Elliptic curve converting device, elliptic curve converting method, elliptic curve utilization device and elliptic curve generating device 失效
    椭圆曲线转换装置,椭圆曲线转换方法,椭圆曲线利用装置和椭圆曲线生成装置

    公开(公告)号:US07209555B2

    公开(公告)日:2007-04-24

    申请号:US10278914

    申请日:2002-10-24

    IPC分类号: H04K1/00 H04L9/00

    CPC分类号: G06F7/725

    摘要: An elliptic curve converting device that converts a first elliptic curve defined on a finite field F into a second elliptic curve defined on the finite field F comprises: an elliptic curve generating unit 210 that searches an elliptic curve that satisfies a speeding-up condition that reduces calculation quantity of arithmetic on the elliptic curve among a group of isogenous elliptic curves of degree L1 that is a group of elliptic curves that has the same order as and a certain relationship with the first elliptic curve; an elliptic curve condition judgment unit 220 that judges whether the elliptic curve that satisfies the speeding-up condition is searched or not by the elliptic curve generating unit 210; and an elliptic curve output unit 230 that outputs an elliptic curve in the case that the elliptic curve condition judgment unit 220 judges that the elliptic curve that satisfies the speeding-up condition is searched.

    摘要翻译: 将在有限域F上定义的第一椭圆曲线转换成在有限域F上定义的第二椭圆曲线的椭圆曲线转换装置包括:椭圆曲线生成单元210,其搜索满足减小的加速条件的椭圆曲线 作为与第一椭圆曲线具有相同次序的一组椭圆曲线和与第一椭圆曲线有一定关系的一组椭圆曲线的一组等式L 1的一组椭圆曲线的椭圆曲线上的算术计算量; 通过椭圆曲线生成部210判断是否搜索到满足加速条件的椭圆曲线的椭圆曲线条件判定部220; 以及椭圆曲线输出单元230,其在椭圆曲线状态判断单元220判断为搜索满足加速条件的椭圆曲线的情况下输出椭圆曲线。

    Information security device, prime number generation device, and prime number generation method
    77.
    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

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

    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。

    Signature generation apparatus and signature verification apparatus
    80.
    发明授权
    Signature generation apparatus and signature verification apparatus 有权
    签名生成装置和签名验证装置

    公开(公告)号:US07739504B2

    公开(公告)日:2010-06-15

    申请号:US11578432

    申请日:2006-03-14

    IPC分类号: H04L9/30

    摘要: A signature generation apparatus and a signature verification apparatus which can prevent the occurrence of norm zero vector forgery attack. The signature generation apparatus (110) includes a signature generation unit (114) which generates signature data (S) for a message (m) using a private key stored in a private key storage unit (112), and converts the format of the signature data (S) so that the first sub-element of the N sub-elements in the signature data (S) indicates 0 without changing the norm of the signature data (S). The signature verification apparatus (120) includes a signature verification unit (124) which judges whether or not the first sub-element of the N sub-elements included in the signature data (S) indicates 0, and determines the signature data (S) as unauthorized data when judging that it is not 0.

    摘要翻译: 签名生成装置和签名验证装置,其能够防止零向量伪造攻击的发生。 签名生成装置(110)具有使用存储在专用密钥存储部(112)中的专用密钥来生成消息(m)的签名数据(S)的签名生成部(114),并将签名的格式 数据(S),使得签名数据(S)中的N个子元素的第一子元素指示0而不改变签名数据(S)的范围。 签名验证装置(120)包括签名验证单元(124),其判断包括在签名数据(S)中的N个子元素的第一子元素是否指示0,并且确定签名数据(S) 作为未经授权的数据,当判断为不为0时。