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1. 发明授权

US08995660B2 Cryptographic system, cryptographic communication method, encryption apparatus, key generation apparatus, decryption apparatus, content server, program, and storage medium 有权
标题翻译：密码系统，密码通信方式，加密装置，密钥生成装置，解密装置，内容服务器，程序和存储介质
公开(公告)号：US08995660B2
公开(公告)日：2015-03-31
申请号：US13810797
申请日：2011-07-22
申请人： Tetsutaro Kobayashi , Kaku Takeuchi , Sakae Chikara
发明人： Tetsutaro Kobayashi , Kaku Takeuchi , Sakae Chikara
IPC分类号： H04L9/00 , H04L9/14 , H04L9/08 , H04L9/30
CPC分类号： H04L9/14 , H04L9/0836 , H04L9/0847 , H04L9/085 , H04L9/0861 , H04L9/3073
摘要： A cryptographic communication technology that is based on functional encryption and that can operate flexibly is provided. A conversion rule information pair is determined in advance, which has attribute conversion rule information prescribing a conversion rule for converting attribute designation information to attribute information used in a functional encryption algorithm and logical expression conversion rule information prescribing a conversion rule for converting logical expression designation information to logic information used in the functional encryption algorithm. One kind of conversion rule information included in the conversion rule information pair is used to obtain first attribute information or first logic information from input information. The first attribute information or the first logic information is used for encryption. Encryption information is decrypted with a decryption key generated by using second attribute information or second logic information obtained from user information by using the other kind of conversion rule information.
摘要翻译：提供了基于功能加密并且可以灵活操作的加密通信技术。确定转换规则信息对，其具有规定用于将属性指定信息转换为功能加密算法中使用的属性信息的转换规则的属性转换规则信息，以及规定用于转换逻辑表达式指定信息的转换规则的逻辑表达式转换规则信息到功能加密算法中使用的逻辑信息。包括在转换规则信息对中的一种转换规则信息用于从输入信息获得第一属性信息或第一逻辑信息。第一属性信息或第一逻辑信息用于加密。使用通过使用另一种转换规则信息通过使用从用户信息获得的第二属性信息或第二逻辑信息生成的解密密钥对加密信息进行解密。

2. 发明授权

US08964982B2 Cryptographic system, cryptographic communication method, encryption apparatus, key generation apparatus, decryption apparatus, content server, program, and storage medium 有权
标题翻译：密码系统，密码通信方式，加密装置，密钥生成装置，解密装置，内容服务器，程序和存储介质
公开(公告)号：US08964982B2
公开(公告)日：2015-02-24
申请号：US13258187
申请日：2010-04-23
申请人： Kaku Takeuchi , Tetsutaro Kobayashi , Sakae Chikara
发明人： Kaku Takeuchi , Tetsutaro Kobayashi , Sakae Chikara
IPC分类号： H04K1/00 , H04L9/00 , H04L9/30 , H04L9/08 , H04L9/32
CPC分类号： H04L9/3073 , H04L9/0861 , H04L9/3093 , H04L9/3263
摘要： A cryptographic communication technology that is based on predicate encryption and that can operate flexibly is provided. A conversion rule information pair is determined in advance, which has attribute conversion rule information prescribing a conversion rule for converting attribute designation information to attribute information used in a predicate encryption algorithm and predicate conversion rule information prescribing a conversion rule for converting predicate designation information to predicate information used in the predicate encryption algorithm. One kind of conversion rule information included in the conversion rule information pair is used to obtain first attribute information or first predicate information from input information. The first attribute information or the first predicate information is used for encryption. Encryption information is decrypted with a decryption key generated by using second attribute information or second predicate information obtained from user information by using the other kind of conversion rule information.
摘要翻译：提供了基于谓词加密并且可以灵活操作的加密通信技术。确定转换规则信息对，其具有规定用于将属性指定信息转换为在谓词加密算法中使用的属性信息的转换规则的属性转换规则信息，以及规定用于将谓词指定信息转换为谓词的转换规则的谓词转换规则信息谓词加密算法中使用的信息。包括在转换规则信息对中的一种转换规则信息用于从输入信息获得第一属性信息或第一谓词信息。第一属性信息或第一谓词信息用于加密。使用通过使用另一种转换规则信息通过使用从用户信息获得的第二属性信息或第二谓词信息生成的解密密钥对加密信息进行解密。

3. 发明申请

US20130114810A1 CRYPTOGRAPHIC SYSTEM, CRYPTOGRAPHIC COMMUNICATION METHOD, ENCRYPTION APPARATUS, KEY GENERATION APPARATUS, DECRYPTION APPARATUS, CONTENT SERVER, PROGRAM, AND STORAGE MEDIUM 有权
标题翻译： CRYPTOGRAPHIC系统，CRYPTOGRAPHIC通信方法，加密设备，主要生成设备，分解设备，内容服务器，程序和存储介质
公开(公告)号：US20130114810A1
公开(公告)日：2013-05-09
申请号：US13810797
申请日：2011-07-22
申请人： Tetsutaro Kobayashi , Kaku Takeuchi , Sakae Chikara
发明人： Tetsutaro Kobayashi , Kaku Takeuchi , Sakae Chikara
IPC分类号： H04L9/14
CPC分类号： H04L9/14 , H04L9/0836 , H04L9/0847 , H04L9/085 , H04L9/0861 , H04L9/3073
摘要： A cryptographic communication technology that is based on functional encryption and that can operate flexibly is provided. A conversion rule information pair is determined in advance, which has attribute conversion rule information prescribing a conversion rule for converting attribute designation information to attribute information used in a functional encryption algorithm and logical expression conversion rule information prescribing a conversion rule for converting logical expression designation information to logic information used in the functional encryption algorithm. One kind of conversion rule information included in the conversion rule information pair is used to obtain first attribute information or first logic information from input information. The first attribute information or the first logic information is used for encryption. Encryption information is decrypted with a decryption key generated by using second attribute information or second logic information obtained from user information by using the other kind of conversion rule information.
摘要翻译：提供了基于功能加密并且可以灵活操作的加密通信技术。确定转换规则信息对，其具有规定用于将属性指定信息转换为功能加密算法中使用的属性信息的转换规则的属性转换规则信息，以及规定用于转换逻辑表达式指定信息的转换规则的逻辑表达式转换规则信息到功能加密算法中使用的逻辑信息。包括在转换规则信息对中的一种转换规则信息用于从输入信息获得第一属性信息或第一逻辑信息。第一属性信息或第一逻辑信息用于加密。使用通过使用另一种转换规则信息通过使用从用户信息获得的第二属性信息或第二逻辑信息生成的解密密钥对加密信息进行解密。

4. 发明申请

US20120027210A1 CRYPTOGRAPHIC SYSTEM, CRYPTOGRAPHIC COMMUNICATION METHOD, ENCRYPTION APPARATUS, KEY GENERATION APPARATUS, DECRYPTION APPARATUS, CONTENT SERVER, PROGRAM, AND STORAGE MEDIUM 有权
标题翻译： CRYPTOGRAPHIC系统，CRYPTOGRAPHIC通信方法，加密设备，主要生成设备，分解设备，内容服务器，程序和存储介质
公开(公告)号：US20120027210A1
公开(公告)日：2012-02-02
申请号：US13258187
申请日：2010-04-23
申请人： Kaku Takeuchi , Tetsutaro Kobayashi , Sakae Chikara
发明人： Kaku Takeuchi , Tetsutaro Kobayashi , Sakae Chikara
IPC分类号： H04L9/30
CPC分类号： H04L9/3073 , H04L9/0861 , H04L9/3093 , H04L9/3263
摘要： A cryptographic communication technology that is based on predicate encryption and that can operate flexibly is provided. A conversion rule information pair is determined in advance, which has attribute conversion rule information prescribing a conversion rule for converting attribute designation information to attribute information used in a predicate encryption algorithm and predicate conversion rule information prescribing a conversion rule for converting predicate designation information to predicate information used in the predicate encryption algorithm. One kind of conversion rule information included in the conversion rule information pair is used to obtain first attribute information or first predicate information from input information. The first attribute information or the first predicate information is used for encryption. Encryption information is decrypted with a decryption key generated by using second attribute information or second predicate information obtained from user information by using the other kind of conversion rule information.
摘要翻译：提供了基于谓词加密并且可以灵活操作的加密通信技术。确定转换规则信息对，其具有规定用于将属性指定信息转换为在谓词加密算法中使用的属性信息的转换规则的属性转换规则信息，以及规定用于将谓词指定信息转换为谓词的转换规则的谓词转换规则信息谓词加密算法中使用的信息。包括在转换规则信息对中的一种转换规则信息用于从输入信息获得第一属性信息或第一谓词信息。第一属性信息或第一谓词信息用于加密。使用通过使用另一种转换规则信息通过使用从用户信息获得的第二属性信息或第二谓词信息生成的解密密钥对加密信息进行解密。

5. 发明申请

US20120033805A1 FINITE FIELD CALCULATION APPARATUS, FINITE FILED CALCULATION METHOD, PROGRAM, AND RECORDING MEDIUM 有权
标题翻译：有限位计算设备，有限填充计算方法，程序和记录介质
公开(公告)号：US20120033805A1
公开(公告)日：2012-02-09
申请号：US13258840
申请日：2010-04-23
申请人： Gen Takahashi , Tetsutaro Kobayashi , Kaku Takeuchi
发明人： Gen Takahashi , Tetsutaro Kobayashi , Kaku Takeuchi
IPC分类号： H04L9/28
CPC分类号： H04L9/3073 , G06F7/724 , G06F2207/7209 , H04L9/3093
摘要： A calculation Πi=0N−1e(R(i, 0), . . . , R(i, K−1)) where a calculation of K elements R(i, k)∈GF(pm) of a finite field GF(pm) over a finite field is expressed as e(R(i, 0), . . . , R(i, K−1)) is efficiently performed. Polynomials poly(R(i, 0), . . . , R(i, K−1)) that express a d-th-order extension field of the finite field GF(pm), which are obtained by the calculations e(R(i, 0), . . . , R(i, K−1)) for different values of i, are multiplied by each other, and a cumulative multiplication of the products is performed, for example. The polynomial poly(R(i, 0), . . . , R(i, K−1)) is a mapping from the input elements of the finite field GF(pm), and the coefficients of at least some of the terms thereof are 0. The same process is performed for different sets of values of i, and the calculation Πi=0N−1e(R(i, 0), . . . , R(i, K−1)) is performed using the result.
摘要翻译：计算＆Pgr; i = 0N-1e（R（i，0），...，R（i，K-1））其中有限元的K个元素R（i，k）∈GF（pm）在有限域上的场GF（pm）被表示为e（R（i，0），...，R（i，K-1））。表示有限域GF（pm）的d阶扩展场的多项式poly（R（i，0），...，R（i，K-1）），其通过计算得到例如，对于i的不同值的R（i，0），...，R（i，K-1））彼此相乘，并且执行乘积的累积乘法。多项式poly（R（i，0），...，R（i，K-1））是从有限域GF（pm）的输入元素的映射，以及至少一些术语的系数对于不同的i值集合执行相同的处理，并且执行计算＆Pgr; i = 0N-1e（R（i，0），...，R（i，K-1））使用结果。

6. 发明授权

US08488780B2 Finite field calculation apparatus, finite field calculation method and recording medium 有权
标题翻译：有限域计算装置，有限域计算方法和记录介质
公开(公告)号：US08488780B2
公开(公告)日：2013-07-16
申请号：US13258840
申请日：2010-04-23
申请人： Gen Takahashi , Tetsutaro Kobayashi , Kaku Takeuchi
发明人： Gen Takahashi , Tetsutaro Kobayashi , Kaku Takeuchi
IPC分类号： H04L29/06
CPC分类号： H04L9/3073 , G06F7/724 , G06F2207/7209 , H04L9/3093
摘要： A calculation Πi=0N−1e(R(i, 0), . . . , R(i, K−1)) where a calculation of K elements R(i, k)εGF(pm) of a finite field GF(pm) over a finite field is expressed as e(R(i, 0), . . . , R(i, K−1)) is efficiently performed. Polynomials poly(R(i, 0), . . . , R(i, K−1)) that express a d-th-order extension field of the finite field GF(pm), which are obtained by the calculations e(R(i, 0), . . . , R(i, K−1)) for different values of i, are multiplied by each other, and a cumulative multiplication of the products is performed, for example. The polynomial poly(R(i, 0), . . . , R(i, K−1)) is a mapping from the input elements of the finite field GF(pm), and the coefficients of at least some of the terms thereof are 0. The same process is performed for different sets of values of i, and the calculation Πi=0N−1e(R(i, 0), . . . , R(i, K−1)) is performed using the result.
摘要翻译：计算Pii = 0N-1e（R（i，0），...，R（i，K-1）），其中计算有限域GF（的K元素R（i，k）epsilonGF（pm）在有限域上表示为e（R（i，0），...，R（i，K-1））。表示有限域GF（pm）的d阶扩展场的多项式poly（R（i，0），...，R（i，K-1）），其通过计算得到例如，对于i的不同值的R（i，0），...，R（i，K-1））彼此相乘，并且执行乘积的累积乘法。多项式poly（R（i，0），...，R（i，K-1））是从有限域GF（pm）的输入元素的映射，以及至少一些术语的系数对于i的不同值集合执行相同的处理，并且使用以下步骤执行计算Pii = 0N-1e（R（i，0），...，R（i，K-1））结果。

7. 发明授权

US09607158B2 Proxy computing system, computing apparatus, capability providing apparatus, proxy computing method, capability providing method, program, and recording medium 有权
公开(公告)号：US09607158B2
公开(公告)日：2017-03-28
申请号：US13881111
申请日：2011-10-25
申请人： Go Yamamoto , Tetsutaro Kobayashi
发明人： Go Yamamoto , Tetsutaro Kobayashi
IPC分类号： G06F21/60 , H04L9/00 , H04L9/30
CPC分类号： H04L9/0618 , G06F21/602 , H04L9/006 , H04L9/008 , H04L9/14 , H04L9/3013 , H04L9/3073 , H04L2209/08 , H04L2209/76
摘要： A computing apparatus outputs τ1 and τ2 corresponding to a ciphertext x, a capability providing apparatus uses τ1 to correctly compute f(τ1) with a probability greater than a certain probability and sets the result of the computation as z1, uses τ2 to correctly compute f(τ2) with a probability greater than a certain probability and sets the result of the computation as z2, the computing apparatus generates a computation result u=f(x)bx1 from z1, generates a computation result v=f(x)ax2 from z2, and outputs ub′va′ if the computation results u and v satisfy a particular relation, where G and H are groups, f(x) is a function for obtaining an element of the group G for xεH, X1 and X2 are random variables having values in the group G, x1 is a realization of the random variable X1, and x2 is a realization of the random variable X2.

8. 发明申请

US20130318360A1 PROXY COMPUTING SYSTEM, COMPUTING APPARATUS, CAPABILITY PROVIDING APPARATUS, PROXY COMPUTING METHOD, CAPABILITY PROVIDING METHOD, PROGRAM, AND RECORDING MEDIUM 有权
标题翻译：代理计算系统，计算机，能力提供设备，代理计算方法，能力提供方法，程序和记录介质
公开(公告)号：US20130318360A1
公开(公告)日：2013-11-28
申请号：US13881111
申请日：2011-10-25
申请人： Go Yamamoto , Tetsutaro Kobayashi
发明人： Go Yamamoto , Tetsutaro Kobayashi
IPC分类号： G06F21/60
CPC分类号： H04L9/0618 , G06F21/602 , H04L9/006 , H04L9/008 , H04L9/14 , H04L9/3013 , H04L9/3073 , H04L2209/08 , H04L2209/76
摘要： A computing apparatus outputs τ1 and τ2 corresponding to a ciphertext x, a capability providing apparatus uses τ1 to correctly compute f(τ1) with a probability greater than a certain probability and sets the result of the computation as z1, uses τ2 to correctly compute f(τ2) with a probability greater than a certain probability and sets the result of the computation as z2, the computing apparatus generates a computation result u=f(x)bx1 from z1, generates a computation result v=f(x)ax2 from z2, and outputs ub′va′ if the computation results u and v satisfy a particular relation, where G and H are groups, f(x) is a function for obtaining an element of the group G for xεH, X1 and X2 are random variables having values in the group G, x1 is a realization of the random variable X1, and x2 is a realization of the random variable X2.
摘要翻译：计算装置输出对应于密文x的tau1和tau2，能力提供装置使用tau1以大于某一概率的概率正确计算f（τ1），并将计算结果设置为z1，使用tau2正确地计算f （τ2），其计算结果设定为z2，计算装置从z1生成计算结果u = f（x）bx1，生成计算结果v = f（x）ax2，从 z2，并且如果计算结果u和v满足特定关系，则输出ub'va'，其中G和H是组，f（x）是用于获得用于xepsilon的组G的元素的函数，X 1和X 2是随机的具有组G，x1中的值的变量是随机变量X1的实现，x2是随机变量X2的实现。

9. 发明授权

US06795553B1 Method and apparatus for modular inversion for information security and recording medium with a program for implementing the method 有权
标题翻译：用于信息安全和记录介质的模块化反演的方法和装置，具有用于实现该方法的程序
公开(公告)号：US06795553B1
公开(公告)日：2004-09-21
申请号：US09185626
申请日：1998-11-04
申请人： Tetsutaro Kobayashi , Hikaru Morita
发明人： Tetsutaro Kobayashi , Hikaru Morita
IPC分类号： H04L928
CPC分类号： G06F7/728
摘要： Values X and N of n bits and a parameter t are input, then Y=X2−t mod N is calculated, then an extended binary GCD algorithm is executed for Y to obtain S=y−12k mod N and k, and R=S2−(k+t−2n) is calculated for S, thereby obtaining a Montgomery inverse R=X−I22n mod N of X on a residue class ring Z/NZ.
摘要翻译：输入n位和参数t的值X和N，然后计算Y = X2 <-t> mod N，然后对Y执行扩展二进制GCD算法以获得S = y <2> 对于S，对于S N和k，并且R = S2 < - （k + t-2n）>，从而获得残留类别Z上的X的蒙哥马利反R = X 1 -I 2 / NZ。

10. 发明授权

US09542155B2 Proxy calculation system, method, request device and program thereof 有权
标题翻译：代理计算系统，方法，请求装置及程序
公开(公告)号：US09542155B2
公开(公告)日：2017-01-10
申请号：US14002481
申请日：2012-03-02
申请人： Go Yamamoto , Tetsutaro Kobayashi
发明人： Go Yamamoto , Tetsutaro Kobayashi
IPC分类号： G06F7/58 , H04L9/00
CPC分类号： G06F7/58 , H04L9/00 , H04L2209/26
摘要： Where G and H are cyclic groups, M is an integer of two or more, i=1, . . . , M, f is a homomorphic function of mapping a member xi of group H to group G, Ri and R0 are random variables with a value in group G, ri is a realized value of the random variable Ri,, r0 is a realized value of the random variable R0, and ai is a random number of an integer of 0 or more, a random number generation unit 11 generates random numbers a1, a2, . . . , aM. A sampler 21 is capable of calculating f(x1)r1, f(x2)r2, . . . , f(xM)rM to obtain a calculation result thereof as z1, z2, . . . , zM, respectively. A power calculation unit 12 calculates (z1)a1, (z2)a2, . . . , (zM)aM. An extended randomizable sampler 22 is capable of calculating f(x1a1×x2a2× . . . ×xMaM)r0 to obtain a calculation result z0 thereof. A determination unit 16 determines whether or not (z1)a1×(z2)a2× . . . ×(zM)aM=z0.
摘要翻译：其中G和H为环状基团，M为2以上的整数，i = 1。。。，M，f是将组H的成员xi映射到组G的同态函数，Ri和R0是具有组G中的值的随机变量，ri是随机变量Ri的实现值，r0是实现值随机数生成单元11生成随机数变量R0，并且ai是0以上的整数的随机数，随机数生成单元11生成随机数a1，a2。。。，aM。采样器21能够计算f（x1）r1，f（x2）r2。。。，f（xM）rM以获得其计算结果为z1，z2，...。。。，zM。功率计算单元12计算（z1）a1，（z2）a2，...。。。，（zM）aM。扩展的随机抽样器22能够计算f（x1a1×x2a2×...×xMaM）r0以获得其计算结果z0。确定单元16确定（z1）a1×（z2）a2×。。。 ×（zM）aM = z0。

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