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1. 发明授权

US10985914B2 Key generation device and key generation method 有权
公开(公告)号：US10985914B2
公开(公告)日：2021-04-20
申请号：US15911860
申请日：2018-03-05
申请人： FUJITSU LIMITED
发明人： Yasuo Noguchi , Takeshi Shimoyama
IPC分类号： H04L29/06 , H04L9/08 , H04L9/06 , H03M13/19 , H03M13/11 , H03M13/15 , H03M13/23
摘要： A key generation device includes a generation circuit, a concealment processing unit, and a cryptography processing unit. The generation circuit generates a value dependent on hardware. When acquiring a concealed cryptographic key, the concealment processing unit generates first data by performing a mask process to the concealed cryptographic key by using the value generated by the generation circuit, generates second data by decoding the first data by a first error correction decoding method, and generates a cryptographic key by decoding the second data by a second error correction decoding method. When acquiring the concealed cryptographic key and a plain text or an encrypted text, the cryptography processing unit acquires the cryptographic key corresponding to the concealed cryptographic key from the concealment processing unit, and encrypts the plain text or decrypts the encrypted text by using the cryptographic key.

2. 发明授权

US10129028B2 Relational encryption for password verification 有权
公开(公告)号：US10129028B2
公开(公告)日：2018-11-13
申请号：US15040959
申请日：2016-02-10
申请人： FUJITSU LIMITED
发明人： Ryota Kamakari , Takeshi Shimoyama , Hiroshi Tsuda , Yoshinori Yaginuma , Avradip Mandal , Arnab Roy , Hart Montgomery , Toshiyuki Ishiguro , Kouhei Shigeta
IPC分类号： G06F21/32 , H04L9/32 , H04L29/06
摘要： A method of equality verification using relational encryption including receiving a relational key that includes a first relational key component and a registration ciphertext that includes an encryption of a first plaintext data set. The method includes storing the registration ciphertext without decrypting the registration ciphertext. After the storing of the registration ciphertext, the method includes receiving an authentication request and communicating a safeguard data set that includes a random challenge in response to the authentication request. The method includes receiving an encrypted response that is generated based on the safeguard data set and a second plaintext data set. The method includes verifying a relationship between the encrypted response and the registration ciphertext using the relational key without decrypting the encrypted response and without decrypting the registration ciphertext. The relationship indicates that equality exists between the first and the second plaintext data sets.

3. 发明授权

US10020933B2 Cryptographic processing device and cryptographic processing method 有权
公开(公告)号：US10020933B2
公开(公告)日：2018-07-10
申请号：US14934740
申请日：2015-11-06
申请人： FUJITSU LIMITED
发明人： Masaya Yasuda , Takeshi Shimoyama , Jun Kogure
IPC分类号： H04L9/00 , H04L29/06 , H04L9/14
CPC分类号： H04L9/008 , H04L9/14 , H04L63/0861 , H04L2209/046 , H04L2209/08
摘要： A memory stores therein first cryptographic information that represents an encrypted polynomial obtained by encrypting a first polynomial that corresponds to a first vector. From a terminal that receives second cryptographic information that represents an encrypted monomial obtained by encrypting a monomial generated by use of a random number, a receiver receives third cryptographic information that represents an encrypted result obtained by encrypting a result of a multiplication of a second polynomial that corresponds to a second vector by the monomial. A processor generates an encrypted polynomial that includes a result of an operation of the first vector and the second vector by use of the first cryptographic information, the third cryptographic information, and information that represents the monomial. An output interface outputs fourth cryptographic information that represents the encrypted polynomial generated by the generator.

4. 发明申请

US20160173275A1 CRYPTOGRAPHIC PROCESSING DEVICE AND CRYPTOGRAPHIC PROCESSING METHOD 有权
标题翻译： CRYPTOGRAPHIC PROCESSING DEVICE和CRYPTOGRAPHIC PROCESSING METHOD
公开(公告)号：US20160173275A1
公开(公告)日：2016-06-16
申请号：US14934740
申请日：2015-11-06
申请人： FUJITSU LIMITED
发明人： MASAYA YASUDA , Takeshi Shimoyama , Jun KOGURE
IPC分类号： H04L9/00 , H04L9/14
CPC分类号： H04L9/008 , H04L9/14 , H04L63/0861 , H04L2209/046 , H04L2209/08
摘要： A memory stores therein first cryptographic information that represents an encrypted polynomial obtained by encrypting a first polynomial that corresponds to a first vector. From a terminal that receives second cryptographic information that represents an encrypted monomial obtained by encrypting a monomial generated by use of a random number, a receiver receives third cryptographic information that represents an encrypted result obtained by encrypting a result of a multiplication of a second polynomial that corresponds to a second vector by the monomial. A processor generates an encrypted polynomial that includes a result of an operation of the first vector and the second vector by use of the first cryptographic information, the third cryptographic information, and information that represents the monomial. An output interface outputs fourth cryptographic information that represents the encrypted polynomial generated by the generator.
摘要翻译：存储器存储表示通过加密与第一向量对应的第一多项式而获得的加密多项式的第一密码信息。从接收代表通过使用随机数生成的加密单项获得的加密单项的第二加密信息的终端，接收器接收表示通过加密第二多项式的乘法结果而获得的加密结果的第三加密信息，对应于通过单项式的第二向量。处理器通过使用第一密码信息，第三密码信息和表示单项式的信息来生成包括第一向量和第二向量的操作结果的加密多项式。输出接口输出代表发生器生成的加密多项式的第四密码信息。

5. 发明授权

US11431489B2 Encryption processing system and encryption processing method 有权
公开(公告)号：US11431489B2
公开(公告)日：2022-08-30
申请号：US17081491
申请日：2020-10-27
申请人： FUJITSU LIMITED
发明人： Toshiya Shimizu , Takeshi Shimoyama , Goichiro Hanaoka , Yusuke Sakai , Seonghan Shin
IPC分类号： H04L9/08 , H04L9/32
摘要： An encryption processing system includes: a first device; second devices; and a third device, wherein the first device generates synthesis keys by selecting public keys of the second devices; generates an intermediate text from confidential texts generated by encrypting secret information by using public keys of the second devices having decryption authority; generates ciphertexts by further encrypting the intermediate text using the synthesis keys; and makes public the ciphertexts, each of the second devices verifies validity of the ciphertexts; generates decryption key fragments by using an own private key; and makes public the decryption key fragments, the third device verifies validity of the decryption key fragments; generates a decryption key by combining decryption key fragments; generates the Intermediate text by decrypting one of the ciphertexts; and makes public the intermediate text, and the second device decrypts the intermediate text using the own private key; and restores the secret information.

6. 发明授权

US09722782B2 Information processing method, recording medium, and information processing apparatus 有权
公开(公告)号：US09722782B2
公开(公告)日：2017-08-01
申请号：US14930752
申请日：2015-11-03
申请人： FUJITSU LIMITED
发明人： Masaya Yasuda , Takeshi Shimoyama , Jun Kogure
IPC分类号： H04L9/00 , H04L9/32 , H04L9/08 , G06F21/32 , H04L29/06 , H04L9/30
CPC分类号： H04L9/0819 , G06F21/32 , G06F2221/2117 , H04L9/008 , H04L9/0869 , H04L9/3093 , H04L9/3231 , H04L63/0861 , H04L2209/24
摘要： An information processing method according to an embodiment causes a computer to execute a process of receiving an input of matching information encrypted with an encryption algorithm allowing a Hamming distance to be calculated with the matching information encrypted. The information processing method also causes the computer to execute a process of calculating a first Hamming distance between the received matching information and registered information that is different from encrypted registered information of a user, the registered information being encrypted with the encryption algorithm, using a processor. The information processing method also causes the computer to execute a process of determining legitimacy of the matching information based on whether the calculated first Hamming distance falls into a distance distribution representing matches with another person that is different from the user, using a processor.

7. 发明授权

US09509493B2 Information processing technique for secure pattern matching 有权
标题翻译：用于安全模式匹配的信息处理技术
公开(公告)号：US09509493B2
公开(公告)日：2016-11-29
申请号：US14446772
申请日：2014-07-30
申请人： FUJITSU LIMITED
发明人： Masaya Yasuda , Takeshi Shimoyama , Jun Kogure
IPC分类号： G06F21/00 , H04L9/00 , H04L9/14
CPC分类号： H04L9/008 , H04L9/14 , H04L2209/24
摘要： An encrypted first polynomial that is obtained by encrypting, in a homomorphic encryption method that handles a polynomial processing, a first polynomial, is received from another computer. The first polynomial is represented by using, as coefficients, components of a first binary vector generated from first data in first order that is either ascending order or descending order with respect to degree of the first polynomial. Then, a predetermined processing in an encrypted text space is performed by using the encrypted first polynomial and an encrypted second polynomial that is obtained by encrypting a second polynomial in the homomorphic encryption method. The second polynomial is represented by using, as coefficients, components of a second binary vector generated from second data in second order that is different from the first order with respect to degree of the second polynomial. Then, a result of the predetermined processing is sent back.
摘要翻译：通过从处理多项式处理的同态加密方法中加密第一多项式获得的加密的第一多项式从另一计算机接收。第一个多项式通过使用从第一个数据的第一个数据生成的第一个二进制向量的分量来表示，该第一个二进制向量是按照第一个多项式的程度的升序或降序。然后，通过使用加密的第一多项式和通过在同形加密方法中加密第二多项式获得的加密的第二多项式来执行加密文本空间中的预定处理。第二个多项式通过使用与第二次数相对于第二个多项式的程度不同于第一阶数的第二数据生成的第二二进制向量的分量来表示。然后，返回预定处理的结果。

8. 发明申请

US20160182226A1 INFORMATION PROCESSING METHOD, RECORDING MEDIUM, AND INFORMATION PROCESSING APPARATUS 有权
标题翻译：信息处理方法，记录媒体和信息处理装置
公开(公告)号：US20160182226A1
公开(公告)日：2016-06-23
申请号：US14930752
申请日：2015-11-03
申请人： FUJITSU LIMITED
发明人： MASAYA YASUDA , Takeshi Shimoyama , Jun KOGURE
IPC分类号： H04L9/08 , H04L9/00
CPC分类号： H04L9/0819 , G06F21/32 , G06F2221/2117 , H04L9/008 , H04L9/0869 , H04L9/3093 , H04L9/3231 , H04L63/0861 , H04L2209/24
摘要： An information processing method according to an embodiment causes a computer to execute a process of receiving an input of matching information encrypted with an encryption algorithm allowing a Hamming distance to be calculated with the matching information encrypted. The information processing method also causes the computer to execute a process of calculating a first Hamming distance between the received matching information and registered information that is different from encrypted registered information of a user, the registered information being encrypted with the encryption algorithm, using a processor. The information processing method also causes the computer to execute a process of determining legitimacy of the matching information based on whether the calculated first Hamming distance falls into a distance distribution representing matches with another person that is different from the user, using a processor.
摘要翻译：根据实施例的信息处理方法使得计算机执行接收用加密算法加密的匹配信息的输入的处理，允许使用加密的匹配信息计算汉明距离。信息处理方法还使得计算机执行计算接收到的匹配信息与与用户的加密注册信息不同的注册信息之间的第一汉明距离的处理，所述注册信息使用加密算法加密，使用处理器。信息处理方法还使得计算机使用处理器，基于所计算的第一汉明距离是否落入与用户不同的另一个人的匹配的距离分布中来执行确定匹配信息的合法性的处理。

9. 发明授权

US09166785B2 Cryptography processing device and cryptography processing method 有权
标题翻译：密码处理设备和加密处理方法
公开(公告)号：US09166785B2
公开(公告)日：2015-10-20
申请号：US14104409
申请日：2013-12-12
申请人： FUJITSU LIMITED
发明人： Masaya Yasuda , Takeshi Shimoyama , Jun Kogure
IPC分类号： H04L9/00 , H04L9/08 , H04K1/00 , H04L9/28
CPC分类号： H04L9/0861 , H04L9/008 , H04L9/08
摘要： A device that uses homomorphic encryption is disclosed. The device includes a public key data generator configured to generate public key data, and a secret key data generator configured to generate secret key data that includes, as a secret key, an integer that is an element of a matrix obtained as a product of the first public key matrix element and an inverse matrix of the secret key matrix and that is not a multiple of the plain text space size.
摘要翻译：公开了一种使用同态加密的设备。该设备包括被配置为生成公开密钥数据的公开密钥数据生成器，以及秘密密钥数据生成器，被配置为生成秘密密钥数据，该秘密密钥数据生成器包括作为秘密密钥的整数，该整数是作为第一公钥矩阵元素和秘密密钥矩阵的逆矩阵，并且不是纯文本空间大小的倍数。

10. 发明授权

US09660991B2 Relational encryption 有权
公开(公告)号：US09660991B2
公开(公告)日：2017-05-23
申请号：US15040950
申请日：2016-02-10
申请人： FUJITSU LIMITED
发明人： Ryota Kamakari , Takeshi Shimoyama , Hiroshi Tsuda , Yoshinori Yaginuma , Avradip Mandal , Arnab Roy , Hart Montgomery , Toshiyuki Ishiguro , Kouhei Shigeta
IPC分类号： H04L29/06
CPC分类号： H04L63/0884 , G06F21/32 , G06F21/6245 , G06K2009/00953 , H04L9/002 , H04L9/304 , H04L9/3073 , H04L9/3231 , H04L63/0407 , H04L63/06 , H04L63/0861
摘要： A method includes receiving biometric data, the biometric data non-uniformly distributed and processing the biometric data to a level of randomness as a plaintext vector, the level of randomness associated with a security level. The method also includes encrypting the plaintext vector using a relational linearity encryption scheme to generate a linearity ciphertext representative of the plaintext vector, encrypting the plaintext vector using a relational proximity encryption scheme to generate a proximity ciphertext representative of the plaintext vector, and communicating the linearity ciphertext and the proximity ciphertext to an authentication server. The method further includes receiving from the authentication server an authentication signal for the security level indicative of a linearity relationship between the linearity ciphertext and a registration linearity ciphertext discovered using a relational linearity key and of a proximity relationship between the proximity ciphertext and a registration proximity ciphertext detected using a relational proximity key.

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