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1. 发明授权

US11003681B2 Anonymization system 有权
公开(公告)号：US11003681B2
公开(公告)日：2021-05-11
申请号：US15444654
申请日：2017-02-28
申请人： Kabushiki Kaisha Toshiba , Toshiba Solutions Corporation
发明人： Masanobu Koike , Yoshihiro Fujii
IPC分类号： G06F16/25 , G06F21/62 , G06F7/02
摘要： According to one embodiment, there is provided an anonymization system including at least one encryption apparatus, an anonymization apparatus, and a decryption apparatus. The encryption apparatus store personal data including one or more values for each item, and generates encrypted data from the personal data by encrypting the one or more values for each item included in the personal data. The anonymization apparatus generates encrypted anonymized data from the encrypted data without decryption by anonymizing one or more values for at least a portion of the items of the encrypted data. The decryption apparatus generates anonymized data from the encrypted anonymized data by decrypting the encrypted anonymized data.

2. 发明授权

US09246683B2 Re-encryption key generator, re-encryption apparatus, and program 有权
标题翻译：重新加密密钥生成器，重新加密设备和程序
公开(公告)号：US09246683B2
公开(公告)日：2016-01-26
申请号：US14063553
申请日：2013-10-25
申请人： Kabushiki Kaisha Toshiba , Toshiba Solutions Corporation
发明人： Ryotaro Hayashi , Tatsuyuki Matsushita , Yoshihiro Fujii , Takuya Yoshida , Koji Okada
IPC分类号： H04L9/00 , H04L9/14 , H04L9/30 , H04L9/08
CPC分类号： H04L9/14 , H04L9/0861 , H04L9/3073
摘要： A re-encryption key generator according to an embodiment generates a re-encryption key required to re-encrypt, without decrypting, ciphertext data obtained by encrypting plaintext data by means of a first public key of a first user device to obtain re-encrypted text data which can be decrypted by a second private key of a second user device. The first storage device stores a first private key corresponding to the first public key. The second storage device stores a second public key corresponding to the second private key. The re-encryption key generation device generates the re-encryption key based on the first private key, the second public key, and the first random number.
摘要翻译：根据实施例的重新加密密钥生成器生成重新加密所需的重新加密密钥，而不解密通过第一用户设备的第一公钥加密明文数据而获得的密文数据，以获得重新加密的文本可以由第二用户设备的第二私钥解密的数据。第一存储装置存储对应于第一公钥的第一私钥。第二存储装置存储对应于第二私钥的第二公钥。再加密密钥生成装置基于第一私钥，第二公钥和第一随机数生成再加密密钥。

3. 发明授权

US09635001B2 Re-encryption system, re-encryption apparatus, and program 有权
公开(公告)号：US09635001B2
公开(公告)日：2017-04-25
申请号：US14274234
申请日：2014-05-09
申请人： Kabushiki Kaisha Toshiba , Toshiba Solutions Corporation
发明人： Yuki Kaseda , Takuya Yoshida , Yoshihiro Fujii , Shingo Abe , Masataka Yamada
IPC分类号： H04L9/00 , H04L29/06 , H04L9/08 , H04L9/14 , G06F21/62
CPC分类号： H04L63/045 , G06F21/6218 , H04L9/0825 , H04L9/0833 , H04L9/14 , H04L63/0464 , H04L63/062 , H04L2209/76
摘要： A re-encryption system according to this embodiment includes a file sharing apparatus and a re-encryption apparatus. Upon receiving a file request from the client apparatus, the file sharing apparatus acquires a first encrypted file based on the file request, and transmits a re-encryption request including the first encrypted file to the re-encryption apparatus. The re-encryption apparatus re-encrypts the first encrypted file included in the re-encryption request to the second encrypted file based on the re-encryption key, and transmits the second encrypted file to the file sharing apparatus. The file sharing apparatus transmits the second encrypted file to the client apparatus. The client apparatus obtains the file by decrypting the second encrypted file based on a private key corresponding to the public key of the member.

4. 发明授权

US09426131B2 Server apparatus and program to re-encrypt ciphertext data 有权
标题翻译：服务器设备和程序重新加密密文数据
公开(公告)号：US09426131B2
公开(公告)日：2016-08-23
申请号：US14219747
申请日：2014-03-19
申请人： Kabushiki Kaisha Toshiba , Toshiba Solutions Corporation
发明人： Ryotaro Hayashi , Tatsuyuki Matsushita , Yoshihiro Fujii , Takuya Yoshida , Koji Okada
IPC分类号： H04L29/06 , H04L9/08 , H04L9/14
CPC分类号： H04L63/0471 , H04L9/0819 , H04L9/0822 , H04L9/0825 , H04L9/0833 , H04L9/0861 , H04L9/0869 , H04L9/0894 , H04L9/14 , H04L2209/76
摘要： A server apparatus according to an embodiment generates a random number on receiving from a user apparatus a notification showing that a re-encryption key should be updated, and calculates re-encryption key data on the basis of the re-encryption key stored and the random number generated. The server apparatus transmits the re-encryption key to the user apparatus and receives, from the user apparatus, the user private key not updated yet and re-encryption key updating data calculated from the re-encryption key data on the basis of the user private key updated. The server apparatus calculates the re-encryption key updated, on the basis of the re-encryption key updating data and the random number, and replaces the re-encryption key stored in the storage device with the updated re-encryption key.
摘要翻译：根据实施例的服务器装置在从用户装置接收到的情况下生成随机数，该通知表示应当更新重新加密密钥，并且基于存储的重新加密密钥和随机数来计算重新加密密钥数据数字生成。服务器装置向用户装置发送重新加密密钥，并从用户装置接收未更新的用户私钥，并根据用户私有从重新加密密钥数据计算出的重新加密密钥更新数据密钥更新。服务器装置根据重新加密密钥更新数据和随机数计算更新的重新加密密钥，并用更新的重新加密密钥替换存储在存储装置中的重新加密密钥。

5. 发明申请

US20140050318A1 RE-ENCRYPTION KEY GENERATOR, RE-ENCRYPTION APPARATUS, AND PROGRAM 有权
标题翻译：重新加密密钥生成器，重新加密设备和程序
公开(公告)号：US20140050318A1
公开(公告)日：2014-02-20
申请号：US14063553
申请日：2013-10-25
申请人： Toshiba Solutions Corporation , Kabushiki Kaisha Toshiba
发明人： Ryotaro Hayashi , Tatsuyuki Matsushita , Yoshihiro Fujii , Takuya Yoshida , Koji Okada
IPC分类号： H04L9/14
CPC分类号： H04L9/14 , H04L9/0861 , H04L9/3073
摘要： A re-encryption key generator according to an embodiment generates a re-encryption key required to re-encrypt, without decrypting, ciphertext data obtained by encrypting plaintext data by means of a first public key of a first user device to obtain re-encrypted text data which can be decrypted by a second private key of a second user device. The first storage device stores a first private key corresponding to the first public key. The second storage device stores a second public key corresponding to the second private key. The re-encryption key generation device generates the re-encryption key based on the first private key, the second public key, and the first random number.
摘要翻译：根据实施例的重新加密密钥生成器生成重新加密所需的重新加密密钥，而不解密通过第一用户设备的第一公钥加密明文数据而获得的密文数据，以获得重新加密的文本可以由第二用户设备的第二私钥解密的数据。第一存储装置存储对应于第一公开密钥的第一私钥。第二存储装置存储对应于第二私钥的第二公钥。再加密密钥生成装置基于第一私钥，第二公钥和第一随机数生成再加密密钥。

6. 发明授权

US09698984B2 Re-encrypted data verification program, re-encryption apparatus and re-encryption system 有权
公开(公告)号：US09698984B2
公开(公告)日：2017-07-04
申请号：US14480073
申请日：2014-09-08
申请人： Kabushiki Kaisha Toshiba , Toshiba Solutions Corporation
发明人： Yoshihiro Fujii , Takuya Yoshida , Koji Okada
IPC分类号： H04L29/06 , G06F21/00 , H04L9/14 , H04L9/08 , H04L9/30 , H04L9/32
CPC分类号： H04L9/14 , H04L9/0827 , H04L9/30 , H04L9/3073 , H04L9/3247 , H04L2209/24 , H04L2209/76
摘要： In a decryption apparatus according to an embodiment, a holding device pre-holds a verification formula. A determination device performs a calculation based on the verification formula read from the holding device by substituting, into the verification formula, the part of the re-encrypted data received from a re-encryption apparatus and the public key of a re-encryption key generation apparatus and the private key of the decryption apparatus, to determine whether or not the verification formula holds true. An output device outputs verification success when a result of the determination indicates that the verification formula holds true.

7. 发明授权

US10313119B2 Data management device, system, re-encryption device, data sharing device, and storage medium 有权
公开(公告)号：US10313119B2
公开(公告)日：2019-06-04
申请号：US15258316
申请日：2016-09-07
申请人： Kabushiki Kaisha Toshiba , TOSHIBA SOLUTIONS CORPORATION
发明人： Masanobu Koike , Yoshihiro Fujii
IPC分类号： H04L9/08 , H04L9/30
摘要： A data management device according to an embodiment stores first encrypted data obtained by encrypting plain text data with a first public key of a first user device. The data management device stores a first re-encryption key for re-encrypting the first encrypted data without decrypting to obtain first re-encrypted data decryptable with a private key of a second user device. The data management device stores a conversion key generated from a first private key corresponding to the first public key and a second private key of the first user device. The data management device converts the first encrypted data into second encrypted data with the conversion key. The data management device The data management device converts the first re-encryption key into a second re-encryption key with the conversion key.

8. 发明授权

US09819487B2 Re-encryption key generator, re-encryption device, encryption device, decryption device, and program 有权
公开(公告)号：US09819487B2
公开(公告)日：2017-11-14
申请号：US14615561
申请日：2015-02-06
申请人： KABUSHIKI KAISHA TOSHIBA , TOSHIBA SOLUTIONS CORPORATION
发明人： Yoshihiro Fujii , Koji Okada , Tatsuyuki Matsushita , Ryotaro Hayashi
IPC分类号： H04L9/00 , H04L9/08 , H04L9/30 , H04L9/14 , H04L17/02
CPC分类号： H04L9/0869 , H04L9/14 , H04L9/30 , H04L9/3073 , H04L2209/24 , H04L2209/76
摘要： A re-encryption key generator according to an embodiment generates a re-encryption key to obtain re-encrypted data that can be decrypted by a second private key of a second user device by re-encrypting ciphertext obtained by encrypting plaintext by a first public key of a first user device without decryption. The re-encryption key generator stores a first private key corresponding to the first public key. The re-encryption key generator stores a second re-encryption key generation key of the second user device that is different from a second public key corresponding to the second private key. The re-encryption key generator generates the re-encryption key based on the first private key and the second re-encryption key generation key.

9. 发明授权

US09813386B2 Cooperation service providing system and server apparatus 有权
公开(公告)号：US09813386B2
公开(公告)日：2017-11-07
申请号：US14668347
申请日：2015-03-25
申请人： KABUSHIKI KAISHA TOSHIBA , TOSHIBA SOLUTIONS CORPORATION
发明人： Yoshihiro Fujii , Koji Okada , Hiroyuki Mayuzumi , Masahisa Tajiri
IPC分类号： H01L29/06 , H04L29/06 , G06F21/62 , G09C1/00 , H04L9/08 , G06F21/60
CPC分类号： H04L63/0428 , G06F21/602 , G06F21/62 , G06F2221/2107 , G09C1/00 , H04L9/0847 , H04L63/0471 , H04L63/061 , H04L2209/76
摘要： Upon receiving ciphertext data transmitted by each service apparatus, a cooperation apparatus according to an embodiment generates re encrypted data by performing re encryption processing for the ciphertext data using are encryption key. Each of the service apparatuses transmits, to the cooperation apparatus, a request to acquire user information of a user specified by an identification (ID) indicated by the ciphertext data and stored in the other service apparatus, together with the ciphertext data. Upon receiving the re encrypted data transmitted by the cooperation apparatus, the service apparatus acquires an ID by decrypting the re encrypted data using a private key, reads out user information, and transmits the user information to the other service apparatus.

10. 发明授权

US09197410B2 Key management system 有权
标题翻译：密钥管理系统
公开(公告)号：US09197410B2
公开(公告)日：2015-11-24
申请号：US13968885
申请日：2013-08-16
申请人： Kabushiki Kaisha Toshiba
发明人： Takuya Yoshida , Yoshihiro Fujii
IPC分类号： H04L29/06 , H04L9/08 , G06F21/62 , H04L9/14 , G06F21/60
CPC分类号： H04L9/0861 , G06F21/602 , G06F21/62 , H04L9/0825 , H04L9/0827 , H04L9/14 , H04L63/06 , H04L2209/76
摘要： According to one embodiment, a master key management device generates, by using a first secret key stored in a first storage unit and a third public key, a re-encryption key used to re-encrypt a second secret key which is stored in a second storage unit and which is encrypted with a first public key to the second secret key encrypted with the third public key. A key management server device receives the generated re-encryption key from the master key management device while the master key management device and the key management server device are connected to each other, and stores the received re-encryption key in a third storage unit. The master key management device and the key management server device are disconnected after the re-encryption key is stored in the third storage unit.
摘要翻译：根据一个实施例，主密钥管理装置通过使用存储在第一存储单元和第三公钥中的第一秘密密钥生成用于重新加密第二秘密密钥的重新加密密钥，所述第二密钥存储在第二存储单元存储单元，并且用第一公开密钥加密到用第三公钥加密的第二秘密密钥。密钥管理服务器设备在主密钥管理设备和密钥管理服务器设备彼此连接的同时从主密钥管理设备接收生成的重新加密密钥，并将接收到的重新加密密钥存储在第三存储单元中。在主密钥管理设备和密钥管理服务器设备在重新加密密钥存储在第三存储单元中之后被断开。

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