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1. 发明授权

US10187207B2 Re-encryption key generator, re-encryption apparatus, encryption apparatus, decryption apparatus, and storage medium 有权
公开(公告)号：US10187207B2
公开(公告)日：2019-01-22
申请号：US15261584
申请日：2016-09-09
申请人： KABUSHIKI KAISHA TOSHIBA , TOSHIBA SOLUTIONS CORPORATION
发明人： Ryotaro Hayashi , Tatsuyuki Matsushita
IPC分类号： H04L9/00 , H04L9/08 , H04L9/14 , H04L9/30
摘要： According to one embodiment, a re-encryption key generator which generates the re-encryption key based on the first private key, the second re-encryption key generation key, and a plurality of random numbers. The second re-encryption key generation key comprises a plurality of system-specific values and the second private key. The re-encryption key includes an exponent having a numerator portion and a denominator portion or a scalar having a numerator portion and a denominator portion. The numerator portion is in form of a linear coupling of the second private key on which at least one of a plurality of private values specifying relations between the system-specific values and the random numbers is allowed to act. The denominator portion is the first private key.

2. 发明授权

US10116439B2 Encrypted data computation system, device, and program 有权
公开(公告)号：US10116439B2
公开(公告)日：2018-10-30
申请号：US14851684
申请日：2015-09-11
申请人： KABUSHIKI KAISHA TOSHIBA , TOSHIBA SOLUTIONS CORPORATION
发明人： Masanobu Koike , Ryotaro Hayashi , Tatsuyuki Matsushita
IPC分类号： H04L9/08 , H04L9/30 , H04L9/14 , H04L29/06
摘要： According to one embodiment, an encryption device encrypts each of numerical values based on an encryption key, and generates encrypted data. On the basis of each of the encrypted data, a computation device generates a primary computation result corresponding to data in which a computation result of an expression that has added and subtracted each of the numerical values is encrypted. On the basis of the primary computation result, a secondary computation key and random numbers, a computation assist device generates a secondary computation result. The computation device generates a tertiary computation result based on the secondary computation result and a tertiary computation key, and decides the magnitude relation between a minuend and a subtrahend in the expression based on the tertiary computation result.

3. 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。

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

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.

7. 发明授权

US09319389B2 Data recording device, and method of processing data recording device 有权
标题翻译：数据记录装置及数据记录装置的处理方法
公开(公告)号：US09319389B2
公开(公告)日：2016-04-19
申请号：US14293428
申请日：2014-06-02
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Taku Kato , Yuji Nagai , Tatsuyuki Matsushita
IPC分类号： G06F21/00 , H04L29/06 , H04L9/08 , H04L9/32 , G06F21/72 , G06F21/73 , G06F21/44 , G06F21/78 , G06F21/85
CPC分类号： H04L63/061 , G06F21/44 , G06F21/445 , G06F21/72 , G06F21/73 , G06F21/78 , G06F21/85 , H04L9/0844 , H04L9/0866 , H04L9/0869 , H04L9/3247 , H04L9/3263 , H04L2209/60
摘要： A controller is provided with a controller key and a first controller identification information unique to the controller. The controller generates a controller unique key unique to a respective controller based on the controller key and the first controller identification information, and a second controller identification information based on the first controller identification information. A decryptor decrypts the encrypted medium device key using the controller unique key to obtain a medium device key. An authentication/key exchange process unit performs authentication/key exchange process with the host device through an interface unit using the medium device key, the medium device key certificate and the second controller identification information to establish a secure channel.
摘要翻译：控制器具有控制器键和控制器独有的第一控制器识别信息。所述控制器基于所述控制器键和所述第一控制器识别信息生成对于相应控制器特有的控制器唯一密钥，以及基于所述第一控制器标识信息的第二控制器识别信息。解密器使用控制器唯一密钥对加密的介质设备密钥进行解密以获得中等设备密钥。认证/密钥交换处理单元通过使用介质设备密钥，介质设备密钥证书和第二控制器标识信息的接口单元与主机设备进行认证/密钥交换处理，以建立安全信道。

8. 发明授权

US09094193B2 Information recording device 有权
标题翻译：信息记录装置
公开(公告)号：US09094193B2
公开(公告)日：2015-07-28
申请号：US14250741
申请日：2014-04-11
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Taku Kato , Yuji Nagai , Tatsuyuki Matsushita
IPC分类号： G06F21/00 , H04L9/08 , H04L9/32 , G06F21/10 , G06F21/44 , G06F21/73 , G06F21/78
CPC分类号： H04L9/0869 , G06F21/10 , G06F21/445 , G06F21/73 , G06F21/78 , G06F2221/0724 , H04L9/0861 , H04L9/0866 , H04L9/3263 , H04L2209/60
摘要： A controller is provided with a controller key and a first controller identification information unique to the controller. The controller generates a controller unique key unique to a respective controller based on the controller key and the first controller identification information, and a second controller identification information based on the first controller identification information. A decryptor decrypts the encrypted medium device key using the controller unique key to obtain a medium device key. An authentication/key exchange process unit performs authentication/key exchange process with the host device through an interface unit using the medium device key and the medium device key certificate to establish the secure channel.
摘要翻译：控制器具有控制器键和控制器独有的第一控制器识别信息。所述控制器基于所述控制器键和所述第一控制器识别信息生成对于相应控制器特有的控制器唯一密钥，以及基于所述第一控制器标识信息的第二控制器识别信息。解密器使用控制器唯一密钥对加密的介质设备密钥进行解密以获得中等设备密钥。认证/密钥交换处理单元通过使用介质设备密钥和介质设备密钥证书的接口单元与主机设备进行认证/密钥交换处理，以建立安全信道。

9. 发明申请

US20140281551A1 DATA RECORDING DEVICE, AND METHOD OF PROCESSING DATA RECORDING DEVICE 有权
标题翻译：数据记录装置，以及处理数据记录装置的方法
公开(公告)号：US20140281551A1
公开(公告)日：2014-09-18
申请号：US14293428
申请日：2014-06-02
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Taku KATO , Yuji Nagai , Tatsuyuki Matsushita
IPC分类号： H04L29/06
CPC分类号： H04L63/061 , G06F21/44 , G06F21/445 , G06F21/72 , G06F21/73 , G06F21/78 , G06F21/85 , H04L9/0844 , H04L9/0866 , H04L9/0869 , H04L9/3247 , H04L9/3263 , H04L2209/60
摘要： A controller is provided with a controller key and a first controller identification information unique to the controller. The controller generates a controller unique key unique to a respective controller based on the controller key and the first controller identification information, and a second controller identification information based on the first controller identification information. A decryptor decrypts the encrypted medium device key using the controller unique key to obtain a medium device key. An authentication/key exchange process unit performs authentication/key exchange process with the host device through an interface unit using the medium device key, the medium device key certificate and the second controller identification information to establish a secure channel.
摘要翻译：控制器具有控制器键和控制器独有的第一控制器识别信息。所述控制器基于所述控制器键和所述第一控制器识别信息生成对于相应控制器特有的控制器唯一密钥，以及基于所述第一控制器标识信息的第二控制器识别信息。解密器使用控制器唯一密钥对加密的介质设备密钥进行解密以获得中等设备密钥。认证/密钥交换处理单元通过使用介质设备密钥，介质设备密钥证书和第二控制器标识信息的接口单元与主机设备进行认证/密钥交换处理，以建立安全信道。

10. 发明申请

US20140250302A1 DEVICE 审中-公开
标题翻译：设备
公开(公告)号：US20140250302A1
公开(公告)日：2014-09-04
申请号：US14257896
申请日：2014-04-21
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Yuji Nagai , Taku Kato , Tatsuyuki Matsushita
IPC分类号： H04L29/06
CPC分类号： H04L63/061 , G06F21/10
摘要： According to one embodiment, a device includes a second data generator configured to generate a session key (SKey) by encrypting a random number (RN) with the second key (HKey) in AES operation; a one-way function processor configured to generate an authentication information (Oneway-ID) by processing the secret identification information (SecretID) with the session key (SKey) in one-way function operation; and a data output interface configured to output the encrypted secret identification information (E-SecretID) and the authentication information (Oneway-ID) to outside of the device.
摘要翻译：根据一个实施例，一种设备包括：第二数据生成器，被配置为通过在AES操作中用第二密钥（HKey）加密随机数（RN）来生成会话密钥（SKey）; 单向功能处理器，被配置为通过在单向功能操作中通过会话密钥（SKey）处理秘密识别信息（SecretID）来生成认证信息（Oneway-ID）; 以及数据输出接口，被配置为将加密的秘密识别信息（E-SecretID）和认证信息（Oneway-ID）输出到设备外部。

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