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1. 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。

2. 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。

3. 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.

4. 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.

5. 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.

6. 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。

7. 发明授权

US10354073B2 Information processor device verifying software and method of controlling information processor device 有权
公开(公告)号：US10354073B2
公开(公告)日：2019-07-16
申请号：US15222060
申请日：2016-07-28
申请人： Kabushiki Kaisha Toshiba
发明人： Ryuiti Koike , Mikio Hashimoto , Naoko Yamada , Ryotaro Hayashi
IPC分类号： G06F9/445 , G06F21/57 , G06F8/656 , G06F9/4401
摘要： According to one embodiment, an information processing device includes a processor, a nonvolatile memory, a designation unit, and a controller. The nonvolatile memory stores the first software and the second software which is used as substitute for the first software. The designation unit designates software to be executed by the processor at a boot. The controller protects an area of the nonvolatile memory storing the first software from being written while the first software is executed by the processor. When third software is executed by the processor, the third software verifies the second software. When the second software is legal in a result of verifying by the third software, the designation unit designates the second software.

8. 发明授权

US09860218B2 Information processing terminal, information processing method, and information processing system 有权
公开(公告)号：US09860218B2
公开(公告)日：2018-01-02
申请号：US14884022
申请日：2015-10-15
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Ryuiti Koike , Mikio Hashimoto , Naoko Yamada , Ryotaro Hayashi
IPC分类号： H04L29/06 , G06F21/57 , G06F21/51 , G06F21/62 , G06F9/445
CPC分类号： H04L63/06 , G06F8/65 , G06F21/51 , G06F21/575 , G06F21/6272 , H04L63/08 , Y02D10/42
摘要： A system software unit performs a first authentication operation with an external device using a first key that is registered in advance. A secure software unit determines whether or not system software satisfies a soundness condition. A dedicated memory unit is used to store a second key. While performing a reregistration operation for reregistering the first key, a system software unit requests the secure software unit to read the second key. When the system software satisfies the soundness condition, the secure software unit generates verification data using the second key. When a second authentication operation performed with the external device using the verification data is successful, the system software unit performs the reregistration operation.

9. 发明申请

US20150370728A1 MEMORY MANAGEMENT DEVICE AND NON-TRANSITORY COMPUTER READABLE STORAGE MEDIUM 有权
标题翻译：内存管理设备和非终端计算机可读存储介质
公开(公告)号：US20150370728A1
公开(公告)日：2015-12-24
申请号：US14744616
申请日：2015-06-19
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Naoko Yamada , Mikio Hashimoto , Ryotaro Hayashi
IPC分类号： G06F12/14 , G06F12/10 , G06F21/64
CPC分类号： G06F12/1416 , G06F12/1009 , G06F21/64 , G06F21/79 , G06F2212/1052 , G06F2212/651
摘要： In one embodiment, a device executes reading and writing for a storage unit storing a table tree and verifier tree. The table tree includes a parent table and child table. The verifier tree includes a parent verifier associated with the parent table, and a child verifier associated with the child table. The parent verifier is used for verifying the child table and the child verifier. The device stores a secure table tree being a part of the table tree and used for address translation, and a secure verifier tree being a part of the verifier tree, to a secure storage unit. The device, when data has a read-only attribute, calculates verification information based on the data and a secure value varying according as the data is updated, and executes verification based on a verifier corresponded to the data and the verification information.
摘要翻译：在一个实施例中，设备对存储表格树和验证器树的存储单元执行读取和写入。表格树包括父表和子表。验证器树包括与父表相关联的父验证器和与子表相关联的子检验器。父验证器用于验证子表和子检验器。设备存储作为表树的一部分并用于地址转换的安全表树和作为验证器树的一部分的安全验证器树到安全存储单元。当数据具有只读属性时，该设备基于数据和根据更新数据而变化的安全值来计算验证信息，并且基于与数据和验证信息对应的验证器执行验证。

10. 发明申请

US20150370727A1 MEMORY MANAGEMENT DEVICE AND NON-TRANSITORY COMPUTER READABLE STORAGE MEDIUM 有权
标题翻译：内存管理设备和非终端计算机可读存储介质
公开(公告)号：US20150370727A1
公开(公告)日：2015-12-24
申请号：US14744540
申请日：2015-06-19
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Mikio HASHIMOTO , Naoko Yamada , Jun Kanai , Ryotaro Hayashi
IPC分类号： G06F12/14 , G06F12/10 , G06F21/64
CPC分类号： G06F12/1416 , G06F12/1009 , G06F12/145 , G06F21/64 , G06F21/79 , G06F2212/651
摘要： In one embodiment, a device executes reading and writing for a storage unit storing a table tree and verifier tree. The table tree includes a parent table and child table. The verifier tree includes a parent verifier associated with the parent table, and a child verifier associated with the child table. The parent verifier is used for verifying the child table and child verifier. The device stores a secure table tree being a part of the table tree and used for address translation, and a secure verifier tree being a part of the verifier tree, to a secure storage unit. The device executes verification, based on verification information calculated based on a first child table and first child verifier in the storage unit and a first parent verifier in the secure verifier tree.
摘要翻译：在一个实施例中，设备对存储表格树和验证器树的存储单元执行读取和写入。表格树包括父表和子表。验证器树包括与父表相关联的父验证器和与子表相关联的子检验器。父验证器用于验证子表和子检验器。设备存储作为表树的一部分并用于地址转换的安全表树和作为验证器树的一部分的安全验证器树到安全存储单元。所述设备基于在所述存储单元中基于第一子表和第一子检验器计算的验证信息和所述安全验证器树中的第一父验证器来执行验证。

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