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1. 发明申请

US20160119292A1 RE-ENCRYPTION SYSTEM, RE-ENCRYPTION APPARATUS, AND PROGRAM 有权
标题翻译：重新加密系统，重新加密设备和程序
公开(公告)号：US20160119292A1
公开(公告)日：2016-04-28
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： H04L29/06 , 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.
摘要翻译：根据本实施例的重新加密系统包括文件共享装置和重新加密装置。文件共享装置从客户端装置接收到文件请求时，根据该文件请求取得第一加密文件，并向重新加密装置发送包含第一加密文件的重新加密请求。重新加密装置基于重新加密密钥将包含在重新加密请求中的第一加密文件重新加密到第二加密文件，并将第二加密文件发送到文件共享装置。文件共享装置将第二加密文件发送给客户端装置。客户端装置通过基于与该成员的公开密钥对应的私钥对第二加密文件进行解密来取得文件。

2. 发明申请

US20140208117A1 SERVER APPARATUS AND PROGRAM 有权
标题翻译：服务器设备和程序
公开(公告)号：US20140208117A1
公开(公告)日：2014-07-24
申请号：US14219747
申请日：2014-03-19
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： H04L29/06
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，该通知表明应该更新重新加密密钥，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。

3. 发明申请

US20130339726A1 FILE SERVER APPARATUS AND FILE SERVER SYSTEM 审中-公开
标题翻译：文件服务器设备和文件服务器系统
公开(公告)号：US20130339726A1
公开(公告)日：2013-12-19
申请号：US13969033
申请日：2013-08-16
申请人： TOSHIBA SOLUTIONS CORPORATION , KABUSHIKI KAISHA TOSHIBA
发明人： Takuya YOSHIDA , Koji Okada
IPC分类号： H04L29/06
CPC分类号： H04L63/0471 , H04L9/0825 , H04L63/0442 , H04L2209/76
摘要： According to one embodiment, a reception unit receives post-office box's encrypted data, which is obtained by encrypting the data by using a post-office box's public key, from the sending apparatus. A re-encryption key storage unit stores a re-encryption key used for re-encrypting the post-office box's encrypted data into recipient's encrypted data, which is obtained by encrypting the data using a recipient's public key that is different from the post-office box's public key. A re-encryption unit re-encrypts the received post-office box's encrypted data to the recipient's encrypted data using the re-encryption key stored in the re-encryption key storage unit. A transmission unit transmits the re-encrypted recipient's encrypted data to the receiving apparatus.
摘要翻译：根据一个实施例，接收单元从发送装置接收通过使用邮局箱的公开密钥对数据进行加密而得到的邮局箱的加密数据。重新加密密钥存储单元将用于将邮局内加密数据重新加密的重新加密密钥存储到接收者的加密数据中，该加密数据是通过使用与邮局不同的接收者的公钥加密数据而获得的盒子的公钥。重新加密单元使用存储在重新加密密钥存储单元中的重新加密密钥将接收到的邮局盒加密数据重新加密到接收者的加密数据。发送单元将重新加密的接收者的加密数据发送到接收装置。

4. 发明申请

US20140161251A1 KEY MANAGEMENT SYSTEM 有权
标题翻译：关键管理系统
公开(公告)号：US20140161251A1
公开(公告)日：2014-06-12
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： H04L9/08
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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