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21. 发明授权

US06651167B1 Authentication method and system employing secret functions in finite Abelian group 失效
标题翻译：有限Abelian组中使用秘密函数的认证方法和系统
公开(公告)号：US06651167B1
公开(公告)日：2003-11-18
申请号：US09138089
申请日：1998-08-21
申请人： Taro Terao , Kil-ho Shin
发明人： Taro Terao , Kil-ho Shin
IPC分类号： H04L1914
CPC分类号： H04L9/3271 , H04L9/302 , H04L9/3213 , H04L9/3221
摘要： A method and a system for authentication whereby authentication characteristic information is not disclosed to a third party when a verifier uses a verification device of a limited scale to authenticate a user's rights or qualifications. A ticket issuing device interacts with the user's interactive device having a secret function f to calculate document secret information &mgr; based on a document m (data) to be transmitted to the interactive device, whereby the user is issued a ticket t generated from authentication characteristic information x and the document secret information &pgr;. Upon receipt of the document m, the interactive device generates the document secret information using its unique secret function f to perform an interaction based on the generated information. The interaction involves output of a commitment r, input of a challenge c, and an output of a response &sgr;. The user converts the interaction (r, c, &sgr;) into another interaction (r, c, s) using the ticket t to effect Guillou-Quisquater authentication.
摘要翻译：一种用于认证的方法和系统，其中当验证者使用有限规模的验证设备来认证用户的权限或资格时，认证特性信息不向第三方公开。票发行装置与具有秘密功能f的用户的交互式装置进行交互，以基于要发送到交互式装置的文档m（数据）来计算文档秘密信息mu，从而向用户发出从认证特征信息生成的票t x和文件秘密信息pi。在接收到文档m时，交互式设备使用其唯一的秘密功能f生成文档秘密信息，以基于生成的信息执行交互。交互涉及到承诺的输出，挑战的输入c以及响应西格玛的输出。用户使用票证t将交互（r，c，sigma）转换为另一个交互（r，c，s）以实现Guillou-Quisquater身份验证。

22. 发明授权

US06275936B1 Decryption method and device, and access right authentication method and apparatus 有权
标题翻译：解密方法和设备，以及访问权限认证方法和设备
公开(公告)号：US06275936B1
公开(公告)日：2001-08-14
申请号：US09173186
申请日：1998-10-15
申请人： Masaki Kyojima , Rumiko Kakehi , Koji Takeda , Taro Terao
发明人： Masaki Kyojima , Rumiko Kakehi , Koji Takeda , Taro Terao
IPC分类号： G06F124
CPC分类号： G06F21/62 , G06F2221/2103 , G06F2221/2107 , H04L9/302 , H04L9/3218 , H04L9/3271 , H04L2209/04 , H04L2209/127
摘要： A decryption method and device, an access right authentication method and apparatus for securely transmitting specific information to the decryption device while retaining blindness of data that is assigned to be decrypted. An input unit of the decryption device receives a cipher text C′ generated by providing a blind effect to a cipher text C and second decryption information d2 from a user and transmits them to a decryption unit. The decryption unit takes a modulus n and first decryption information d1 from a modulus storage unit and a first decryption information storage unit, respectively. The decryption unit then calculates the expression R=C′d1d2 mod n and outputs R through an output unit. If a combination of a cipher text C and the second decryption information d2 is correct, a correct decryption result is available.
摘要翻译：一种解密方法和装置，用于在保留被分配为被解密的数据的盲目性的同时将特定信息安全地发送到解密装置的访问权限认证方法和装置。解密装置的输入单元从用户接收到对密文C和第二解密信息d2提供盲目生成的密文C'，并将其发送给解密单元。解密单元分别从模数存储单元和第一解密信息存储单元获取模数n和第一解密信息d1。解密单元然后计算表达式R = C'd1d2 mod n，并通过输出单元输出R。如果密文C与第二解密信息d2的组合正确，则可以获得正确的解密结果。

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