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1. 发明授权

EP2680488B1 SIMILARITY CALCULATION SYSTEM, SIMILARITY CALCULATION DEVICE, COMPUTER PROGRAM, AND SIMILARITY CALCULATION METHOD 有权
公开(公告)号：EP2680488B1
公开(公告)日：2019-08-21
申请号：EP11859252.6
申请日：2011-02-22
申请人： Mitsubishi Electric Corporation
发明人： HIRANO, Takato , MATSUDA, Nori , ITO, Takashi , HATTORI, Mitsuhiro , MORI, Takumi
IPC分类号： H04L9/32 , H04L9/30

2. 发明公开

EP3500971A1 DATA DISTURBANCE DEVICE AND DATA DISTURBANCE SYSTEM 有权
公开(公告)号：EP3500971A1
公开(公告)日：2019-06-26
申请号：EP16779237.3
申请日：2016-09-22
申请人： Mitsubishi Electric Corporation
发明人： HATTORI, Mitsuhiro , SHIMIZU, Rina , HIRANO, Takato , MATSUDA, Nori , WANG, Ye
IPC分类号： G06F21/62 , H04L29/06
摘要： This invention is concerning a data disturbance device capable of protecting privacy according to the needs of each individual while maintaining data usability. The data disturbance device has a disturbance object setting unit that calculates a disturbance parameter necessary to disturb information, which is set as information to be disturbed, out of items of information contained in acquired data, and a data disturbance unit that generates disturbed data by irreversibly converting the acquired data using the disturbance parameter.

3. 发明授权

EP2945313B1 KEY GENERATION DEVICE, KEY GENERATION PROGRAM, CONCEALED DATA SEARCH SYSTEM, AND KEY DISTRIBUTION METHOD 有权
标题翻译：密钥生成装置，密钥生成程序，隐藏数据搜索系统和密钥分发方法
公开(公告)号：EP2945313B1
公开(公告)日：2017-09-06
申请号：EP13870780.7
申请日：2013-01-12
申请人： Mitsubishi Electric Corporation
发明人： HATTORI, Mitsuhiro , HIRANO, Takato , ITO, Takashi , MATSUDA, Nori
IPC分类号： H04L9/30 , G06F17/30 , G06F21/62 , G06F21/60
CPC分类号： H04L63/0428 , G06F21/602 , G06F21/6227 , G06F2221/2107 , H04L9/3066 , H04L9/3073 , H04L63/0442 , H04L2209/42

4. 发明公开

EP2787681A1 DATA PROCESSING DEVICE, DATA PROCESSING METHOD, AND PROGRAM 有权
标题翻译： DATENVERARBEITUNGSVORRICHTUNG，DATENVERARBEITUNGSVERFAHREN UND PROGRAMM
公开(公告)号：EP2787681A1
公开(公告)日：2014-10-08
申请号：EP11876549.4
申请日：2011-11-30
申请人： Mitsubishi Electric Corporation
发明人： HATTORI, Mitsuhiro , HIRANO, Takato , MORI, Takumi , ITO, Takashi , MATSUDA, Nori
IPC分类号： H04L9/30 , G09C1/00
CPC分类号： H04L9/30 , H04L9/008 , H04L9/0869 , H04L9/3073 , H04L2209/56
摘要： A storage part 301 stores a public key generated based on a doubly homomorphic encryption algorithm and data encrypted by using the public key as a template to be used for authentication. A random number generating part 203 generates a random number using at least a part of the public key in the storage part 301. A template updating part 307 performs an arithmetic operation using the random number generated by the random number generating part 305 and updates the template. The storage part 301 stores the updated template by overwriting the template before being updated.
摘要翻译：存储部301存储基于双同形加密算法生成的公开密钥和使用公开密钥加密的数据作为用于认证的模板。随机数生成部203使用存储部301中的公开密钥的至少一部分来生成随机数。模板更新部307使用由随机数生成部305生成的随机数进行算术运算，并更新模板。存储部分301通过在更新之前覆盖模板来存储更新的模板。

5. 发明公开

EP2495908A1 DATA PROCESSING DEVICE 审中-公开
标题翻译： DATENVERARBEITUNGSGERÄT
公开(公告)号：EP2495908A1
公开(公告)日：2012-09-05
申请号：EP09850835.1
申请日：2009-10-29
申请人： Mitsubishi Electric Corporation
发明人： HATTORI, Mitsuhiro , SHIBATA, Yoichi , ITO, Takashi , MATSUDA, Nori , TAKASHIMA, Katsuyuki , YONEDA, Takeshi
IPC分类号： H04L9/32
CPC分类号： H04L9/3073 , H04L9/008 , H04L9/3231
摘要： A certification device 101 1 encrypts a feature vector for registration by using a random number and a public key which is set to correspond to a secret key in a decryption device 103. The encrypted feature vector for registration is registered in an authentication device 102. In authentication, the certification device encrypts a feature vector for authentication by using the public key and a random number. With the two encrypted feature vectors being kept encrypted, the authentication device generates encrypted similarity degree information from which the decryption device can derive the similarity degree between the two feature vectors by a decryption process using the secret key. The decryption device 103 decrypts the encrypted similarity degree information to derive the similarity degree of the plaintext. The authentication device 102, if the similarity degree is equal to or larger than a threshold, determines that the user is the correct user. The similarity degree can be derived without using the feature vector of the plaintext. Thus, secure identity authentication with a lower possibility of plaintext theft can be realized.
摘要翻译：认证装置101 1通过使用被设置为对应于解密装置103中的秘密密钥的随机数和公钥来加密用于注册的特征向量。用于注册的加密特征向量被登记在认证装置102中。验证设备通过使用公钥和随机数加密特征向量进行认证。在两个加密特征向量保持加密的情况下，认证装置生成加密的相似度信息，解密装置可以通过使用秘密密钥的解密处理从两个特征向量之间导出相似度。解密装置103对加密的相似度信息进行解密，得到明文的相似度。认证装置102如果相似度等于或大于阈值，则确定用户是正确的用户。可以在不使用明文的特征向量的情况下导出相似度。因此，可以实现具有较低的明文盗窃可能性的安全身份认证。

6. 发明授权

EP3500971B1 DATA DISTURBANCE DEVICE AND DATA DISTURBANCE SYSTEM 有权
公开(公告)号：EP3500971B1
公开(公告)日：2019-12-25
申请号：EP16779237.3
申请日：2016-09-22
申请人： Mitsubishi Electric Corporation
发明人： HATTORI, Mitsuhiro , SHIMIZU, Rina , HIRANO, Takato , MATSUDA, Nori , WANG, Ye
IPC分类号： G06F21/62 , H04L29/06

7. 发明授权

EP2808803B1 DATA SEARCH DEVICE, DATA SEARCH METHOD, DATA SEARCH PROGRAM, DATA REGISTRATION DEVICE, DATA REGISTRATION METHOD, DATA REGISTRATION PROGRAM AND INFORMATION PROCESSING DEVICE 有权
标题翻译：数据搜索设备，数据搜索方法，数据搜索程序登记数据设备，数据记录处理，数据登记程序及信息处理设备
公开(公告)号：EP2808803B1
公开(公告)日：2017-03-01
申请号：EP12866425.7
申请日：2012-01-25
申请人： Mitsubishi Electric Corporation
发明人： HATTORI, Mitsuhiro , MATSUDA, Nori , ITO, Takashi , MORI, Takumi , HIRANO, Takato
IPC分类号： G06F17/30 , H04L9/30 , H04L29/06
CPC分类号： H04L63/065 , H04L9/30 , H04L9/3073 , H04L2209/42

8. 发明授权

EP2787681B1 DATA PROCESSING DEVICE, DATA PROCESSING METHOD, AND PROGRAM 有权
标题翻译：数据处理装置，数据处理方法和程序
公开(公告)号：EP2787681B1
公开(公告)日：2016-10-12
申请号：EP11876549.4
申请日：2011-11-30
申请人： Mitsubishi Electric Corporation
发明人： HATTORI, Mitsuhiro , HIRANO, Takato , MORI, Takumi , ITO, Takashi , MATSUDA, Nori
IPC分类号： H04L9/30 , G09C1/00
CPC分类号： H04L9/30 , H04L9/008 , H04L9/0869 , H04L9/3073 , H04L2209/56

9. 发明公开

EP2525339A1 SECRET RETRIEVAL SYSTEM, PUBLIC PARAMETER GENERATION DEVICE, ENCRYPTION DEVICE, USER SECRET KEY GENERATION DEVICE, QUERY ISSUE DEVICE, RETRIEVAL DEVICE, COMPUTER PROGRAM, SECRET RETRIEVAL METHOD, PUBLIC PARAMETER GENERATION METHOD, ENCRYPTION METHOD, USER SECRET KEY GENERATION METHOD, QUERY ISSUE METHOD, AND RETRIEVAL METHOD 审中-公开
标题翻译： GEHEIMABRUFSYSTEM UND ABRUFVERFAHREN
公开(公告)号：EP2525339A1
公开(公告)日：2012-11-21
申请号：EP10843027.3
申请日：2010-01-13
申请人： Mitsubishi Electric Corporation
发明人： HATTORI, Mitsuhiro , MORI, Takumi , ITO, Takashi , MATSUDA, Nori , TAKASHIMA, Katsuyuki , YONEDA, Takeshi
IPC分类号： G09C1/00 , G06F17/30 , G06F21/24
CPC分类号： G06F21/6227 , G06F21/72 , G06F2221/2107 , G06F2221/2117 , G06F2221/2145 , H04L9/3073
摘要： In a secure search system to be used by a plurality of users, the size of a ciphertext is reduced and the need to generate a new ciphertext when a new user is added is eliminated. A public parameter generation device 100 generates a pair of a public parameter and a master secret key. Using the public parameter, an encryption device 400 encrypts a keyword and generates a ciphertext. Using the master secret key, a user secret key generation device 200 generates a user secret key of a query issuing device 300. Using the user secret key, the query issuing device 300 generates a query for searching for the keyword. Based on the ciphertext and the query, a search device 500 determines whether a hit is obtained for searching.
摘要翻译：在多个用户使用的安全搜索系统中，减少了密文的大小，并且消除了添加新用户时生成新密文的需要。公共参数生成装置100生成一对公共参数和主秘密密钥。使用公共参数，加密装置400加密关键字并生成密文。使用主秘密密钥，用户密钥生成装置200生成查询发布装置300的用户密钥。使用用户密钥，查询发布装置300生成用于搜索关键字的查询。基于密文和查询，搜索装置500确定是否获得用于搜索的命中。

10. 发明授权

EP2525340B1 CONFIDENTIAL SEARCH SYSTEM AND ENCRYPTION PROCESSING SYSTEM 有权
公开(公告)号：EP2525340B1
公开(公告)日：2018-06-06
申请号：EP10843046.3
申请日：2010-01-15
申请人： Mitsubishi Electric Corporation
发明人： MATSUDA, Nori , HATTORI, Mitsuhiro , ITO, Takashi , YONEDA, Takeshi
IPC分类号： G09C1/00 , G06F17/30 , H04L9/08 , H04L9/30 , H04L9/00 , H04L9/32 , G06F21/62
CPC分类号： H04L9/3263 , G06F21/6245 , H04L9/008 , H04L9/083 , H04L9/088 , H04L9/3073 , H04L9/3093 , H04L2209/42
摘要： The object is to realize confidential search that can flexibly control searchable data depending on a role or authority of a user when the data is shared in a group. When the inner product of an attribute vector and a predicate vector is a predetermined value, a confidential search system 100 conducts pairing computation of decrypted data generated based on the attribute vector and a decryption key generated based on the predicate vector, so as to realize confidential search by utilizing an inner-product predicate encryption process that can decrypt the encrypted data. In particular, the confidential search system 100 enables flexible control of searchable data depending on the role or authority of the user, by devising a method of generating the attribute vector and the predicate vector.

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