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21. 发明公开

EP2947640A1 DATA DECODING DEVICE, ATTRIBUTE-BASED ENCRYPTION SYSTEM, RANDOM NUMBER ELEMENT REMOVING DEVICE, RANDOMIZED SECRET KEY GENERATION DEVICE, DATA DECODING METHOD, AND DATA DECODING PROGRAM 有权
标题翻译：数据解码装置，基于属性的加密系统RAND元素移除设备，设备用于生成的秘密随机密钥数据译码方法和数据解码程序
公开(公告)号：EP2947640A1
公开(公告)日：2015-11-25
申请号：EP13871627.9
申请日：2013-11-01
申请人： Mitsubishi Electric Corporation
发明人： MATSUDA, Nori , HATTORI, Mitsuhiro , ICHIKAWA, Sachihiro , ITO, Takashi , HIRANO, Takato
IPC分类号： G09C1/00
CPC分类号： G06F21/72 , G09C1/00 , H04L9/0869 , H04L9/088 , H04L2209/046
摘要： The object is to enhance the security of encrypted data by dividing a decrypting process of an attribute-based encryption scheme into a plurality of stages and executing the decrypting process. A KEM key partly decrypting part 320 generates an r-KEM key mask value 321 including a random number element, by performing a decrypting process for an encrypted KEM key 313 being a common key encrypted using an attribute conditional expression, using an r-user secret key 221 which is obtained by including the random number element into a user secret key generated in accordance with the attribute-based encryption scheme. A random number element removal requesting part 330 requests an IC card 400 to remove the random number element from the r-KEM key mask value 321, and acquires a KEM key mask value 411 from the IC card 400. A mask removing part 340 generates a KEM key 341 using the KEM key mask value 411. A data decrypting part 350 decrypts an encrypted data main body 312 into target data 301 using the KEM key 341.
摘要翻译：该目的是通过将基于属性的加密方案的解密处理为多个阶段的多个部分并加以执行的解密处理，以提高加密数据的安全性。甲KEM关键部分解密部320生成至r-KEM密钥掩码值321包含随机数元素，通过对加密的KEM键313被利用在属性条件表达式加密的共用密钥，使用在R-用户秘密用于执行解密处理键221的所有其由包含所述随机数元素到雅舞的基于属性的加密方案产生的用户密钥获得。随机数元素移除请求部分330个请求到IC卡400，以除去从R-KEM密钥掩码值321中的随机数元素，和从IC卡400的掩模除去部340基因率获取KEM密钥掩码值411 使用KEM密钥掩码值411的数据解密部350解密加密的数据到主体312成目标数据301使用KEM键第三百四十一KEM密钥341

22. 发明公开

EP2945313A1 KEY GENERATION DEVICE, KEY GENERATION PROGRAM, CONCEALED DATA SEARCH SYSTEM, AND KEY DISTRIBUTION METHOD 有权
标题翻译：密钥生成设备，密钥生成程序SYSTEM FOR LOOKING FOR隐藏的数据与密钥分配方法
公开(公告)号：EP2945313A1
公开(公告)日：2015-11-18
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
CPC分类号： H04L63/0428 , G06F21/602 , G06F21/6227 , G06F2221/2107 , H04L9/3066 , H04L9/3073 , H04L63/0442 , H04L2209/42
摘要： A public parameter PK is key information used in a secret search system 1000 having: a transmission device 100 generating and sending an encryption tag which is an encrypted keyword; a server 200 receiving and storing the encryption tag and conducting a secret search in response to a request for the secret search; and a reception device 300 generating a trapdoor which corresponds to a digital signature of the keyword and as well data requesting the secret search, sending the trapdoor to the server 200, and receiving a search result. The public parameter PK includes a true public parameter PP and a protection key PK'. The transmission device 100 and the reception device 300 require both the public parameter PP and the protection key PK'; however, the server 200 does not require the protection key PK'. Accordingly, the key generation device 300 generates separately the true public parameter PP and the protection key PK' included in the public parameter PK.
摘要翻译：公开参数PK是具有秘密搜索系统1000使用的密钥信息：一个发送设备100生成并发送加密标签所有这些是在加密关键字; 接收和存储所述加密标签并进行响应于对所述秘密搜索请求的搜索秘密的服务器200; 和接收装置300产生对应于该关键字的数字签名和以及数据请求秘密搜索，发送所述活板门到服务器200，并接收搜索结果的活板门。其中，公开参数PK包括一个真正的公共参数PP和保护密钥PK”。发送装置100和接收装置300需要这两个公开参数PP和保护密钥PK“; 但是，服务器200不需要保护密钥PK”。因此，密钥生成装置300基因率分别真实公共参数PP和保护密钥PK“包含在公开参数PK。

23. 发明公开

EP2808803A1 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：EP2808803A1
公开(公告)日：2014-12-03
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
CPC分类号： H04L63/065 , H04L9/30 , H04L9/3073 , H04L2209/42
摘要： A data search server 300 stores a system ciphertext 230 including a data ciphertext and a keyword ciphertext in each category-specific DB unit 391 for each data category, and stores each category-determination secret key 153 being associated with each category-specific DB unit 391. A search request receiving unit 331 receives from a data search terminal a search request including a search trapdoor and an index tag. A data searching unit 332 searches for a category-determination secret key 153 with which the index tag is decrypted to the same value as a key-determination value 191. Using the search trapdoor, the data searching unit 332 performs a search of a Public-key Encryption with Keyword Search scheme on system ciphertexts 230 in a category-specific DB unit 391 associated with this category-determination secret key 153. A search result transmitting unit 333 transmits to the data search terminal 100 a data ciphertext included in a system ciphertext 230 which has been found as a hit in the search.

24. 发明公开

EP2680488A1 SIMILARITY CALCULATION SYSTEM, SIMILARITY CALCULATION DEVICE, COMPUTER PROGRAM, AND SIMILARITY CALCULATION METHOD 审中-公开
标题翻译： ÄHNLICHKEITSBERECHNUNGSSYSTEM，ÄHNLICHKEITSBERECHNUNGSVORRICHTUNG，COMPUTERPROGRAMM UNDÄHNLICHKEITSBERECHNUNGSVERFAHREN
公开(公告)号：EP2680488A1
公开(公告)日：2014-01-01
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
CPC分类号： H04L9/32 , H04L9/008 , H04L9/3073 , H04L9/3231 , H04L2209/34
摘要： Based on an encrypted feature vector C (comparison ciphertext) encrypted with a public key pk of a decryption apparatus and an encrypted feature vector C' (target ciphertext) encrypted with the public key pk of the decryption apparatus, and a random number (temporary key) generated by a random number generation unit 303 (temporary key generation unit), an encrypted random similarity degree calculation unit 314 (interim similarity degree ciphertext calculation unit) performs calculation for calculationg a similarity degree in a first stage, with two encrypted feature vectors C and C' kept encrypted, thereby calculating a second challenge C". The decryption apparatus decrypts the second challenge C^ with a secret key sk of the decryption apparatus, and performs calculation for calculating the similarity degree in a second stage with a result of the decryption kept encrypted with the temporary key, thereby calculating a second response Z. A plaintext similarity degree extraction unit 315 (similarity degree calculation unit) decrypts the second response Z with the temporary key, thereby calculating a similarity degree d.
摘要翻译：基于用解密装置的公钥pk加密的加密特征向量C（比较密文）和用解密装置的公开密钥pk加密的加密特征向量C'（目标密文）和随机数（临时密钥），加密随机相似度计算单元314（临时相似度密文计算单元）执行计算第一阶段中的相似度的计算，具有两个加密的特征向量C（临时密钥生成单元）并且C'保持加密，从而计算第二挑战C“，解密装置用解密装置的秘密密钥sk解密第二询问C ^，并且进行用于计算第二阶段的相似度的计算，结果为使用临时密钥进行加密的解密，从而计算第二响应Z.明文相似度提取单元315 （相似度计算单元）用临时密钥解密第二响应Z，从而计算相似度d。

25. 发明公开

EP2667538A1 ENCRYPTION SYSTEM, ENCRYPTION PROCESSING METHOD FOR ENCRYPTION SYSTEM, ENCRYPTION DEVICE, ENCRYPTION PROGRAM, DECRYPTION DEVICE, DECRYPTION PROGRAM, SETUP DEVICE, SETUP PROGRAM, KEY GENERATION DEVICE, KEY GENERATION PROGRAM, KEY ASSIGNMENT DEVICE AND KEY ASSIGNMENT PROGRAM 审中-公开
标题翻译：加密系统加密处理加密系统，加密设备，加密程序，解码装置，解码程序设置设备，设置程序密钥生成设备，密钥生成程序的关键字分配设备和钥匙配置方案
公开(公告)号：EP2667538A1
公开(公告)日：2013-11-27
申请号：EP11856496.2
申请日：2011-01-18
申请人： Mitsubishi Electric Corporation
发明人： HATTORI, Mitsuhiro , HIRANO, Takato , MORI, Takumi , ITO, Takashi , MATSUDA, Nori , SAKAGAMI, Tsutomu
IPC分类号： H04L9/08
CPC分类号： H04L9/3006 , H04L9/0836 , H04L9/0847 , H04L9/3073 , H04L2209/42
摘要： In a wildcard-applicable anonymous hierarchical identity-based encryption system, it is aimed to make the number of pairing operations a fixed number. A user identifier ID and a pattern P are used. The user identifier ID includes k number of hierarchy identifiers. The pattern P includes either of a hierarchy identifier, a wildcard value and a blank value for each hierarchy. An encryption device 400 extracts a key value H corresponding to a hierarchy of the wildcard value and a key value H corresponding to a hierarchy of a pattern value from a public key PK, calculates a cipher value C 1 and a cipher value C 3 , and outputs ciphertext data CT including plaintext cipher value C 0 , the cipher value C 1 , and the cipher value C 3 . A decryption device 300 extracts the hierarchy identifier of the hierarchy corresponding to the wildcard value from the user identifier ID, decrypts the plaintext cipher value C 0 included in the ciphertext data CT using the extracted hierarchy identifier, the cipher value C 1 and the cipher value C 3 which are included in the ciphertext data CT, and outputs plaintext data M.
摘要翻译：在通配符适用匿名基于分层身份的加密系统，它的目的是使配对操作的固定数目。用户标识符ID和图案P被使用。用户识别符ID包含层次结构的标识符的k个。图案P包括一层级标识符，通配符值和每个层级中的空白值的任一。加密装置400中提取的关键值H对应于通配符值和密钥值H对应于从公开密钥PK的图案值的层次结构的层次结构，计算一个密码值C 1和一个密码值C 3，和输出密文数据CT包括明文的密码值C 0，的密码值C 1，并且密码值C第三一种解密装置300所提取的层次对应于从用户标识符ID通配符值的层级标识符，解密使用提取的层级标识符，密码值C 1和中的密码值的明文的密码值C 0包括在密文数据CT 的C 3被包括在密文CT的数据，并输出明文数据M.

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