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1. 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。

2. 发明公开

EP3605360A1 SEARCH DEVICE, SEARCH SYSTEM, SEARCH METHOD, AND SEARCH PROGRAM 审中-公开
公开(公告)号：EP3605360A1
公开(公告)日：2020-02-05
申请号：EP17907937.1
申请日：2017-04-25
申请人： Mitsubishi Electric Corporation
发明人： SHIBATA, Yoichi , KOSEKI, Yoshihiro
IPC分类号： G06F17/30
摘要： A search device (300) transmits a search condition to a management device (400) that manages a numerical value which is a number sequence of one or more digits, based on a digit-by-digit correspondence between a number of each digit of the numerical value and a digit representation which is a symbol representing a digit. A grouping unit performs grouping on a plurality of search-target numerical values to be searched for, each of which is a number sequence of one or more digits, on a basis of commonality of the number of digits and commonality of a number sequence from a most significant digit, so as to generate one or more numerical value groups. A search condition generation unit generates, for each numerical value group, a search condition element by establishing a correspondence between a number of each digit of a sequence common range, which is a range of a number sequence common to search-target numerical values included in each numerical value group, and the digit representation of each digit of the sequence common range, and generates the search condition by integrating the search condition element of each numerical value group. A transmission unit (305) transmits the search condition generated by the search condition generation unit to the management device (400).

3. 发明授权

EP2611062B1 ENCRYPTION DEVICE, ENCRYPTION SYSTEM, ENCRYPTION METHOD AND ENCRYPTION PROGRAM 失效
公开(公告)号：EP2611062B1
公开(公告)日：2018-07-18
申请号：EP10856396.6
申请日：2010-08-24
申请人： Mitsubishi Electric Corporation
发明人： SHIBATA, Yoichi , TSUJI, Hirosato , MATSUI, Mitsuru
IPC分类号： H04L9/14 , H04L9/06 , H04L9/16
CPC分类号： H04L9/06 , H04L9/0618 , H04L9/0656 , H04L9/16
摘要： The object is to enable cipher communication even when a cipher key in a one-time pad cipher (Vemam cipher) is running short. A one-time pad encrypting part encrypts communication data by the one-time pad cipher by sequentially using part of a one-time pad cipher key stored in a one-time pad cipher key storage part, to generate encrypted data. A block-encrypting part encrypts communication data by a block cipher by using a block-cipher key stored in a block-cipher key storage part, to generate encrypted data. An encryption control part controls whether the communication data is to be encrypted by the one-time pad encrypting part, or by the block-encrypting part, depending on a remaining bit count of the one-time pad cipher key stored in the one-time pad cipher key storage part.

4. 发明公开

EP2611061A1 COMMUNICATION TERMINAL, COMMUNICATION SYSTEM, COMMUNICATION METHOD AND COMMUNICATION PROGRAM 审中-公开
标题翻译： KOMMUNIKATIONSENDGERÄT，KOMMUNIKATIONSSYSTEM，KOMMUNIKATIONSVERFAHREN UND KOMMUNIKATIONSPROGRAMM
公开(公告)号：EP2611061A1
公开(公告)日：2013-07-03
申请号：EP10856395.8
申请日：2010-08-24
申请人： Mitsubishi Electric Corporation
发明人： TSUJI, Hirosato , SHIBATA, Yoichi
IPC分类号： H04L9/14
CPC分类号： H04L9/08 , H04L9/0656 , H04L9/0816 , H04L9/0852 , H04L2209/80 , H04W12/02
摘要： The object is to adjust which section of a one-time pad cipher key is used and achieve cipher communication when there is a possibility that the one-time pad cipher keys are not completely matched between communication terminals. A cipher key transfer device 102 acquires a one-time pad cipher key 111 from a key sharing system 101, divides the acquired one-time pad cipher key 111 with a predetermined number of bits, and transfers the same to a mobile communication terminal 103 after converting the same into one-time pad cipher key cartridges 112. Along with the partner's terminal, the mobile communication terminal 103 negotiates which one-time pad cipher key cartridge 112 will be used to perform cipher communication, decides the one-time pad cipher key cartridge 112 to be used, and begins cipher communication.
摘要翻译：目的是调整一次性密码密码的哪个部分被使用，并且当存在通信终端之间的一次性密码密码密钥不完全匹配的可能性时，实现密码通信。加密密钥传送装置102从密钥共享系统101获取一次性密码密码111，将所获取的一次性密码密码111按预定位数进行划分，并将其传送到移动通信终端103之后将其转换为一次性密码密钥盒112.与伙伴的终端一起，移动通信终端103协商将使用哪一个一次性密码密钥卡盒112来执行密码通信，决定一次性密码密码密钥盒112，并开始密码通信。

5. 发明公开

EP2738975A1 ENCRYPTION DEVICE, ENCRYPTION METHOD AND ENCRYPTION PROGRAM 审中-公开
标题翻译： VERSCHLÜSSELUNGSVORRICHTUNG，VERSCHLÜSSELUNGSVERFAHRENUNDVERSCHLÜSSELUNGSPROGRAMM
公开(公告)号：EP2738975A1
公开(公告)日：2014-06-04
申请号：EP11869972.7
申请日：2011-07-25
申请人： Mitsubishi Electric Corporation
发明人： SHIBATA, Yoichi
IPC分类号： H04L9/14 , G09C1/00 , H04L9/20
CPC分类号： H04L9/0819 , G10L19/22 , G10L19/24 , H04L9/0656 , H04L9/0852 , H04L9/0863 , H04L9/16
摘要： It is an object, when voice or image data or the like being encoded is encrypted using a one-time pad (OTP) cipher and then transmitted, to reduce a period of time in which a cipher key for the OTP cipher runs out. A terminal device A 102 determines whether to encode transmission data by an encoding scheme A or an encoding scheme B having a lower bit rate than the encoding scheme A, depending on the number of remaining bits of an OTP cipher key 401, and encodes the transmission data according to the determined encoding scheme, thereby generating encoded data. The terminal device A 102 encrypts the generated encoded data with the OTP cipher using the OTP cipher key, thereby generating encrypted communication data 405, and transmits the generated encrypted communication data 405 to a terminal device B 103.
摘要翻译：目的在于，使用一次性密码（OTP）密码对已编码的声音或图像数据等进行加密，然后发送，以减少OTP密码的密码用尽的时间。终端设备A 102根据OTP密码密钥401的剩余比特数来确定是否通过编码方案A或具有比编码方式A的比特率低的编码方式B对发送数据进行编码，并对发送数据，从而生成编码数据。终端装置A102使用OTP密码密钥，利用OTP密码对生成的编码数据进行加密，从而生成加密通信数据405，并将生成的加密通信数据405发送到终端装置B103。

6. 发明公开

EP2611062A1 ENCRYPTION DEVICE, ENCRYPTION SYSTEM, ENCRYPTION METHOD AND ENCRYPTION PROGRAM 失效
标题翻译： VERSCHLÜSSELUNGSVORRICHTUNG，VERSCHLÜSSELUNGSSYSTEM，VERSCHLÜSSELUNGSVERFAHRENUNDVERSCHLÜSSELUNGSPROGRAMM
公开(公告)号：EP2611062A1
公开(公告)日：2013-07-03
申请号：EP10856396.6
申请日：2010-08-24
申请人： Mitsubishi Electric Corporation
发明人： SHIBATA, Yoichi , TSUJI, Hirosato , MATSUI, Mitsuru
IPC分类号： H04L9/14
CPC分类号： H04L9/28 , H04L9/06 , H04L9/0618 , H04L9/0656 , H04L9/16
摘要： The object is to enable cipher communication even when a cipher key in a one-time pad cipher (Vemam cipher) is running short. A one-time pad encrypting part encrypts communication data by the one-time pad cipher by sequentially using part of a one-time pad cipher key stored in a one-time pad cipher key storage part, to generate encrypted data. A block-encrypting part encrypts communication data by a block cipher by using a block-cipher key stored in a block-cipher key storage part, to generate encrypted data. An encryption control part controls whether the communication data is to be encrypted by the one-time pad encrypting part, or by the block-encrypting part, depending on a remaining bit count of the one-time pad cipher key stored in the one-time pad cipher key storage part.
摘要翻译：即使在一次性密码（Vemam cipher）中的密码密码短的情况下，也可以进行密码通信。一次性加密部分通过依次使用存储在一次性加密密钥存储部分中的一次性密码密码密钥的一部分来加密通过一次性加密密码的通信数据来生成加密数据。块加密部分通过使用存储在块密码密钥存储部分中的块密码密钥通过块密码加密通信数据，以生成加密数据。加密控制部分根据一次存储的一次性加密密码密钥的剩余比特数来控制一次性加密部分是加密通信数据还是由块加密部分垫密码存储部分。

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