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公开(公告)号：US20140281569A1
公开(公告)日：2014-09-18
申请号：US14290054
申请日：2014-05-29
Applicant: Hitachi, Ltd.
Inventor： Kenta TAKAHASHI
IPC: H04L29/06
CPC classification number: H04L63/0861 , G06F21/32
Abstract: A biometric authentication method for a computer system, the computer system comprising: a computer; and an authentication server, the biometric authentication method including steps of: extracting a first feature from the captured biometric information; generating a template polynomial for enrollment; extracting a second feature from the captured biometric information; generating a template polynomial for authentication; generating a correlation function for calculating a correlation between the template polynomial for authentication and the enrolled template polynomial; calculating a correlation value between the template polynomial for authentication and the enrolled template polynomial by using the generated correlation function, and determining based on the calculated correlation value whether or not the biometric information at the time of authentication coincides with the biometric information enrolled.
Abstract translation: 一种用于计算机系统的生物特征认证方法，所述计算机系统包括：计算机; 以及认证服务器，所述生物体认证方法包括以下步骤：从所捕获的生物体信息中提取第一特征; 生成用于注册的模板多项式; 从所捕获的生物特征信息中提取第二特征; 生成用于认证的模板多项式; 生成用于计算用于认证的模板多项式与所登记的模板多项式之间的相关性的相关函数; 通过使用所生成的相关函数计算用于认证的模板多项式与所登记的模板多项式之间的相关值，以及基于所计算的相关值，确定在认证时的生物特征信息是否与登记的生物特征信息一致。
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公开(公告)号：US20250068971A1
公开(公告)日：2025-02-27
申请号：US18723555
申请日：2022-08-12
Applicant: Hitachi, Ltd.
Inventor： Yosuke KAGA , Kenta TAKAHASHI , Wataru NAKAMURA , Yusei SUZUKI
Abstract: A machine learning system includes: a server holding a common model; and a plurality of clients each holding concealment target data and an individual model, the server transmits the common model to the plurality of clients, each of the plurality of clients: generates a learning result obtained by updating the common model based on the concealment target data and the individual model held by itself; and transmits the generated learning result to the server, and the server updates the common model based on the received learning result.
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3.发明申请公开(公告)号：US20220391518A1
公开(公告)日：2022-12-08
申请号：US17832103
申请日：2022-06-03
Applicant: Hitachi, Ltd.
Inventor： Yukie MOTOMIYA , Takayuki HABUCHI , Kenta TAKAHASHI , Ken NAGANUMA , Non KAWANA
Abstract: A first computer, in data registration processing: determines a type of biometric information for encryption with which the data is to be encrypted; acquires the determined type of biometric information for encryption from a user of the first computer; generates, from each piece of the acquired biometric information for encryption, a public key based on a predetermined algorithm; transmits the public key to a second computer; and transmits the data encrypted with the public key to the third computer, the first computer, in data presentation processing: acquires the encrypted data from a third computer; acquires the determined type of biometric information for decryption from the user of the first computer; generates, from each piece of the acquired biometric information for decryption, a private key based on the predetermined algorithm; decrypts the encrypted data with use of the private key; and presents each piece of the decrypted registered data.
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公开(公告)号：US20190042716A1
公开(公告)日：2019-02-07
申请号：US15758765
申请日：2016-06-23
Applicant: Hitachi, Ltd.
Inventor： Yosuke KAGA , Masakazu FUJIO , Kenta TAKAHASHI
IPC: G06F21/32
Abstract: This biometric signature system comprises: a biometric certificate storage module that stores a biometric certificate generated on the basis of a user's biometric information; a biometric information acquisition module that acquires new biometric information from the user; a biometric certificate generation module that generates a new biometric certificate on the basis of the new biometric information; a biometric signature generation module that assigns a biometric signature to the new biometric certificate on the basis of the new biometric information; a biometric signature verification module that verifies the biometric signature using the biometric certificate stored in the biometric certificate storage module; and a biometric certificate registration module that registers the new biometric certificate in the biometric certificate storage module if verification of the biometric signature was successful.
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5.发明申请公开(公告)号：US20140019766A1
公开(公告)日：2014-01-16
申请号：US13938624
申请日：2013-07-10
Applicant: HITACHI, LTD.
Inventor： Kenta TAKAHASHI , Masakatsu NISHIGAKI , Yuta YONEYAMA , Eisei HONBU
IPC: H04L9/32
CPC classification number: H04L9/3281 , G06F21/34 , G06F21/64 , H04L9/006 , H04L9/3231 , H04L9/3247 , H04L9/3263
Abstract: A signature generation and verification system including a signature generation apparatus and a signature verification apparatus is provided. Based on signer certification information possessed by a signer, the signature generation apparatus generates a digital signature and verification data corresponding to a given electronic document and outputs the set of the digital signature and the verification data as signature data. Upon receipt of the electronic document and the signature data, the signature verification apparatus verifies the digital signature using the verification data to verify the integrity of the electronic document. As needed, the signature verification apparatus performs user identification ex-post facto by authenticating that the signer certification information from which the verification data was generated belongs to a legitimate user without knowledge of the signer certification information.
Abstract translation: 提供了包括签名生成装置和签名验证装置的签名生成和验证系统。 签名生成装置根据签名人拥有的签名者认证信息，生成与给定的电子文档对应的数字签名和验证数据，作为签名数据输出该数字签名和验证数据。 在接收到电子文档和签名数据之后，签名验证装置使用验证数据验证数字签名，以验证电子文档的完整性。 根据需要，签名验证装置通过在不知道签名者认证信息的情况下认证生成验证数据的签名者认证信息属于合法用户，从而事后进行用户识别。
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Patent Agency Ranking
公开(公告)号：US20230419108A1
公开(公告)日：2023-12-28
申请号：US18117552
申请日：2023-03-06
Applicant: Hitachi, Ltd.
Inventor： Yusei SUZUKI , Yosuke KAGA , Kenta TAKAHASHI , Masakazu FUJIO
CPC classification number: G06N3/08 , G06N3/045 , H04L9/0863 , G06F21/32
Abstract: A training server classifies a common model and an individual model transmitted from a plurality of client devices on the basis of the individual model transmitted from a training data management server, and updates the common model and the individual model in accordance with a classification result.
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公开(公告)号：US20230253175A1
公开(公告)日：2023-08-10
申请号：US18015554
申请日：2021-04-13
Applicant: Hitachi, Ltd.
Inventor： Kenta TAKAHASHI , Satoru OKURA , Yuki ITO , Kohei YAMADA
IPC: H01J37/04 , H01J37/147 , A61N5/10
CPC classification number: H01J37/045 , H01J37/1474 , A61N5/1067 , A61N5/1071 , H01J2237/24507 , H01J2237/0473 , A61N2005/1087
Abstract: In a particle beam irradiation system, upon receipt of a signal to stop irradiation of a charged particle beam, the signal outputted from a scanning controller, an accelerator and transport system controller stops emission of the charged particle beam from a charged particle beam generation unit to the irradiation unit, the scanning controller determines, according to an irradiation dose of the charged particle beam at one of a plurality of spots that has been irradiated with the charged particle beam until immediately before the accelerator and transport system controller stops the emission, the irradiation dose measured by the irradiation dose monitor from when the signal to stop the irradiation is outputted, whether or not to skip the irradiation of the charged particle beam at another one of the plurality of spots subsequent to the one of the plurality of spots, so as to control the accelerator and transport system controller.
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公开(公告)号：US20200014540A1
公开(公告)日：2020-01-09
申请号：US16491129
申请日：2018-02-14
Applicant: Hitachi, Ltd.
Inventor： Yosuke KAGA , Kenta TAKAHASHI , Masakazu FUJIO
Abstract: A biometric signature system holds a first template indicating a result of transforming, by predetermined transformation, first biometric information acquired from a predetermined part of a user; and a second template indicating a result of transforming, by predetermined one-way transformation, second biometric information acquired from the predetermined part of the user, identifies a parameter for which a similarity between the first template of the person to be authenticated corrected, generates a second template of the person to be authenticated from each piece of corrected second biometric information, and determines whether authentication of the person to be authenticated is successful by comparing each generated second template with the second template.
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9.发明申请BIOMETRIC SIGNATURE SYSTEM, SIGNATURE VERIFICATION METHOD, REGISTRATION TERMINAL, SIGNATURE GENERATION TERMINAL, AND SIGNATURE VERIFICATION DEVICE 审中-公开生物特征签名系统，签名验证方法，注册终端，签名生成终端和签名验证设备公开(公告)号：US20160094348A1
公开(公告)日：2016-03-31
申请号：US14892413
申请日：2013-05-28
Applicant: HITACHI, LTD.
Inventor： Kenta TAKAHASHI
CPC classification number: H04L9/3247 , H04L9/0866 , H04L9/3218 , H04L9/3231 , H04L9/3263 , H04L2209/30 , H04L2209/34
Abstract: A biometric signature system generates a digital signature for electronic documents using biometric information as a secret key. Registration commitment information is generated by performing expansion conversion on a predetermined secret key and embedding the resulting secret key in feature data of biometric information of a user, and a set with a corresponding public key. A pair of one-time secret and public keys is generated for digital signature feature data of the biometric information of the user, and a digital signature for a message is generated using the one-time secret key. A digital signature commitment is generated and a set of the one-time public key and the digital signature is output as the biometric digital signature. The digital signature is verified using the one-time public key. A differential secret key is calculated and a correspondence of the differential secret key, the one-time public key and the public key is verified.
Abstract translation: 生物识别签名系统使用生物特征信息作为密钥生成电子文档的数字签名。 通过对预定的秘密密钥执行扩展转换并将生成的秘密密钥嵌入到用户的生物体信息的特征数据中以及具有对应的公共密钥的集合来生成注册承诺信息。 为用户的生物体信息的数字签名特征数据生成一对一次秘密和公开密钥，并且使用一次性密钥生成消息的数字签名。 生成数字签名承诺，并且输出一组一次性公钥和数字签名作为生物特征数字签名。 使用一次性公钥验证数字签名。 计算差分秘密密钥，并验证差分秘密密钥，一次性公共密钥和公开密钥的对应关系。
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公开(公告)号：US20220405369A1
公开(公告)日：2022-12-22
申请号：US17779202
申请日：2020-09-18
Applicant: Hitachi, Ltd.
Inventor： Kenta TAKAHASHI
Abstract: A key generation apparatus for accomplishing high precision authentication in biometric encryption and biometric signing based on feature vectors in a high-dimensional Euclidean space, the apparatus: holds a first feature vector indicating a feature of first biometric information, and a parameter for identifying one arrangement out of a sphere packing arrangement with a density less than 1 and more than a predetermined value, or a sphere covering arrangement with a density equal to or more than 1 and less than a predetermined value, identifies one arrangement out of the sphere packing arrangement or the sphere covering arrangement based on the parameter; selects a first point included in the identified one arrangement; generates a first key by predetermined first conversion on the first point; and generates, based on the first feature vector and the first point, a template associated with the first biometric information.
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