公开(公告)号：US20230327876A1

公开(公告)日：2023-10-12

申请号：US18044423

申请日：2021-08-23

Applicant: Hitachi, Ltd.

Inventor： Yosuke KAGA ,  Kenta TAKAHASHI ,  Masakazu FUJIO ,  Wataru NAKAMURA ,  Yoshiko YASUMURA

IPC: H04L9/32 ,  H04L9/08

CPC classification number: H04L9/3231 ,  H04L9/0866

Abstract: An authentication apparatus holds: a combination of a concealment template generated from a secret key and biometric information through use of biometric cryptography and encrypted identity verification information obtained by encrypting identity verification information through use of the secret key; and biometric information on a user, and is configured to: extract the secret key from the concealment template through use of the biometric information on the user; acquire the identity verification information by decrypting the encrypted identity verification information through use of the extracted secret key; and verify identity of the user based on the acquired identity verification information.

公开(公告)号：US20140045162A1

公开(公告)日：2014-02-13

申请号：US13926077

申请日：2013-06-25

Applicant: Hitachi. Ltd.

Inventor： Haru ANDO ,  Ryuji MINE ,  Masakazu FUJIO

IPC: G09B5/00

CPC classification number: G09B5/00 ,  G09B7/02

Abstract: A device of structuring learning contents includes a lesson state data acquisition unit acquiring data of a state of a lesson given by displaying the learning content using an electronic blackboard and a server connected to the electronic blackboard, the lesson state data acquisition unit and a database through a network, in which the server has a lesson state data analysis unit extracting a feature amount of the lesson from the lesson state data, a type classification unit analyzing the feature amount of the lesson and classifying the lesson as a lesson type and an attitude type, a content evaluation unit evaluating the learning content from the feature amount of the lesson, and a content-tag data generation unit giving a content tag including content tag data based on the analysis/evaluation result to the learning content to structure the learning contents.

Abstract translation: 构造学习内容的装置包括：课程状态数据获取单元，其通过使用电子黑板和连接到电子黑板的服务器，课程状态数据获取单元和数据库通过显示学习内容而获得的课程状态的数据 网络，其中服务器具有课堂状态数据分析单元从课次状态数据中提取课程的特征量;类型分类单元，用于分析课程的特征量并将课程分类为课程类型和姿态类型 内容评价单元，根据该课程的特征量对学习内容进行评价;以及内容标签数据生成单元，将包含基于分析评价结果的内容标签数据的内容标签赋予学习内容，构成学习内容。

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.

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

IPC: G06N3/08 ,  G06N3/045 ,  H04L9/08 ,  G06F21/32

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.

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

IPC: H04L9/32 ,  G06F21/32 ,  G06F21/64 ,  H04L9/08

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.

公开(公告)号：US20190238344A1

公开(公告)日：2019-08-01

申请号：US16318501

申请日：2016-07-21

Applicant: HITACHI, LTD.

Inventor： Yosuke KAGA ,  Kenta TAKAHASHI ,  Masakazu FUJIO ,  Ken NAGANUMA

IPC: H04L9/32 ,  H04L9/08

CPC classification number: H04L9/3268 ,  G06F21/32 ,  G06F21/33 ,  G06F21/64 ,  H04L9/0891 ,  H04L9/0894 ,  H04L9/32 ,  H04L9/3247 ,  H04L2209/38

Abstract: A database management method for controlling, by a computer including a processor, a memory, and a storage device, an in-memory database for storing all tables and indices in the memory and a disk type database for storing a part of a table stored in the storage device in a buffer included in the memory, in which the computer acquires information of the tables and the indices of the in-memory type database, determines the type of reduction operation for reducing an area on the memory used by the indices, executes the type of reduction operation determined for the indices, and adds, to the buffer, an area reduced from the area of the memory used by the indices of the in-memory type database by the reduction operation to expand the buffer of the disk type database.