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1. 发明公开

US20230388306A1 DATA CIRCULATION CONTROL METHOD, DATA CIRCULATION CONTROL SYSTEM, AND APPROVAL SERVER 审中-公开
公开(公告)号：US20230388306A1
公开(公告)日：2023-11-30
申请号：US18031973
申请日：2022-01-27
申请人： Hitachi, Ltd.
发明人： Tadashi KAJI , Hiromitsu KATO , Masayuki YOSHINO , Hiroki UCHIYAMA , Tomohiro SHIGEMOTO
IPC分类号： H04L9/40
CPC分类号： H04L63/10 , H04L63/20
摘要： In a data circulation control method, an approval server including a processor and a memory controls access to data between a provision party computer providing the data and a use party computer using data. The method includes: a purpose accomplishment status notifying step in which the use party computer notifies the approval server of a use status of the previously approved data; a use application step in which the use party computer makes application to the approval server for a use policy including protection level information related to a security measure when the data is used and a use purpose of the data; and an access control step in which the approval server controls access of the use party computer to the data of the provision party computer based on the use status of the data, the protection level information, and the use purpose of the data.

2. 发明申请

US20210192025A1 SERVICE SUPPORT SYSTEM AND SERVICE SUPPORT METHOD 有权
公开(公告)号：US20210192025A1
公开(公告)日：2021-06-24
申请号：US17254528
申请日：2019-06-18
申请人： HITACHI, LTD.
发明人： Takayuki SUZUKI , Masayuki YOSHINO , Tetsuhiro HATOGAI , Masaaki TANIZAKI
IPC分类号： G06F21/31 , G06F21/62 , G06F21/60
摘要： A service support system comprises a data user request obtaining part 41 that obtains a predetermined data provision request from a predetermined terminal, a personal information obtaining part 42 that obtains personal information on a requester of the data provision request, a providable data obtaining part 43 that obtains predetermined providable data from a predetermined terminal, a processed data generating part 44 that generates processed data which is data of a response to the data provision request by processing the obtained providable data based on the obtained personal information on the requester, and a communication restricting part 49 that restricts transmission of the obtained data provision request, the obtained personal information on the requester, and the generated processed data to outside of the processed data generating part 44.

3. 发明申请

US20170322977A1 METHOD FOR RETRIEVING ENCRYPTED GRAPH, SYSTEM FOR RETRIEVING ENCRYPTED GRAPH, AND COMPUTER 审中-公开
公开(公告)号：US20170322977A1
公开(公告)日：2017-11-09
申请号：US15524145
申请日：2014-11-07
申请人： HITACHI, LTD.
发明人： Ken NAGANUMA , Yoshinori SATOU , Hisayoshi SATO , Masayuki YOSHINO , Kunihiko KIDO
IPC分类号： G06F17/30 , G06F21/62
CPC分类号： G06F16/24553 , G06F16/9024 , G06F21/6227 , G09C1/00
摘要： A system for retrieving an encrypted graph, in which a first computer generates an encrypted graph, and a second computer retrieves the encrypted graph, wherein: the first computer generates a secret key, encrypts a graph that includes a start point, an edge, and an end point to generate an encrypted graph, generates an encryption query, transmits encrypted graph data in which the encrypted graph and the encryption query are correlated for each edge and a searchable encryption matching function to the second computer, generates an encrypted graph retrieval query in which a graph to be retrieved is encrypted by the retrievable cryptogram query function, and transmits the generated retrieval query to the second computer; and the second computer, accepts the received encrypted graph retrieval query and encrypted graph data as inputs, and executes a retrieval process using the searchable encryption matching function.

4. 发明申请

US20190034646A1 DATABASE SYSTEM AND DATA RETRIEVAL METHOD 审中-公开
公开(公告)号：US20190034646A1
公开(公告)日：2019-01-31
申请号：US16080286
申请日：2016-03-28
申请人： Hitachi, Ltd.
发明人： Keisei FUJIWARA , Yumiko YOKOHARI , Takayuki SUZUKI , Yoshinori SATO , Masayuki YOSHINO
IPC分类号： G06F21/60 , G06F17/30 , H04L9/00 , G06F21/62
摘要： A database system including: a database server for storing registration information including encrypted data encrypted using a probabilistic encryption method; and a terminal. The terminal includes: an encryption unit; a decryption unit; an encrypted search query generating unit for generating an encrypted search query obtained by encrypting a search query used for retrieving the encrypted data; and an additional processing unit for encrypting a search condition of a plaintext and transmitting a data acquisition request including the encrypted search condition. The database server holds database operation command definition information and search additional information. The database server includes: a database operation command generating unit for generating a database operation command by converting the data acquisition request on the basis of the database operation command definition information; and a database control unit for acquiring encrypted data satisfying the search condition by using the database operation command and the search additional information.

5. 发明申请

US20180048467A1 Key Generator, Computer System, and Encryption Statistical Processing Method 审中-公开
公开(公告)号：US20180048467A1
公开(公告)日：2018-02-15
申请号：US15544937
申请日：2016-03-02
申请人： Hitachi, Ltd.
发明人： Masayuki YOSHINO , Hisayoshi SATO , Ken NAGANUMA
IPC分类号： H04L9/08 , H04L9/06
CPC分类号： H04L9/0869 , G09C1/00 , H04L9/008 , H04L9/0662 , H04L9/085 , H04L2209/08 , H04L2209/24
摘要： When data analysis is made in a server to which data is entrusted according to the technique disclosed in JP 5679018, individual cipher text is required to be decrypted in the server. That is, when basic statistics are computed in the server, a problem occurs that plain text of individual data is disclosed to the server side. The key generator according to the present invention transmits the sum of random numbers which is a key used when individual plaintext data is encrypted to the server as a key for decrypting the sum of ciphertext data, and the server decrypts the sum of ciphertext data using the key.

6. 发明申请

US20210279368A1 PERSONAL INFORMATION ANALYSIS SYSTEM AND PERSONAL INFORMATION ANALYSIS METHOD 有权
公开(公告)号：US20210279368A1
公开(公告)日：2021-09-09
申请号：US17255634
申请日：2019-06-18
申请人： HITACHI, LTD.
发明人： Takayuki SUZUKI , Masayuki YOSHINO , Tetsuhiro HATOGAI , Masaaki TANIZAKI
IPC分类号： G06F21/62 , G06F21/60 , G06K9/62
摘要： An analysis execution part 11 that, in response to a request for an analysis on a predetermined subject utilizing pieces of personal information 35, generates a first analysis result based on a plurality of pieces of personal information associated with an item necessary for performing the analysis, and anonymizes the plurality of pieces of personal information 35 and generates a second analysis result for the request for the analysis based on the anonymized pieces of information, and an analysis result evaluation part 12 that generates information on a difference between the generated first analysis result and the generated second analysis result are provided.

7. 发明申请

US20190260715A1 COMPUTER SYSTEM, CONNECTION APPARATUS, AND PROCESSING METHOD USING TRANSACTION 审中-公开
公开(公告)号：US20190260715A1
公开(公告)日：2019-08-22
申请号：US16276798
申请日：2019-02-15
申请人： Hitachi, Ltd.
发明人： Takayuki SUZUKI , Toshirou YAMAYOSHI , Hisayoshi SATO , Masayuki YOSHINO , Ken NAGANUMA , Dai WATANABE
IPC分类号： H04L29/06 , H04L9/06 , G06F16/2455 , H04L9/30 , G06F17/18
摘要： A computer system includes a plurality of processing nodes constituting a blockchain network and a connection apparatus connecting to the blockchain network. The processing node holds information. The connection apparatus includes a connection processing unit that transmits a transaction to the processing node. The connection processing unit includes an encryption processing unit that generates searchable ciphertext from a keyword based on a probabilistic encryption method. The encryption processing unit generates, from the keyword, the searchable ciphertext to be used as an address indicating a transmission source or a transmission destination of the transaction, and generates the transaction including the searchable ciphertext.

8. 发明申请

US20160335450A1 SEARCHABLE ENCRYPTION PROCESSING SYSTEM AND SEARCHABLE ENCRYPTION PROCESSING METHOD 审中-公开
标题翻译：可搜索的加密处理系统和可搜索的加密处理方法
公开(公告)号：US20160335450A1
公开(公告)日：2016-11-17
申请号：US15111747
申请日：2015-01-14
申请人： HITACHI, LTD.
发明人： Masayuki YOSHINO , Hisayoshi SATO , Ken NAGANUMA , Yoshinori SATO
IPC分类号： G06F21/62 , H04L9/08 , G06F17/30 , H04L9/00
CPC分类号： G06F21/6227 , G06F16/334 , G06F16/35 , H04L9/008 , H04L9/0894
摘要： A searchable encryption processing system includes a server including: a communication device to communicate with another device; a storage device configured to store as search target data, secret data obtained by concealing plaintext data, and a secret index obtained by concealing a plaintext index to classify the plaintext data; and an arithmetic device to execute a process including receiving, from a search client, a secret data query obtained by concealing a plaintext query, and a secret index query obtained by concealing a plaintext index, searching the storage device for a secret index matching the secret index query based on a predetermined searchable encryption technique, searching a secret data group classified by the matching secret index for secret data matching the secret data query, and returning the searched secret data to the search client.
摘要翻译：一种可搜索加密处理系统，包括：服务器，包括：与另一设备通信的通信设备; 存储装置，被配置为存储作为搜索目标数据，通过隐藏明文数据获得的秘密数据和通过隐藏明文索引而获得的秘密索引来对明文数据进行分类; 以及执行包括从搜索客户端接收通过隐藏明文查询获得的秘密数据查询和通过隐藏明文索引而获得的秘密索引查询的处理的算术装置，搜索与所述秘密相匹配的秘密索引的存储设备基于预定的可搜索加密技术的索引查询，搜索通过匹配秘密索引分类的秘密数据组用于与秘密数据查询匹配的秘密数据，并将搜索的秘密数据返回到搜索客户端。

9. 发明公开

US20230334057A1 INFORMATION PROVIDING METHOD 审中-公开
公开(公告)号：US20230334057A1
公开(公告)日：2023-10-19
申请号：US18026212
申请日：2021-03-22
申请人： Hitachi, Ltd.
发明人： Keiichi SATO , Tsutomu KAINUKI , Masayuki YOSHINO , Mayuko YAMAMOTO , Akira TSUBOYAMA , Shiroh NAGURA
IPC分类号： G06F16/2458
CPC分类号： G06F16/2458
摘要： An information providing method to be executed by an information providing system includes: a first step of acquiring, by a second terminal, the action data corresponding to the data ID from a management server when the second terminal transmits to the management server a request to acquire the personal information including the data ID; a second step of acquiring, by the second terminal, the personal information from the management server when the second user has access authority for the personal information associated with the data ID; and a third step of transmitting, by the second terminal, the information to the first terminal of a first user identified by the personal information when the second terminal acquires the action data and the personal information.

10. 发明申请

US20190318104A1 DATA ANALYSIS SERVER, DATA ANALYSIS SYSTEM, AND DATA ANALYSIS METHOD 审中-公开
公开(公告)号：US20190318104A1
公开(公告)日：2019-10-17
申请号：US16379457
申请日：2019-04-09
申请人： Hitachi, Ltd.
发明人： Masayuki YOSHINO , Hisayoshi SATO , Ken NAGANUMA , Takayuki SUZUKI
IPC分类号： G06F21/60 , G06N20/00 , G06N5/04 , H04L9/08
摘要： A data analysis server holds base-point-added information, wherein the base-point-added information includes a value of an explanatory variable encrypted by first high-performance encryption, a value of a response variable encrypted by a predetermined encryption scheme, and a base point based on frequencies of the value of the explanatory variable in information for learning are associated with one another, wherein the data analysis server: executes decision tree generation processing for generating a decision tree having a leaf node associated with the value of the response variable encrypted by the predetermined encryption scheme, which is included in the base-point-added information; and execute branching rule determine processing in decision tree generation processing without decrypting the value of the explanatory variable and the base point corresponding.

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