The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 16, 2021
Filed:
Sep. 19, 2019
Hitachi, Ltd., Tokyo, JP;
The University of Tokyo, Tokyo, JP;
Yuya Isoda, Tokyo, JP;
Kazuhiko Mogi, Tokyo, JP;
Kouji Kimura, Tokyo, JP;
Kazuo Goda, Tokyo, JP;
Yuto Hayamizu, Tokyo, JP;
Masaru Kitsuregawa, Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
THE UNIVERSITY OF TOKYO, Tokyo, JP;
Abstract
There is provided a database management system (DBMS) in order to make anonymization processing of the database efficient. When receiving a query including a conversion rule, the database management system is configured to process a relationship table in the database based on the conversion rule. At that time, the DBMS is configured to acquire data from a processing result table (result of processing the relationship table) stored in the past for tuples the number of which for each value appearing in a predetermined attribute satisfies a condition required for the anonymization processing. On the other hand, for tuples the number of which for each value appearing in a predetermined attribute does not satisfy the condition required for the anonymization processing, the DBMS is configured to acquire data from the database or from a result of processing the relationship table, the result being stored in rather than the processing result table.