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. 02, 2021
Filed:
Sep. 10, 2019
Hitachi, Ltd., Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
Provided is a data management system capable of properly managing data to undergo masking processing in the secondary use of data. This data storage management system is equipped with a storage unit which stores masked data of real data at a first point in time, and a data control unit which extracts data of a storage area that has not been masked from update data based on first information representing a masked storage area in the masked data and second information representing a masked storage area in the masked data of update data, which is data obtained by updating the real data from the first point in time to a second point in time, extracts data of the masked storage area, from which the same masked data has been removed, from the masked data of the update data, and generates the extracted data as difference data.