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:
Apr. 28, 2026
Filed:
Feb. 15, 2024
Hitachi, Ltd., Tokyo, JP;
Yuto Kamo, Tokyo, JP;
Mitsuo Hayasaka, Tokyo, JP;
Hitachi Vantara, LTD., Kanagawa-Ken, JP;
Abstract
Provided is a storage system capable of detecting a malicious program without executing compression processing of data. A storage system includes a processor that processes data input to and output from a storage device. The processor operates thereon a duplication detection program which deduplicates duplicated data, stores the deduplicated data in the storage device, calculates a duplication rate being a ratio of duplicated data in a predetermined unit of storage, and detects a change between a duplication rate before an update of the data and a duplication rate after the update of the data in units of the predetermined unit of storage. Moreover, the processor operates thereon a ransomware detection program which detects that the data is updated by ransomware, when a decrease amount of the duplication rate exceeds a duplication rate threshold value relating to the change in duplication rate detected by the duplication detection program.