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. 22, 2022
Filed:
Sep. 04, 2019
Applicant:
Kioxia Corporation, Tokyo, JP;
Inventors:
Assignee:
Kioxia Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G06F 3/06 (2006.01); H04L 9/08 (2006.01);
U.S. Cl.
CPC ...
G06F 3/0622 (2013.01); G06F 3/0655 (2013.01); G06F 3/0679 (2013.01); H04L 9/088 (2013.01);
Abstract
According to one embodiment, a storage device includes a nonvolatile storage medium and a controller. The controller encrypts data with an encryption key, writes encrypted data into the storage medium, and manages a first and second encryption keys. The first encryption key encrypts data to be written into a first area and a second encryption key encrypts data to be written into a second area. The controller updates, if the first area is write protected and the second area is not write protected, the second encryption key without updating the first encryption key when receiving an initialization command from a host.