Storage device and control method
US11507284B2 · kind B2 · utility
0Cited by
3References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2019 |
| Grant date | Nov 22, 2022 |
| Priority date | — |
| Expiry date | Apr 24, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/14
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.