Method and device for protecting memory content using first and second addressable storage regions and first and second encryption keys
US9081724B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2011 |
| Grant date | Jul 14, 2015 |
| Priority date | — |
| Expiry date | Apr 17, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/78
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of protecting digital data stored in a storage medium. The method comprises providing a first and a second addressable storage region in the storage medium, and selector means for selectively indicating one of the first and the second addressable storage regions as active; storing the digital data in the first addressable storage region of the storage medium, wherein the digital data stored in the first addressable storage region is stored encrypted with a first encryption key; and causing the selector means to indicate the first addressable storage region as being active; and, responsive to a trigger event, copying the digital data from the first to the second addressable storage region, wherein the digital data stored in the second addressable storage region is stored encrypted with a second encryption key; and causing the selector means to indicate the second addressable storage region as being active.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.