Flash device security method utilizing a check register
US6996721B2 · kind B2 · utility
2Cited by
17References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 27, 2001 |
| Grant date | Feb 7, 2006 |
| Priority date | — |
| Expiry date | Oct 28, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/2022
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A security method for preventing accidental or unauthorized writes to a flash memory. According to one embodiment of the present invention, a BIOS program stored in a flash memory array generates a random access code when executed by a processor. A check register stores the random access code and enables write operations to the flash memory array based upon an externally provided access code. In another embodiment, the BIOS program directs the processor to write the random access code to the check register to enable write operations in response to an external write request.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.