Flash device security method utilizing a check register

Details Flash device security method utilizing a check register Flash device security method utilizing a check register

2006-02-07

2006-02-07

Moise, Emmanuel L. (Department: 2137)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

Computer instruction/address encryption

C713S185000, C380S044000, C711S100000, C711S152000, C711S163000, C711S164000, C710S036000, C710S107000, C710S200000

Reexamination Certificate

active

06996721

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.

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