Method for the secure remote flashing of the BIOS of a computer

Details Method for the secure remote flashing of the BIOS of a computer Method for the secure remote flashing of the BIOS of a computer

1997-04-16

1999-01-12

Cain, David

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

H04K 100

Patent

active

058599118

ABSTRACT:
In a computer system having a receiving computer and a source computer, a method for the remote flashing of the BIOS in the receiving computer including the steps of transferring the flash information from the source computer to the receiving computer, with the flash information including the flash code, the flash code instructions and an encrypted digital signature corresponding to the flash code. The receiving computer is operably placed in a secure mode. A hash value corresponding to the flash information is calculated, and the hash value from the flash information is decrypted. The flash code is validated by comparing the decrypted hash value of the flash information to the calculated hash value, and if validated, the BIOS if flashed with the new flash code.

REFERENCES:
patent: 5440632 (1995-08-01), Bacon et al.
patent: 5444850 (1995-08-01), Chang
patent: 5734819 (1998-03-01), Lewis
patent: 5787367 (1998-07-01), Berra

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