Secure BIOS
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United States of America Patent
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-
Dec 1, 1998
Grant Date -
N/A
app pub date -
Sep 30, 1996
filing date -
Sep 30, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A subsystem prevents unauthorized modification of BIOS program code embedded in modifiable non-volatile memory devices such as flash memory. A cryptographic coprocessor containing the BIOS memory device performs authentication and validation on the BIOS upgrade based on a public/private key protocol. The authentication is performed by verifying the digital signature embedded in the BIOS upgrade.
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