Method for BIOS authentication prior to BIOS execution
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United States of America Patent
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Jun 4, 2002
Grant Date -
Jan 10, 2002
app pub date -
Jul 17, 1998
filing date -
Jul 17, 1998
priority date (Note) -
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Abstract
A cryptographic device is implemented in communication with a host processor to prevent the host processor from performing a standard boot-up procedure until a basic input output system (BIOS) code is authenticated. This is accomplished by a cryptographic device which is addressed by the host processor during execution of a first instruction following a power-up reset. The cryptographic device includes a first integrated circuit (IC) device and a second IC device. The first IC device includes a memory to contain firmware and a root certification key. The second IC device includes logic circuitry to execute a software code to authenticate the BIOS code before permitting execution of the BIOS code by the host processor.
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