System and method for protecting integrity of alterable ROM using digital signatures
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United States of America Patent
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Sep 1, 1998
Grant Date -
N/A
app pub date -
May 31, 1996
filing date -
May 31, 1996
priority date (Note) -
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Abstract
A system and method for verifying the integrity of a computer system's BIOS programs stored in alterable read only memory (such as FLASH ROM), and preventing malicious alteration thereof. The system and method regularly check the contents of the alterable read only memory using a digital signature encrypted by means of an asymmetrical key cryptosystem.
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