Secure boot
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United States of America Patent
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Aug 10, 1999
Grant Date -
N/A
app pub date -
Sep 30, 1996
filing date -
Sep 30, 1996
priority date (Note) -
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status (Latency Note)
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Abstract
A subsystem prevents unauthorized replacement of boot-up firmware (e.g., BIOS) embedded in modifiable non-volatile memory devices such as flash memory. The firmware device is contained in a secure boot device which is responsive to the host processor. The security protection is established by the encryption and decryption of the boot-up instructions using a secret key shared by both the secure boot device and the host processor.
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