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Possible BIOS modification to add customer secure key into BIOS for default secure boot.
for some application it need add customized secure keys in BIOS as default , which could be done by BIOS modification (source code change)
basically user should provide the secure keys according to secure boot application,
• Platform Key (PK)
• Key Exchange Keys (KEK)
• Authorized Signatures (DB)
which are .cer (Public Key Certificate) files
With BIOS modification, it possible to integrated the secure key in BIOS as default keys.