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PSW #759 - Ismael Valenzuela

Paul's Security Weekly (Audio)

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EFI Secure Boot, BIOS Guard and Boot Guard - What's the Difference?

There's definitely a difference between you EFI secure boot, BIOS guard signed BIOS updates and boot guard. Essentially they all use like different keys or signatures or hashing. So what I believe happened here is these are like dev QA kind of keys. The private key counterpart was never fused to any production system.

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