Asus PRIME Z270-A PRIME_Z270-A_AR_BIOS ManualEnglish - Page 61
Install Default Secure Boot keys, Clear Secure Boot keys
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Key Management Install Default Secure Boot keys This item allows you to immediately load the default Security Boot keys, Platform key (PK), Key-exchange Key (KEK), Signature database (db), and Revoked Signatures (dbx). When the default Secure boot keys are loaded, the PK state will change from Unloaded mode to loaded mode. Clear Secure Boot keys This item appears only when you load the default Secure Boot keys. This item allows you to clear all default Secure Boot keys. Save Secure Boot Keys This item allows you to save the PK (Platform Keys) to a USB storage device. PK Management The Platform Key (PK) locks and secures the firmware from any permissible changes. The system verifies the PK before your system enters the OS. Save to file This item allows you to save the PK to a USB storage device. Set New key This item allows you to load the downloaded PK from a USB storage device. Delete key This item allows you to delete the PK from your system. Once the PK is deleted, all the system's Secure Boot keys will not be active. Configuration options: [Yes] [No] The PK file must be formatted as a UEFI variable structure with time-based authenticated variable. KEK Management The KEK (Key-exchange Key or Key Enrollment Key) manages the Signature database (db) and Revoked Signature database (dbx). Key-exchange Key (KEK) refers to Microsoft® Secure Boot Key-Enrollment Key (KEK). Save to file This item allows you to save the KEK to a USB storage device. Set New key This item allows you to load the downloaded KEK from a USB storage device. Append Key This item allows you to load the additional KEK from a storage device for an additional db and dbx loaded management. ASUS PRIME Z270-A/AR Series BIOS Manual 61