Asus PRIME X370-A Manual page 52

PK Management
The Platform Key (PK) locks and secures the firmware from any non‑permissible
changes. The system verifies the PK before your system enters the OS.
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
The KEK file must be formatted as a public key certificate or UEFI variable structure with
time‑based authenticated variable.
DB Management
The db (Authorized Signature database) lists the signers or images of UEFI
applications, operating system loaders, and UEFI drivers that you can load on the
single computer.
The db file must be formatted as a UEFI variable structure with time‑based authenticated
variable. DBX Management
2‑31
Save to File
This item allows you to save the downloaded 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.
Save to File
Allows you to save the downloaded KEK to a USB storage device.
Set New Key
Allows you to load the downloaded KEK from a USB storage device.
Append Key
Allows you to load the additional KEK from a storage device for an
additional db and dbx loaded management.
Delete key
Allows you to delete the Key from your system. Configuration options: [Yes]
[No]
Save to File
Allows you to save the downloaded db to a USB storage device.
Set New Key
Allows you to load the downloaded db from a USB storage device.
Append Key
Allows you to load the additional KEK from a storage device for an
additional db and dbx loaded management.
Secure Boot Key‑Enrollment Key (KEK).
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ASUS PRIME X370-A