Asus Z170-PRO User Guide - Page 84
KEK Management, The KEK Key‑exchange Key or Key Enrollment Key manages the Signature database
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The PK file must be formatted as a public key certificate or 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). 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. The KEK file must be formatted as a public key certificate or UEFI variable structure with time-based authenticated variable. Delete key Allows you to delete the Key from your system. Configuration options: [Yes] [No] 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. 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. The KEK file must be formatted as a public key certificate or UEFI variable structure with time-based authenticated variable. Delete key Allows you to delete the Key from your system. Configuration options: [Yes] [No] DBX Management The DBX (Revoked Signature database) lists the forbidden images of db items that are no longer trusted and cannot be loaded. Set New Key Allows you to load the downloaded dbx 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. The KEK file must be formatted as a public key certificate or UEFI variable structure with time-based authenticated variable. Delete key Allows you to delete the Key from your system. Configuration options: [Yes] [No] 2-44 Chapter 2: BIOS information