Asus H170-PLUS D3 User Guide - Page 75
Secure Boot
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2.8.8 Secure Boot Allows you to configure the Windows® Secure Boot settings and manage its keys to protect the system from unauthorized access and malwares during POST. OS Type [Windows UEFI mode] Allows you to select your installed operating system. [Windows UEFI mode] This item allows you to select your installed operating system. Execute the Microsoft® Secure Boot check. Only select this option when booting on Windows® UEFI mode or other Microsoft® Secure Boot compliant OS. [Other OS] Get the optimized function when booting on Windows® non-UEFI mode. Microsoft® Secure Boot only supports Windows® UEFI mode. Key Management This allows you to manage the Secure Boot keys. 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, all the Secure Boot keys' 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 the previously applied Secure Boot keys. Save Secure Boot Keys This item allows you to save all the Secure Boot keys to a USB storage device. 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. Delete PK 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. Load Default PK Select Yes to load the system default PK or select No to load a downloaded PK from a USB storage device. 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). ASUS H170-PLUS D3 2-41