Secure Boot Explained: From UEFI to TPM

The Boot Chain of Trust

Secure Boot, Measured Boot, TPM attestation, and kernel lockdown work together to ensure your system boots into a known, trusted state every time.

Components

1. UEFI Secure Boot: Verifies bootloader signature

2. Measured Boot: TPM records boot measurements

3. TPM Attestation: Remote verification of boot state

4. Kernel Lockdown: Restricts root access to kernel