There are ways to also encrypt the boot partition.<p>There are various protection mechanism that rely on software alone (bootloader), software + hardware (TPM), software + firmware and software + hardware + firmware.<p>The question is always what do you want besides encrypting the main partition mainly in terms of integrity checks.<p>And older BIOS with a TPM or a modern UEFI with or without a TPM can provide additional integrity check for both the host configuration (BIOS&#x2F;Device settings) as well as storage device specific integrity checks.<p>TXT basically allows you to measure various elements using the UEFI and more importantly for OEM&#x27;s at least TXT has extensive DRM capabilities that can restrict the user from installing &quot;untrusted&quot; operating systems or making modifications to the host it self (e.g. chaging bios settings).<p>Beyond that TXT gives only a slight improvement as far as actual security goes against cold boot attacks as it allows you to take measurement when switching between S4 and S5 power states (soft off and hibernate) it still doesn&#x27;t allow any measurement for S1-S3 states which are legacy sleep mode.<p>A modern UEFI with or without a TPM can ensure that the OS will not boot or will boot into recovery mode if any changes were made to the hardware or firmware configurations as well as if any tampering was done to the bootloader (secure boot keys) with a TPM you can be slightly more assured that no one tampered with anything since the TPM is a better cryptographic storage than the UEFI&#x27;s ram&#x2F;nvram.