This page explains how coreboot can help with various security aspects of your system, compared to closed-source, legacy BIOS/EFI/firmware implementations.
Common security features
- Boot password (like BIOS password)
- Signature verification - option to boot from payload only signed images
Bayou / coreinfo / GRUB2 have "BIOS password"-like feature, using SHA-1 hashes stored in NVRAM or the (flash) ROM chip. GRUB2 can also do signature verification of on-disk operating systems. TianoCore could probably be adapted to support either, too.
Both features are in the payload domain since coreboot doesn't provide a user interface.
- RAM wiping after each boot
This is not very useful: The most interesting time would be right before power-off, which could be implemented in SMM. Unfortunately a cautious attacker just pulls the plug.
To prevent reading data after a reboot, a payload could be adapted to clean out memory. Using applications that manage sensible data sensibly (ie. wipe after use) is still a better solution.
- Support booting from encrypted block devices/volumes
GRUB2 can do that.
Current BIOS issues
- Coreinfo as demo payload for coreboot, showing your RAM contents after a cold boot.