I understand LUKs can be used to encrypt your data. But what would prevent somebody plug in a USB with and just wipe my drive?
On traditional BIOS like Lenovo, HP, Dell and even Framework you can set a supervisor password that locks the boot menu. So nobody can boot from the USB.
Coreboot is different though. I spoke with Starlabs whose computers run Coreboot, and apparently you can have the boot menu password. OTOH, Sys76’s Coreboot doesnt allow such things.
I ask because i want to libreboot my T480, but the number 1 thing i worry is unauthorized USB boot.
This one: https://libreboot.org/docs/linux/grub_hardening.html#grub-password
seems to only lock the ability to edit the grub entry freely, aka press “e” to change stuff when grub fails to boot.
Imo any attacker that has access to the hardware cannot be countered by software. There always is a badusb or sodder this here chip type attack possible against any attempt at locking up your pc.
You can encrypt and backup, but any legends about tpm, bios passwords, weird hardware encryption features and keys are moot once an attacker can read what transits on the pcie or memory bus