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With Linux, are you using secure boot? (discuss.tchncs.de)

submitted 1 week ago* (last edited 1 week ago) by gandalf_der_12te@discuss.tchncs.de to c/asklemmy@lemmy.world

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For those of you who are using linux: Are you using secure boot? I.e. is your bootloader configured to only decrypt your disk and boot your OS, while blocking all "booting from USB stick" and such?

I'm asking because i'm considering a very specific attack vector, through which a sufficiently skilled agent (e.g. FBI, CIA) could install a keylogger into your OS and get access to your sensitive data that way, even when your disk is encrypted and without your knowledge.

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[-] mlfh@lm.mlfh.org 48 points 1 week ago

A partial solution to this evil-maid attack vector is Heads firmware (a replacement for the bios/uefi itself), which lets you sign the contents of your unencrypted boot partition using a gpg key on a hardware token, and verify the integrity of the firmware itself using a totp/hotp key stored in the tpm.

All the benefits of secure boot, but you get to control the signing keys yourself instead of relying on a vendor. It's great stuff.

[-] gandalf_der_12te@discuss.tchncs.de 13 points 1 week ago

this is exactly what i was looking for.

this post was submitted on 13 Apr 2026

117 points (100.0% liked)

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