Decrypt at boot with USB stick

Linux Distributions Arch Linux
1

Hi everyone,

I installed arch with a LUKS encrypted LVM (as shown in this video).
So now I would like to have a USB stick as an alternative method of unlocking my LVM at boot. When I’m at home I would keep the USB permanently plugged in my notebook so it boots without asking for the password. On the other hand I want the system to ask for the password when the USB is not connected.

What would be the best way to set this up?

2

I don’t know of a way to do that myself, but I’m hoping someone else will know because that sounds like a fun project.