Here is the command that will render a LUKS encrypted device un recoverable
From the documentation.
5.4 How do I securely erase a LUKS container?
For LUKS, if you are in a desperate hurry, overwrite the LUKS header and
key-slot area. For LUKS1 and LUKS2, just be generous and overwrite the
first 100MB. A single overwrite with zeros should be enough. If you
anticipate being in a desperate hurry, prepare the command beforehand.
Example with /dev/sde1 as the LUKS partition and default parameters:
I can't remember but having my hard drive encrypted, I believe there is a single file that messing with it would render the drive not decryptable.
Here is the command that will render a LUKS encrypted device un recoverable
From the documentation.
5.4 How do I securely erase a LUKS container?
For LUKS, if you are in a desperate hurry, overwrite the LUKS header and key-slot area. For LUKS1 and LUKS2, just be generous and overwrite the first 100MB. A single overwrite with zeros should be enough. If you anticipate being in a desperate hurry, prepare the command beforehand. Example with /dev/sde1 as the LUKS partition and default parameters:
head -c 100000000 /dev/zero > /dev/sde1; sync