Installing this package lets you configure a special "nuke password" that can be used to destroy the encryption keys required to unlock the encrypted partitions. This password can be entered in the usual early-boot prompt asking the passphrase to unlock the encrypted partition(s).

This provides a relatively stealth way to make your data unreadable in case you fear that your computer is going to be seized.

After installation, use “dpkg-reconfigure cryptsetup-nuke-password” to configure your nuke password.