Comment 6 for bug 1959113

rpi-imager currently has no facility to encrypt the image it flashes to the storage on the Pi (and making such a facility generic enough that it would fit all potentially interested distros is a daunting task to say the least), so this isn't valid for rpi-imager.

I *did* add some initial steps towards this in the lunar desktop images, which preserve space at the end of the root partition for LUKS headers (by ensuring the root file-system doesn't expand *all* the way to the partition size) which should make this easier to achieve in future, but there's still plenty of work to be done here.