After decryption, my file system presents itself to me as an ordinary directory
that I find somewhere under /media/xy. The encryption program used works in a
way that the device in /dev/xvdi is always encrypted. Only what is currently
accessed in the /media/xy folder is decrypted. Consequently, it does not work
if I use the following command to create a loop that I then mount in another
qube, because it will not be decrypted there:
$disp1: sudo losetup -r /dev/loop0 /dev/xvdi