sudo mkdir /media/cryptobackup
sudo losetup -a
sudo losetup /dev/loop0 /dev/crypto.bin
sudo cryptsetup luksOpen /dev/loop0 cryptobackup
sudo mount -t ext4 /dev/mapper/cryptobackup /media/cryptobackup


unmounting a bakcup

sudo umount /media/cryptobackup
sudo rmdir /media/cryptobackup
sudo cryptsetup luksClose cryptobackup
sudo losetup -d /dev/loop0