Crypted disk image

http://www.techrepublic.com/blog/opensource/create-encrypted-loopback-filesystems-on-linux/67

dd if=/dev/urandom of=crypted_image.img bs=1M count=50

• open the device (device_name will be in /dev/mapper)

cryptsetup -M plain -c aes-cbc-plain -h plain open crypted_image.img device_name

• device_name will be in /dev/mapper

• open the device (deprecated)

losetup -e aes /dev/loop0 crypted_image.img 
Password:

• make filesystem (deprecated)

mkfs -t ext2 /dev/loop0

• mount via loop (deprecated)

mount -o loop,encryption=aes crypted_image.img /media/disk