References
1. https://code.google.com/p/cryptsetup/wiki/DMCrypt
2. https://code.google.com/p/cryptsetup/wiki/FrequentlyAskedQuestions
3. https://wiki.archlinux.org/index.php/LUKS
4. https://wiki.archlinux.org/index.php/System_Encryption_with_eCryptfs
5. http://manual.aptosid.com/en/hd-install-crypt-en.htm#install-crypt
6. http://en.wikipedia.org/wiki/Comparison_of_disk_encryption_software

