Another good idea come up from Elcomsoft .
Their password crack software uses GPU accelerator instead CPU in order to increase the cracking velocity.To know more about this fast method read advertising this paper . This topic arrives at the same time of a passwords security brief that I'm summarizing for a note Italian Magazine for this reason I feel very close to this kind of problem. As I'm writing the password chose is really important to guarantee enterprise safety. Using Mnemonic Password Formula (MPF) in a world where every service is owned by different account has become capital. MPFs are easy to remember for the end user and hard to crack in fact they follow a random character probabilistic distribution. The following pictures represent easy but useful Mnemonic Passwords Formula.
Examples that respect this grammar are the following:
- "firstname.lastname@example.org", that's means Marco Ramilli at www.blogger.com
- "email@example.com", that's means Matt Bishop at cs.ucdavis.edu
Another password formula useful and easy to remember is the following:
Where the initial number represents the typology of the password. For instance the number "0" can represents that password is used for private purpose instead "1" for work purpose.
- "0:firstname.lastname@example.org;", that's means Marco Ramilli at www.blogger.com as personal password
- "1:email@example.com;", that's means Matt Bishop at cs.ucdavis.edu as work password
These are just few example of MPF power, to learn more about these formulas follow these liks:
 Bugaj, Stephan Vladimir. More Secure Mnemonic-Passwords: User-Friendly
Passwords for Real Humans”
 Kotadia, Munir. Microsoft Security Guru: Jot Down Your Passwords
 Williams, Randall T. The Passphrase FAQ
 Jeff Jianxin Yan and Alan F. Blackwell and Ross J. Anderson and Alasdair
Grant. Password Memorability and Security: Empirical Results