OPHCRACK
Ophcrack is a Windows password cracker based on a time-memory trade-off using rainbow tables. This is a new variant of Hellman's original trade-off, with better performance.
It can crack alphanumeric passwords in 1.67 seconds.
http://lasecwww.epfl.ch/~oechslin/projects/ophcrack/index.php?
It can crack alphanumeric passwords in 1.67 seconds.
http://lasecwww.epfl.ch/~oechslin/projects/ophcrack/index.php?