"Oh, yea... Prove it!"
...even strong passwords can be cracked in seconds using an open source tool called Ophcrack.
Ophcrack is an extremely fast password cracker because it uses a special algorithm called rainbow tables. Brute-force cracking tools typically try thousands of combinations of letters, numbers and special characters each second, but cracking a password by attempting every conceivable combination can take hours or days. (by Scott Sidel)
