The setup uses 25 AMD Radeon graphics cards and can make 350 billion guesses per second. All eight-character passwords fall in hours; some take only six minutes.

Your really, really strong password just became a little bit easier to break.
Jeremi Gosney, founder and CEO of Stricture Consulting Group, a company that handles password-cracking, has unveiled a computer cluster boasting 25 AMD Radeon graphics cards. The cluster's horsepower allows it to make 350 billion password guesses per second against the NT Lan Manager (NTLM) security protocol Microsoft has used in Windows Server since 2003.

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