http://www.tomshardware.com/reviews/password-recovery-gpu,2945.html

"Can we break your password with our GPUs?"



To quote Bob the builder, "yes we can!"

Perhaps the surprising thing is that (say) a 6-character password 
doesn't look all that secure, and yet an 12-character password appears 
to be utterly unbreakable. Password security does not scale linearly 
with password size. It scales exponentially.

Also, the whole analysis seems to be concerned with "all possible 
combinations". That isn't how real humans write passwords. So I'd say 
all their security predictions are more than a tad optimistic!

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