Comment Re:I Got It! (Score 3, Interesting) 538
I'd just double the time it takes for each try.
First bad password: 1 second to retry.
Second bad password: 2 seconds to retry.
Third bad password: 4 seconds to retry.
Fourth bad password: 8 seconds to retry.
Fifth bad password: 16 seconds to retry.
You get the idea. It'll end brute-force and only mildly inconvenience clueless users with fat fingers.