Originally Posted by
matsp
I take it you realize that brute-forcing a 128-bit number will take quite some time, even with multiple cores of a modern high-performance processors. Just doing 2^64 will take some doing, 2^128 is 2^64 longer. 2^64 clock-cycles takes 2^31 (approx 2000 million) secondes on a 2GHz machine. One day is 86400 seconds - one week is half a million seconds, roughly. So 2000 million seconds is about 4000 weeks - which is probably longer than both of us will live. That's just 2^64...
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Mats