Brute-Force Password Cracking With GPUs

An anonymous reader writes "We all know that brute-force attacks with a CPU are slow, but GPUs are another story. Tom's Hardware has an interesting article up on WinZip and WinRAR encryption strength, where they attempt to crack passwords with Nvidia and AMD graphic cards. Some of their results are really fast — in the billions of passwords per second — and that's only with two GTX 570s!"

I wonder

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If we throw enough GPUs at it, if we could detect dupes on Slashdot?