[bwestergard]

This is a really cool idea.

I'm trying to envision the attacks and countermeasures for this approach. I suppose what I would do to fake this is write a program that takes text and the desired output histogram of edit timings and randomly introduces jitter into the typing. Then, I'd imagine you'd develop more sophisticated statistical tests, and so on. My intuition is that eventually there would be no statistical test that reliably discriminates real human typing.

[juanre]

Exactly! I was considering writing it myself in order to discourage an arms race. I do not think the battle can be won, but it is certainly worth fighting. At least increase the friction.

On the other hand "Failed a Turing test" would be a good bumper sticker.