Human Determination: A critique of CAPTCHAs — 45 minutes; accepted
You're familiar with CAPTCHAs getting in your way. But why are they such an ubiquitous security measure to begin with? Why are there different implementations and which problem are they attempting to solve? During this lecture you'll learn how these "Human Interactive Proofs" came to be, how they're still evolving, why they are a bad solution to the wrong problem, and which solutions are preferable within a set of common scenarios.