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Diamond Factory, Anthrax Investigation, Auto-Tune, Luis...

A computer scientist finds novel ways to stop spammers and harness the brainpower of millions of people.
Topic: Tech + EngineeringTech & EngineeringNova

(Program not available for streaming.) Growing up in Guatemala, where his family owned a candy factory, computer scientist Luis von Ahn seemed like your average video-game-addicted, TV-watching kid. But von Ahn is now heralded as one of the brains behind CAPTCHA, the world's most ubiquitous computer security program. He is also a professor at Carnegie Mellon University, where he works to combine the best skills of humans and computers. His projects capitalize on the countless hours we humans waste at our keyboards, and he and his students are turning the stuff of games into valuable tools for transforming the Internet.

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