- What is a Captcha, and why is it not the ultimate protection against automated attacks?
- Why do I see a Captcha sometimes, when I'm looking at pictures?
- Why are there so many free online games?
- How does Google Images get their pictures labeled so accurately?
- How do hackers and spammers setup multiple online accounts, using scripts, even with Captchas required by the online accounts?
Captchas and Online Games: Human Computation (Luis Von Ahn: July 26, 2006)
And here's a later story. The New Scientist: CAPTCHAs conquered?, or my mirror if the New Scientist web site is still slow responding. And an additional opinion: brains-N-brawn.
Having seen the video, and read the additional stories, answer the poll.
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