Captchas and Online Games
This is a pretty long video, but it's still worth the time to watch. It discusses these issues, and more.
- 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?
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