by Tom Simonite, Technology Review
Software can solve video puzzles intended to prevent spam bots acting like humans. It’s been getting harder to prove you’re a human online in recent years. The squiggly letters known as CAPTCHAs that protect websites against spam software have got more distorted, as the software has got better at reading them. That was why I thought it worth noting when NuCaptcha launched its video CAPTCHAs, which are easier for humans but still secure and have been adopted by sites including Groupon. Now researchers at Stanford suggest they, too will have to become more cryptic.
http://www.technologyreview.com/blog/editors/27607/?p1=blogs
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