Stanford University researchers break NuCaptcha video security

Cnet - When it launched in 2010, NuCaptcha touted its proprietary technology as being able to "provide the highest level of security available" by using video streams to display those distorted letters you type in to prove you're really a human.

Now, however, the company's claims of providing "the next generation of Captcha security" look a tad optimistic.  Read more.