This still doesn't solve one of the big CAPTCHA issues. Do look at this USENIX paper in [1]. It's still possible to offshore manual CAPTCHA solving to places wi

This still doesn't solve one of the big CAPTCHA issues. Do look at this USENIX paper in [1]. It's still possible to offshore manual CAPTCHA solving to places with cheap labour at extremely low costs. I don't know how common software solvers are, but my impression is that the technology there is only so-so. [1] Re: CAPTCHAs – Understanding CAPTCHA-Solving Services in an Economic Context http://static.usenix.org/events/sec10/tech/full_papers/Motoyama.pdf http://static.usenix.org/events/sec10/tech/full_papers/Motoy...