writes "NuCaptcha’s technology substitutes a brief video display of characters for the usual smash or squiggle of letters. It’s definitely easier on the human eye, and its creators say it’s also much more secure.
Moreover, if humans find NuCaptcha as legible as machines find it illegible, it should help increase signups while decreasing spambots for web services and applications.
The article isn't much more informative but they do have an effective example of this new technology which was easier on my eyes than the captcha for this submission."Link to Original Source