Catptcha is the small image you have to look at and type in when you’re leaving a comment at someone’s blog. This prevents bots from doing what we humans don’t want them to do- add spam.
Captcha’s are a good solution for dealing with spam (accessibility is a consideration if you don’t have an audio message as an alternate to reading the Captcha image). But did you know that they are getting beaten by Jitendra Malik & Greg Moriand, PWNtcha, OCR Research Teamand Brains-n-Brawn to name a few, all utilizing OCR techniques?
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