> "can't be cracked"
Not sure about that. Certainly tough, but crackable.
http://stackoverflow.com/questions/448963/has-recaptcha-been...
http://www.allspammedup.com/2011/01/google-recaptcha-cracked...
Not sure about that. Certainly tough, but crackable.
http://stackoverflow.com/questions/448963/has-recaptcha-been...
http://www.allspammedup.com/2011/01/google-recaptcha-cracked...
> reCAPTCHA uses a “one-off” system. That means a letter in a word can be incorrect, and it will still be accepted by the system.