from the captcha-captcha-chameleon dept.
Falkkin writes "Ars Technica reports that audio CAPTCHAs consisting of only distorted digits or letters can be easy to crack using machine learning techniques. This includes most of the audio CAPTCHAs currently in use on the Web. The reCAPTCHA team has discussed their new audio CAPTCHA, which is resistant to this attack."
"They that can give up essential liberty to obtain a little temporary
saftey deserve neither liberty not saftey."
-- Benjamin Franklin, 1759