4May/08Off
Toward a new generation of audio captchas
It seems the post "Breaking Gmail's audio Captcha" has been slashdotted so many interesting discussions have emerged as a result. It's worth noting that there is nothing specially exciting in the approach used to break the google audio captcha, merely a bunch of signal analysis and pattern recognition principles applied. Almost any Voice Recognition / Audio processing software developer can break not only that captcha but, nowadays, any other.
I was planning to write about audio captchas may pose a future attack vector for spammers, but after googling a couple of minutes I stumbled upon the following offer: http://www.getafreelancer.com/projects/C-C-Audio-Services/Recognize-Voice-Captcha-Google.html
Unfortunately the future is right now.
