Re: [tlug] CAPTCHA on keitai

[Jason Hall <jason@example.com>]

> > Audio CAPTCHAs are certainly not widely deployed

One of the easiest implementations I've seen is http://recaptcha.net/
which also displays an option to use an audio captcha.

For the visual ones, I like the concept behind the system being used for
cleaning up unreadable scans of old texts. Two words are presented. One
is known to the system, the other is for the user to tell the system
what it says, when enough people agree, the answer feeds back to an OCR
project.

- Jason