Dennis and Ross discuss different methods of implementing CAPTCHA on the web and how to make it accessible.
Download Web Axe Episode 40 (About CAPTCHA and Accessibility)
CAPTCHA Services
- captchas.net
- Protect Web Form
- PHP Contact Form
- AuthImage
- WP-Gatekeeper
- Do your own!
References
- CAPTCHA on Wikipedia
- Proposal for an Accessible Captcha
- Inaccessibility of CAPTCHA
- Alternatives to Visual Turing Tests on the Web
- CAPTCHA is bad for accessibility
- CAPTCHA.biz
News
- Improving accessibility for today’s AJAX – To hack or not? from Access Matters
- Refresh Detroit February meetup
3 replies on “Podcast #40: About CAPTCHA and Accessibility”
Hey your site uses captcha, could have used it as an example. Anyway, you guys ever notice you use “yeah” and “… yeah definitely…” as a segue a lot
Yeah definitely. 😉
Yup, we are pretty agreeable guys. But good to think about other segues.
The blogger captcha is pretty good, not too hard to read and there is an audio alternative. Seems they don’t have an API that I am aware of to use it on other sites.
I’ve written an accessible captcha system in PHP that’s available under the LGPL from my site System-X Accessible Captcha – textTHaCAA