alternative captcha methods

Question

I\'m looking for inspiration here. I need to employ some sort of human verification for my website, but the most common method these days (asking users to type the letters &

Answer 1

Although it's a bit old, I really found KittenAuth to be an amusing (and probably very effective) captcha approach. There only seems to be one demo on their contact page, though.

The problem with pure-image based approaches (as opposed to textual images) is that you are basically preventing blind users from using your site. The KittenAuth author acknowledged this on one of the comments on his site.

As a funny little rider to KittenAuth, this page has "10 of the worst captchas of all time," including one of my favorites: