4 ms·
I don't know that the research says about their effectiveness (hard to find through all the stuff on google) but I've liked the slider-based captchas I've seen:
by carsongross 12y ago
I don't know that the research says about their effectiveness (hard to find through all the stuff on google) but I've liked the slider-based captchas I've seen:
http://www.3dcaptcha.net/ http://www.3dcaptcha.net/
Seems promising given that human visual processing and pattern recognition are lightening fast, and the slider is intuitive and kinda fun.
Anyone know how effective they are at stopping bots?
- fredsted 12y agoAdjust the slider progressively, compare pattern to surrounding images. Or just brute force it. I'd give it a couple days before it would be botted on a large target like gmail or Facebook.
- iaskwhy 12y agoI tried the demo on the site, it would have been very effective at stopping me because of the required precision. I avoid pixel hunting as much as I can. How acessible is this?
- simcop2387 12y agoIf you can end up getting a polygon list from it I'd think it wouldn't be very effective at all. it looks like it decomposes the triangles onto multiple planes so that they only line up when rotated one way, but you can calculate that rotation based on the rotation of the planes that the polygons are on. Even if they correct that, you'd still likely be able to find whatever image has the lowest amount of white pixels (or whatever the background is) and probably do a reasonable job at least with the example on the page.
- vitd 12y agoI get no catpcha - just "Missing PlugIn". So not very useful for a human.