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What am I missing? Breaking this looks much easier than a regular captcha... This is the sort of problem that genetic algorithms are well suited for (a small,

by dlss 12y ago

What am I missing? Breaking this looks much easier than a regular captcha... This is the sort of problem that genetic algorithms are well suited for (a small, well defined input domain with a binary oracle). You'd simply generate a random path, run a smoothing function over it, see if that works, then iterate. edit: does anyone know a site that is actually using this new widget? I only seem to be finding the older version... :/

joelthelion 12y ago
You're missing the fact that they're relying on many cues, not just mouse movement. I don't think they're even discolosing everything they use.
- dlss 12y ago
  You're missing the fact that they went from something that is quite difficult to get a program to do (essentially an AI complete task) to one that's not AI complete. It doesn't really matter how many non-AI complete components they are measuring... without at least one AI complete task, they removed the thing that makes CAPTCHAs work.
  - joelthelion 12y ago
    Except distorted text reading is not hard for AI anymore, and all "AI-complete" tasks, whatever that means, are pretty much broken nowadays. So where left with a very hard problem, and their best solution so far seems to be security through obscurity with a bunch of non-disclosed "cues". Not great, but I guess it's hard to come up with anything better.