A CAPTCHA that beats bots and spammers


A coworker came across the following CAPTCHA.  Finally, one that can beat spammers and their bots!

image

Comments (5)

  1. JasonG says:

    Quite funny but a light went on…

    So I thought how about a captcha for a captcha?  The main captcha would be a bit like the above example in the way that it has multiple colors/styles of characters (though a bit less so ;).  Then there would be a second dynamicly generated png/gif/etc… that would tell the viewer to enter the red letters only.

    Of course there are other issues (like color blindness) so perhaps the choices would have to be bold/dashed/dotted/slashed/lined-out/etc…

    Is it perfect; of course not.  But it would be an order of magnitude tougher for a bot and the original captcha would have to rely less on distortion which would make it easier for humans.

  2. Ben says:

    Why not just have an image with the caption "What kind of animal, (car), (etc) is this?"

  3. gobledb@hotmail.com says:

    @JasonG:

    Actually MSR has something similar to that:

    http://research.microsoft.com/asirra/?0sr=a