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Grex > Web > #11: code verification script? | |
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| Author |
Message |
fuzzball
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code verification script?
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Apr 3 01:32 UTC 2007 |
ok, the form thing on horrorbox keeps getting filled out with crap
from bots.
im looking for the script that does the little graphic and the user
has to enter the code into a feild to prove its a real person....
i dont know what its called, where to get it, or maby how to code it...
any help?
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| 5 responses total. |
mcnally
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response 1 of 5:
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Apr 3 03:29 UTC 2007 |
It's called a captcha.
http://en.wikipedia.org/wiki/Captchas
Now that you know what it's called, it should be relatively easy to
find a ready-made package to do it for you.
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remmers
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response 2 of 5:
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Apr 3 12:58 UTC 2007 |
CAPTCHA = "Completely Automated Public Turing test to tell Computers and
Humans Apart"
The Wikipedia article has interesting discussion about different types
of CAPTCHAs and techniques for defeating them, some of which are quite
ingenious. Edge-detection techniques can be used to decipher the
characters in a simple graphical CAPTCHA, for example, althought there
are techniques for making edge-detection difficult.
Fighting form spam may prove to be as difficult as fighting email spam.
In any case, I'm not surprised that it's difficult to define a *simple*
test for distinguishing humans from computers.
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fuzzball
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response 3 of 5:
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Apr 3 16:16 UTC 2007 |
thanks guys,
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albaugh
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response 4 of 5:
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Apr 18 21:38 UTC 2007 |
Has anyone tried a "captcha" where the user has to accurately specify, for
example, the local of a special icon some random place on the screen?
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remmers
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response 5 of 5:
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Apr 19 15:09 UTC 2007 |
Haven't seen that specifically, but at first glance it would seem that one
could cook up something that would be easy for a human to solve but
difficult to automate - e.g. a small randomly generated of icons depicting
animals, and you're supposed to type in the coordinates of the horse.
But - there are techniques for defeating captchas that have human beings
in the loop. See the Wikipedia article cited above.
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