RE: Spam resistent guestbook ?
At 07:27 AM 9/26/2006 +0100, James Stevenson wrote:
>Have you seen the forms with random printed letters you need to enter ?
>This is to fool ocr software. But it still human readable. But it does stop
>the thing being machine postable.
That reminded me of a spam trap on one Direct Connect hub I get on. U can't
use main chat until u type in the "release code". It's a normal sentence
with junk interspersed in a random place. U have to type in that junk to be
able to chat. Presumably no spam script would be able to read and
understand a sentence and know which part didn't belong there. It would go
something like this:
> This hub has an anti-spam featA@*df_aliewm49jZCC#$aku09ure. U must type
in the code contained in this sentence to access main chat.
> A@*df_aliewm49jZCC#$aku09
The same thing can be done with a guestbook form or a message board. The
code is never in the same place twice. The problem with a form that just
has an "enter this code" spot is that a script can just scan for that phrase
and take the next word after that as the code word. All effective spam
traps have to have a task that a human can perform but a script cannot.
With the current technology level this only leaves reasoning skills.
Eventually the scripts will even be able to do this. I can only imagine how
hard it's going to be for the admin's 100 years from now to stop spam!
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