OpenEuphoria

Re: Spam

• Posted by Al Getz <Xaxo at aol.com> Apr 02, 2007
• 519 views

Juergen Luethje wrote:
> 
> Al Getz wrote:
> 
> > Hi there,
> > 
> > 
> > We've had this problem for a while now too at another web site
> > that i moderate.  The posters keep posting ads and it doesnt help
> > to block their nick as they simply register with another nick
> > and do the same thing and have the b***s to post the same darn post
> > with the same stupid link to the same stupid site!!
> > After deleting several hundred posts and more than 20 posts per
> > day something more had to be done as it takes time to do all this work.
> > To deal with this, the admins are making the registration process
> > more 'machine unfriendly' by making the user type information
> > read on the reg page where the information is typed using a very
> > strange and varied font, something (presumably) a computer program
> > can not do.
> 
> You are talking about Captchas, aren't you? Here is some more information:
> <a href="http://sam.zoy.org/pwntcha/">http://sam.zoy.org/pwntcha/</a>
> 
> Also interesting (probably easier to use for humans, and harder to
> "use" for machines than Captchas) are "Mawchas". I only have a
> German page at hand (look for the cross on the picture and click at
> it with the mouse):
> <a href="http://n">http://n</a>ögel.de/mawcha/index.php
> 
> Regards,
>    Juergen

hi Juergen,


Yes, That's it!
I guess the theory here is that if a computer can generate it then
a computer can decode it, knowing the generator algorithm beforehand.
The key here is "knowing the generator".  It has to be complex enough
to make reverse engineering very difficult.  I dont know for sure
how practical this is, but im sure it's of some use as it will at
least takes care of some of the 'less knowledgable' computer driven
posters.

This gets kind of interesting in that a computer program has to
try to determine if it is dealing with another computer program,
as opposed to a human who is trying to tell.  The more clever the
algorithm the harder it will be for the 'impostor' to get by without
detection.  Then there is also the time line theory...will the impostor
be able to keep up with the changes employed by the generator/detector?
To do so it would have to be incredibly adaptive, not just simply be
able to solve those problems which have been known for N weeks.


Take care,
Al

E boa sorte com sua programacao Euphoria!


My bumper sticker: "I brake for LED's"

 From "Black Knight":
"I can live with losing the good fight,
 but i can not live without fighting it".
"Well on second thought, maybe not."