[JDEV] Jabber and spam?

[Mattias Campe]

wFg-Webber wrote:
>>OCR = Optical Character Regognition.
>>
>>Although I dont know why you mentioned using OCR on those 
>>images since they are supposed to be designed specifically to 
>>fool OCR software so it cant correctly read it, and so only 
>>the human user can make it out.
> 
> 
> True.
> The class I mentioned was written specifically for an online game that uses
> this type of "human-detection". What it does is filter out most of the
> quirkies put into the image to make them hard to decypher, do a remapping to
> a smaller b/w image and then perform a simple OCR. For the site it was built
> for, it's about 90% accurate. In the other 10%, the site won't accept the
> registration (in which case the script simply tries again).
> 
> I think using this technique (and doing it properly) will scare away most
> script kiddies though.

You don't have to stick with numbers and letters. A picture could also 
be send, while the server asks (...through jabber:x:data?):

"What do you see on the picture?"
A) A child playing with a ball
B) A horse
C) A glass of milk


That to-fake-script will probably be a bit harder to write :p.



Mattias