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admin
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Joined: 18 Apr 2006
Posts: 805
Location: Saint-Petersburg, Russia
Posted: Sun Jan 14, 2007 6:37 am    Post subject: Breaking a Visual CAPTCHA  
Nice reading:

Breaking a Visual CAPTCHA
http://www.cs.sfu.ca/~mori/research/gimpy/

Quote:
This is the homepage of the Shape Contexts based approach to break Gimpy, the CAPTCHA test used at Yahoo! to screen out bots. Our method can successfully pass that test 92% of the time. See EZ-Gimpy in action at Yahoo! The approach we take uses general purpose algorithms that have been designed for generic object recognition. The same basic ideas have been applied to finding people in images, matching handwritten digits, and recognizing 3D objects.

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Oleg Parashchenko, bbAntiSpam
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damnian



Joined: 30 Dec 2006
Posts: 5
Posted: Thu Jan 18, 2007 3:16 am    Post subject:  
Oh really? Does that mean the phpBB CAPTCHA can be broken? Shocked

http://blog.phpbb.cc/articles/captcha/
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admin
Site Admin


Joined: 18 Apr 2006
Posts: 805
Location: Saint-Petersburg, Russia
Posted: Fri Jan 19, 2007 3:07 am    Post subject:  
The default phpBB CAPTCHA can not be not broken. He-He.
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Oleg Parashchenko, bbAntiSpam
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Ok.