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Old 4th November 2011
J65nko J65nko is offline
Join Date: May 2008
Location: Budel - the Netherlands
Posts: 3,504
Default CAPTCHA schemes still easy to bypass

From http://h-online.com/-1371934

Security researchers at Stanford University have found that the vast majority of text-based anti-spam tests are easily bypassed. They cracked the CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) mechanisms of several popular web sites.

The researchers tested the query mechanisms of such sites as Google, eBay and Wikipedia. Only Google's CAPTCHA and the reCAPTCHA systems managed to withstand the attacks.
You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump
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