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PostPosted: Tue Nov 23, 2010 8:55 am 
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My board also got hit by a spammer with that avatar.

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PostPosted: Tue Nov 23, 2010 11:47 am 
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Location: NE Indiana, USA (NTSC)
Krebs on Security is running a story about captchabot.com, the CAPTCHA-solving service used by one of the biggest spambotnets.


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PostPosted: Tue Nov 23, 2010 11:52 am 
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Location: Chexbres, VD, Switzerland
I wouldn't be surprised if it was easier for a computer to read a captcha to what is an human. I usually need a lot of tries to pass these things. Of course if there is human spammers this isn't going to do anything about them.

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PostPosted: Tue Nov 23, 2010 12:17 pm 
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Computers have an easier time than humans at optical character recognition, but only if the glyphs are separated. That's why modern visual CAPTCHAs draw various geometry over the words, such as an XOR'd ellipse, and they push the letter spacing closer, so that the glyphs overlap.


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