Analyzing CAPTCHAs 105
Bruce Schneier's blog pointed me to a research paper on
"Attacks and Design of Image Recognition CAPTCHAs" (PDF). The abstract says, "We systematically study the design of image recognition CAPTCHAs (IRCs) in this paper. We first review and examine all IRCs schemes known to us and evaluate each scheme against the practical requirements in CAPTCHA applications, particularly in large-scale real-life applications such as Gmail and Hotmail."
Chinese CAPTCHA farms (Score:2, Informative)
I have a friend that used to bot WoW for a couple years until Blizzard got the law on their side^H^H^H^H^H^H^H^H^H^H^H^H^H in their pocket. Turns out he used to redirect bot checking CAPTCHAs to an IRC channel where the paid minions would solve them.
CAPTCHA has been a moot point to me since I witnessed this process occur in real time.
Re:Chinese CAPTCHA farms (Score:4, Informative)
I heard porn sites were require a captcha to view an image, but it was really a redirect from another captcha. So porn surfers were solving captchas for bots.
Re:hmm... (Score:2, Informative)
I dread Craptcha (Score:3, Informative)