A complicated calculus-based anti-spam CAPTCHA

Graham Cluley

Croatian eggheads are having fun with a web form designed to stretch mathematical minds and prevent spam bots.

Would you be able to complete the form?Read more in my article at Naked Security.

Graham Cluley Graham Cluley is a veteran of the anti-virus industry having worked for a number of security companies since the early 1990s when he wrote the first ever version of Dr Solomon's Anti-Virus Toolkit for Windows. Now an independent security analyst, he regularly makes media appearances and is an international public speaker on the topic of computer security, hackers, and online privacy. Follow him on Twitter at @gcluley, or drop him an email.
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