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How robots and spiders are causing issues, how to stop them. We can also talk about Completely Automated Public Turing Test To Tell Computers And Humans Apart - their use, their compliance issues, porn proxies, PWNtcha and other ways to defeat them. 

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5 years ago
royfdvorak23
I am a captcha newbie so I do not how sophisticated my idea for a captcha would be. Using PHP: Define a seed string of upper and lower case letters, plus numbers. Generate a random string of 512 or 1024 or whatever length long. Divide the length of the generated string by the number of characters in the captcha string - call this number 'Nindex' Generate a random number between 0 and Nindex
Forum: Robots/Spiders/CAPTCHAs, oh my
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