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Frederik Van Zande

Best unobtrusive anti-spam technique (Not CAPTCHA) | Urbano's Blog - 0 views

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    I know you are probably thinking that this will be some silly thing, but this idea that Thomas Landauer came up with is by far the best I've seen in a long time. Add CSS-hidden fields that a user won't see, but a spam-bot will fill. Then using php check if they were filled, and if they were: block the spammer!
Frederik Van Zande

Beyond CAPTCHA: No Bots Allowed! [Privacy and Trust] - 0 views

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    I'm sure you've seen them many times -- those wild squiggles that need to be deciphered and typed into a text box before you can buy concert tickets online or access a comment form.
Frederik Van Zande

Using captcha without displaying it - 0 views

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    How I use captcha without making my users complete the barely readable word
Paulo Nogueira

reCAPTCHA: Stop Spam, Read Books - 0 views

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    Site que implementa o captcha via webservice
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