Comments on: ColdFusion Alternative to Captcha? http://www.vintagecoding.com/blog/2008/07/19/alternative-to-captcha/ Personal & technical ramblings... Fri, 12 Mar 2010 01:51:53 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Lu Sancea http://www.vintagecoding.com/blog/2008/07/19/alternative-to-captcha/comment-page-1/#comment-232 Lu Sancea Sun, 20 Jul 2008 21:23:49 +0000 http://www.vintagecoding.com/blog/?p=121#comment-232 Good, that makes me feel better. I figured that it would be the quickest way to handle the bots...especially if you use captcha too. Good, that makes me feel better. I figured that it would be the quickest way to handle the bots…especially if you use captcha too.

]]> By: JohanS http://www.vintagecoding.com/blog/2008/07/19/alternative-to-captcha/comment-page-1/#comment-230 JohanS Sun, 20 Jul 2008 20:36:10 +0000 http://www.vintagecoding.com/blog/?p=121#comment-230 I've used a similar approach for a few years now and it works well for me. I create a "random" field name (a hidden input field) and value using a hash of the session ID and also use the same value to name the form. Once submitted I check for the random field exists and has the random value. The other simpel thig I do is count how many links are in the message and if there are more and 2-5 say and add "SPX" to the form listing/email notification subject to flag potential spam - invariably the ones that make it past the random field. I’ve used a similar approach for a few years now and it works well for me. I create a “random” field name (a hidden input field) and value using a hash of the session ID and also use the same value to name the form. Once submitted I check for the random field exists and has the random value.

The other simpel thig I do is count how many links are in the message and if there are more and 2-5 say and add “SPX” to the form listing/email notification subject to flag potential spam – invariably the ones that make it past the random field.

]]>