Comments on: How to implement CAPTCHAs without images http://www.xaprb.com/blog/2006/01/28/captchas-done-better/ Stay curious! Thu, 28 Aug 2008 23:10:47 +0000 http://wordpress.org/?v=2.2.2 By: HAter of http://www.xaprb.com/blog/2006/01/28/captchas-done-better/#comment-13679 HAter of Tue, 13 Nov 2007 21:33:15 +0000 http://www.xaprb.com/blog/2006/01/28/captchas-done-better/#comment-13679 One the easiest spam preventions is just to not allow people to insert html tags into the comment. I find 90% of all form spam has some kind of href in it, and I just /dev/null that stuff One the easiest spam preventions is just to not allow people to insert html tags into the comment. I find 90% of all form spam has some kind of href in it, and I just /dev/null that stuff

]]> By: Anonymous http://www.xaprb.com/blog/2006/01/28/captchas-done-better/#comment-13582 Anonymous Fri, 26 Oct 2007 15:25:36 +0000 http://www.xaprb.com/blog/2006/01/28/captchas-done-better/#comment-13582 From a statistical standpoint, if you are providing the answers as selectable options (i.e. easily parseable from the question), that would be a bad implementation. If you have (say) 6 answers to every question, and an infinite number of questions, they could just spam you 6 times, and one would get through, and we know 1 attempt doesn't cost much. Certainly the typing/grammar aspect of it adds security. From a statistical standpoint, if you are providing the answers as selectable options (i.e. easily parseable from the question), that would be a bad implementation.

If you have (say) 6 answers to every question, and an infinite number of questions, they could just spam you 6 times, and one would get through, and we know 1 attempt doesn’t cost much.

Certainly the typing/grammar aspect of it adds security.

]]> By: Web Mechanic http://www.xaprb.com/blog/2006/01/28/captchas-done-better/#comment-11432 Web Mechanic Sat, 09 Jun 2007 16:50:53 +0000 http://www.xaprb.com/blog/2006/01/28/captchas-done-better/#comment-11432 I just finished installing a CAPTCHA image for a client getting hit by a spam bot. This is an easier solution to implement, especially for those who do not / cannot do any back-end programming. Add to that some bots now have OCR technology embedded in them, so the images are going to get stranger still. This solution can be expanded and adapted. Nice. I'm going to play with it - maybe someone can pay me too :) I just finished installing a CAPTCHA image for a client getting hit by a spam bot. This is an easier solution to implement, especially for those who do not / cannot do any back-end programming. Add to that some bots now have OCR technology embedded in them, so the images are going to get stranger still.

This solution can be expanded and adapted. Nice. I’m going to play with it - maybe someone can pay me too :)

]]> By: chels75 http://www.xaprb.com/blog/2006/01/28/captchas-done-better/#comment-10028 chels75 Thu, 31 May 2007 12:07:25 +0000 http://www.xaprb.com/blog/2006/01/28/captchas-done-better/#comment-10028 nice, it's better than images ;-) nice, it’s better than images ;-)

]]> By: My unorthodox CAPTCHA blocked thousands of spam comments every week at Xaprb http://www.xaprb.com/blog/2006/01/28/captchas-done-better/#comment-9405 My unorthodox CAPTCHA blocked thousands of spam comments every week at Xaprb Mon, 28 May 2007 23:09:36 +0000 http://www.xaprb.com/blog/2006/01/28/captchas-done-better/#comment-9405 [...] my original article, I hypothesized that CAPTCHAs with scrambled images just make it hard for real people to use [...] […] my original article, I hypothesized that CAPTCHAs with scrambled images just make it hard for real people to use […]

]]> By: Xaprb http://www.xaprb.com/blog/2006/01/28/captchas-done-better/#comment-4171 Xaprb Mon, 19 Feb 2007 01:34:25 +0000 http://www.xaprb.com/blog/2006/01/28/captchas-done-better/#comment-4171 <p>In theory, that means lots of people should be spamming me hundreds of times per day. In practice, it's not happening.</p> In theory, that means lots of people should be spamming me hundreds of times per day. In practice, it’s not happening.

]]> By: EvilSpammer :-) http://www.xaprb.com/blog/2006/01/28/captchas-done-better/#comment-4170 EvilSpammer :-) Mon, 19 Feb 2007 00:01:13 +0000 http://www.xaprb.com/blog/2006/01/28/captchas-done-better/#comment-4170 <p>It takes less than 3 minutes to get your list and answers (press refresh in the browser) ... and 5 more minutes to write a perl script wich fills your page....</p> It takes less than 3 minutes to get your list and answers (press refresh in the browser)

… and 5 more minutes to write a perl script wich fills your page….

]]> By: Xaprb http://www.xaprb.com/blog/2006/01/28/captchas-done-better/#comment-3359 Xaprb Wed, 24 Jan 2007 19:18:40 +0000 http://www.xaprb.com/blog/2006/01/28/captchas-done-better/#comment-3359 <p>Sorry, I won't have time to do that; not for free at least. You could pay me :-)</p> Sorry, I won’t have time to do that; not for free at least. You could pay me :-)

]]> By: Trois http://www.xaprb.com/blog/2006/01/28/captchas-done-better/#comment-3355 Trois Wed, 24 Jan 2007 19:02:30 +0000 http://www.xaprb.com/blog/2006/01/28/captchas-done-better/#comment-3355 <p>Could you provide this solution for non WP forms as well? I'm trying to implement it in my enquiry form (which uses FormMail to send me the entered data), but got stuck on connecting the form to the comments.php file. Thank you in advance.</p> Could you provide this solution for non WP forms as well? I’m trying to implement it in my enquiry form (which uses FormMail to send me the entered data), but got stuck on connecting the form to the comments.php file.

Thank you in advance.

]]> By: SSDD Web Design » Article » CAPTCHAs done better http://www.xaprb.com/blog/2006/01/28/captchas-done-better/#comment-2617 SSDD Web Design » Article » CAPTCHAs done better Mon, 27 Nov 2006 04:46:23 +0000 http://www.xaprb.com/blog/2006/01/28/captchas-done-better/#comment-2617 <p>[...] How to implement CAPTCHAs without images. [...]</p> […] How to implement CAPTCHAs without images. […]

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