Comments on: 5 Layer Spam Filter http://blog.primalskill.com/5-layer-spam-filter/ Dream. Design. Code. Thu, 19 Aug 2010 08:39:21 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Nepkos.com » 10 tips for good web site design|TIps http://blog.primalskill.com/5-layer-spam-filter/comment-page-1/#comment-52042 Nepkos.com » 10 tips for good web site design|TIps Sun, 04 Apr 2010 13:52:28 +0000 http://blog.primalskill.com/?p=268#comment-52042 [...] CAPTCHAs, use more usable methods instead. AKPC_IDS += "3864,";Popularity: unranked [...] [...] CAPTCHAs, use more usable methods instead. AKPC_IDS += "3864,";Popularity: unranked [...]

]]> By: Nepali Media :: 10 tips for good web site design|TIps :: March :: 2010 http://blog.primalskill.com/5-layer-spam-filter/comment-page-1/#comment-51915 Nepali Media :: 10 tips for good web site design|TIps :: March :: 2010 Mon, 22 Mar 2010 12:18:58 +0000 http://blog.primalskill.com/?p=268#comment-51915 [...] CAPTCHAs, use more usable methods [...] [...] CAPTCHAs, use more usable methods [...]

]]> By: saleem http://blog.primalskill.com/5-layer-spam-filter/comment-page-1/#comment-50951 saleem Wed, 30 Dec 2009 11:37:13 +0000 http://blog.primalskill.com/?p=268#comment-50951 The proposed 5 Layer spam filter is weak since a bot can be created to pass all described layers. The proposed 5 Layer spam filter is weak since a bot can be created to pass all described layers.

]]> By: Jhon http://blog.primalskill.com/5-layer-spam-filter/comment-page-1/#comment-50902 Jhon Sat, 26 Dec 2009 10:05:11 +0000 http://blog.primalskill.com/?p=268#comment-50902 Have a text-field hidden by css. Let Javascript set the value of the text-field to a special word, when the form is submited, the php-code checks for the special word. Bots don't use javascript and therefore the textfield is not filled in with the required word. This may work even if google-toolbar for example fills the form automatically.. maybe.. Have a text-field hidden by css. Let Javascript set the value of the text-field to a special word, when the form is submited, the php-code checks for the special word. Bots don’t use javascript and therefore the textfield is not filled in with the required word. This may work even if google-toolbar for example fills the form automatically.. maybe..

]]> By: amenodimeno http://blog.primalskill.com/5-layer-spam-filter/comment-page-1/#comment-46900 amenodimeno Fri, 31 Jul 2009 17:50:39 +0000 http://blog.primalskill.com/?p=268#comment-46900 That's good man, keep it going. That’s good man, keep it going.

]]> By: Malvolio http://blog.primalskill.com/5-layer-spam-filter/comment-page-1/#comment-46294 Malvolio Sat, 11 Jul 2009 00:17:17 +0000 http://blog.primalskill.com/?p=268#comment-46294 Require the posting software to factor a large prime-number (or perform some other difficult calculation) -- something that the Javascript function you supply can do in a few seconds. Even if some spammer were dedicated enough to write the code, it would cut down on his ability to send more than a few thousand spams a day. Require the posting software to factor a large prime-number (or perform some other difficult calculation) — something that the Javascript function you supply can do in a few seconds. Even if some spammer were dedicated enough to write the code, it would cut down on his ability to send more than a few thousand spams a day.

]]> By: romonoeroetoko http://blog.primalskill.com/5-layer-spam-filter/comment-page-1/#comment-46215 romonoeroetoko Wed, 08 Jul 2009 16:16:07 +0000 http://blog.primalskill.com/?p=268#comment-46215 Hm that sounds good but I would like to know more details. Hm that sounds good but I would like to know more details.

]]> By: 10 Usability Tips for Web Designers « D-sign http://blog.primalskill.com/5-layer-spam-filter/comment-page-1/#comment-45030 10 Usability Tips for Web Designers « D-sign Wed, 29 Apr 2009 17:04:15 +0000 http://blog.primalskill.com/?p=268#comment-45030 [...] CAPTCHAs, use more usable methods instead. Tags: Design Inspiration, web [...] [...] CAPTCHAs, use more usable methods instead. Tags: Design Inspiration, web [...]

]]> By: Klaus http://blog.primalskill.com/5-layer-spam-filter/comment-page-1/#comment-42003 Klaus Wed, 11 Feb 2009 14:40:53 +0000 http://blog.primalskill.com/?p=268#comment-42003 Well most bots don't use javascript either, so that would classify them as bots wouldn't it? Well most bots don’t use javascript either, so that would classify them as bots wouldn’t it?

]]> By: Gyorgy Fekete http://blog.primalskill.com/5-layer-spam-filter/comment-page-1/#comment-42000 Gyorgy Fekete Wed, 11 Feb 2009 13:52:04 +0000 http://blog.primalskill.com/?p=268#comment-42000 Braille readers doesn't use Javascript.. The hidden input fields can be included with Javascript then... Any other ideas are welcome and together we can make this code better. :) Braille readers doesn’t use Javascript.. The hidden input fields can be included with Javascript then…

Any other ideas are welcome and together we can make this code better. :)

]]> By: Klaus http://blog.primalskill.com/5-layer-spam-filter/comment-page-1/#comment-41999 Klaus Wed, 11 Feb 2009 13:26:27 +0000 http://blog.primalskill.com/?p=268#comment-41999 I am concerned about offscreen input fields. For anyone who is a bit inclusive in their designs will start thinking about braille, there is a few of them around you might have to consider. I'm not saying captcha is good because I hate it for the same reasons and most of the algorithms are just plainly unreadable and not exactly optimal. I am concerned about offscreen input fields. For anyone who is a bit inclusive in their designs will start thinking about braille, there is a few of them around you might have to consider.

I’m not saying captcha is good because I hate it for the same reasons and most of the algorithms are just plainly unreadable and not exactly optimal.

]]> By: Pete Williams http://blog.primalskill.com/5-layer-spam-filter/comment-page-1/#comment-41946 Pete Williams Tue, 10 Feb 2009 00:36:21 +0000 http://blog.primalskill.com/?p=268#comment-41946 Well, I did some thinking about how we could best avoid using CAPTCHA and posted my comments on my blog: http://petewilliams.info/blog/2009/02/why-captcha-sucks-and-what-to-do-about-it/ Thanks for the inspiration and I hope my comments help. Pete Well, I did some thinking about how we could best avoid using CAPTCHA and posted my comments on my blog: http://petewilliams.info/blog/2009/02/why-captcha-sucks-and-what-to-do-about-it/

Thanks for the inspiration and I hope my comments help. Pete

]]> By: Why CAPTCHA Sucks and What to do About it | Pete Williams http://blog.primalskill.com/5-layer-spam-filter/comment-page-1/#comment-41945 Why CAPTCHA Sucks and What to do About it | Pete Williams Mon, 09 Feb 2009 23:47:28 +0000 http://blog.primalskill.com/?p=268#comment-41945 [...] Fekete has come up with a 5 Layer Spam Filter that uses some cunning techniques to identify bots without having to resort to [...] [...] Fekete has come up with a 5 Layer Spam Filter that uses some cunning techniques to identify bots without having to resort to [...]

]]> By: Gyorgy Fekete http://blog.primalskill.com/5-layer-spam-filter/comment-page-1/#comment-41903 Gyorgy Fekete Mon, 09 Feb 2009 06:45:59 +0000 http://blog.primalskill.com/?p=268#comment-41903 @Pete Williams: Very interesting, I didn't calculated for automatic form fillers... Hmm. That's a challenge! @Pete Williams: Very interesting, I didn’t calculated for automatic form fillers…

Hmm. That’s a challenge!

]]> By: Pete Williams http://blog.primalskill.com/5-layer-spam-filter/comment-page-1/#comment-41887 Pete Williams Sun, 08 Feb 2009 22:55:26 +0000 http://blog.primalskill.com/?p=268#comment-41887 Great post, it's good to see someone tackling the accesibility nightmare that is CAPTCHA! However, I think Layers 2 and 3 may be flawed - a lot of people now use automated form fillers, for example RoboForm or Google Toolbar's Autofill feature. This means that any fields a spam bot would fill in will be filled in, and it also enables us to fill in most forms in just a couple seconds. Your system would potentially label these users as spammers. I guess the solution might be to use all the above methods in combination, perhaps giving a weighting to each... gives me something to think about! Pete Great post, it’s good to see someone tackling the accesibility nightmare that is CAPTCHA! However, I think Layers 2 and 3 may be flawed – a lot of people now use automated form fillers, for example RoboForm or Google Toolbar’s Autofill feature. This means that any fields a spam bot would fill in will be filled in, and it also enables us to fill in most forms in just a couple seconds.

Your system would potentially label these users as spammers. I guess the solution might be to use all the above methods in combination, perhaps giving a weighting to each… gives me something to think about! Pete

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