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manunkind
Client


Joined: Apr 26, 2004
Posts: 368
Location: Albuquerque, NM

PostPosted: Mon Jul 09, 2007 6:06 am Reply with quote

I've been reading up on these various systems and am learning that most implementations of it are very ineffective.

Here's a pretty interesting read:
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Just thought I'd post it here for the Raven Team.

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jakec
Site Admin


Joined: Feb 06, 2006
Posts: 3048
Location: United Kingdom

PostPosted: Mon Jul 09, 2007 6:27 am Reply with quote

That is an interesting read.

The captcha in RN is a vast improvement over the standard Nuke one, but I'm sure further work can be done on it.

I know Guardian is looking at using an animated GIF, which would make it extremely difficult to crack.
 
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montego
Site Admin


Joined: Aug 29, 2004
Posts: 9449
Location: Arizona

PostPosted: Mon Jul 09, 2007 6:54 am Reply with quote

Yeah, I personally like the direction of requiring human reasoning power to figure out "problem". But, unfortunately, like with most captchas, it can really hurt the visually impaired folks.

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jakec
PostPosted: Mon Jul 09, 2007 10:16 am Reply with quote

To be honest it's a shame we have to do this in the first place Sad
 
Gremmie
Former Moderator in Good Standing


Joined: Apr 06, 2006
Posts: 2415
Location: Iowa, USA

PostPosted: Mon Jul 09, 2007 10:22 am Reply with quote

It should be mentioned that link isn't safe for work. Shocked

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Only registered users can see links on this board! Get registered or login! - An Event Calendar for PHP-Nuke
Only registered users can see links on this board! Get registered or login! - A Google Maps Nuke Module 
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evaders99
Former Moderator in Good Standing


Joined: Apr 30, 2004
Posts: 3221

PostPosted: Wed Jul 11, 2007 12:23 pm Reply with quote

Seen this link already, without seeing the script in-action, I have no guarentees on its effectiveness. There are many spam engines that will break CAPCHTAs though, so it may be a mute point.

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Gremmie
PostPosted: Wed Jul 11, 2007 12:51 pm Reply with quote

There was a recent posting on Slashdot related to this subject:
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fkelly
Former Moderator in Good Standing


Joined: Aug 30, 2005
Posts: 3312
Location: near Albany NY

PostPosted: Fri Nov 02, 2007 7:49 am Reply with quote

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Spammers employ stripper to break Captcha
 
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montego
PostPosted: Sat Nov 03, 2007 8:51 am Reply with quote

Isn't it sickening? Now how do you stop from having actual human beings being employed to register at a bunch of sites? How can you win... Sad
 
manunkind
PostPosted: Sun Nov 04, 2007 2:26 pm Reply with quote

montego wrote:
Isn't it sickening? Now how do you stop from having actual human beings being employed to register at a bunch of sites? How can you win... Sad


You can't. Game over.
 
fkelly
PostPosted: Mon Nov 05, 2007 7:49 am Reply with quote

I agree with manunkind with one major exception. For web sites that are "private" or even semi-private (local clubs, soccer leagues, family groups etc.) and where you don't need or even want to boost membership beyond the local interest group, having some kind of Approve Membership would really help. Spammers could still get thru, but if you made them write a paragraph or so about "why they want to join your site" and evaluated where they are from etc., the number who would get thru would be cut significantly. Perhaps for RN 3.0 (or whatever) we can get this done.
 
Guardian2003
Site Admin


Joined: Aug 28, 2003
Posts: 6792
Location: Ha Noi, Viet Nam

PostPosted: Tue Feb 12, 2008 8:22 am Reply with quote

As always, the problem remains the same.
How do you take measures to prevent spammers and other undesirables from siging up without it affecting accessibility or putting off the peple who genuinely want to sign up.
If I had to write some text about why I wanted to join a site every time, I would very quickly not even bother joining sites any more.

Of course you can use a combination of CAPTCHA's, blacklist comparing, referer checking etc to really narrow things down but even with those, you will still get the odd email from someone who is disgrntled because their registration was rejected.

I use Montego's Approve Membership Lite which is a great little tool and I have also added a warning on my registration page that I will reject applications from gmail, hotmail and other 'free' email accounts. In my 'rejection' email I do include an email link which genuine users who still apply using these amail accounts can contact me for me to review their application.
I have probably rejected over 300 registrations in the last year, of which maybe 4 emailed me to ask why they had been rejected using the link in my rejection email.
 
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montego
PostPosted: Wed Feb 13, 2008 6:54 am Reply with quote

BTW, I will be releasing the 2.20.00 version today or tomorrow. I have it ready but just need the time...
 
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