<div dir="ltr"><font color="#3366ff"><font><font face="tahoma,sans-serif">I had a good experience with it previously. I totally got rid of spams after installing it.<br><br>THOUGH,<br>One problem I discovered is that a human error (whether intentional or not) may pass the check.<br>
See the examples attached, which I just tried.</font></font></font><br><font color="#3366ff"><b style="color:rgb(255,102,0)"><font><font face="tahoma,sans-serif"><br>1 intentional error in example1<br>2 in example2<br>3 in example3<br>
4 (or even 5) in example4<br>and all passed the check !!<br><br></font></font></b></font><font color="#3366ff"><font><font face="tahoma,sans-serif">Try it yourself..</font></font></font><font color="#3366ff"><font><font face="tahoma,sans-serif"><br>
<br>I wonder how efficient will be a spambot that uses an OCR system to scan the images, and passes the check even if it makes several mistakes. Or even an OCR which tries to do blind guesses.. But after all, it is surely better than nothing.<br clear="all">
</font></font></font><font color="#3366ff"><font><font face="tahoma,sans-serif"></font></font></font><div dir="ltr">
<font color="#3366ff" face="tahoma, sans-serif"><br>Just my 2¢.<br><br></font><div><font color="#3366ff" face="tahoma, sans-serif">Reda</font></div></div><br>
<br><br><div class="gmail_quote">On Thu, Mar 29, 2012 at 09:45, Daniel-Constantin Mierla <span dir="ltr"><<a href="mailto:miconda@gmail.com" target="_blank">miconda@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
Hello,<br>
<br>
anyone has experiences with captcha vs recaptcha (
<a href="http://recaptcha.net/" target="_blank">http://recaptcha.net/</a>).<br>
<br>
There is a plugin for dokuwiki
(<a href="http://www.dokuwiki.org/plugin:recaptcha" target="_blank">http://www.dokuwiki.org/plugin:recaptcha</a>) -- my interest is how
strong the system is to defend against bot spammers, rather than
other good faith things (i.e., helping scanning books for free).<br>
<br>
Cheers,<br>
Daniel<div><br>
<br>
On 3/26/12 10:24 AM, Daniel-Constantin Mierla wrote:
<blockquote type="cite">Hello,
<br>
<br>
just to let you know that over the weekend the ACL (user
authentication) for write access to wiki portals of the project
has been turned on.
<br>
<br>
Anyone that wants to write to the wiki has to create
herself/himself an account. The reason for requiring user
authentication is weakness of the captha system used for anonymous
posting -- during the past weeks lot of wiki pages were updated by
spam bots.
<br>
<br>
If anyone is aware of a stronger captcha-like system to be used
for anonymous posting, write back here. It has to work with
dokuwiki.
<br>
<br>
Cheers,
<br>
Daniel
<br>
<br>
</blockquote>
<br>
<pre cols="72">--
Daniel-Constantin Mierla
Kamailio Advanced Training, April 23-26, 2012, Berlin, Germany
<a href="http://www.asipto.com/index.php/kamailio-advanced-training/" target="_blank">http://www.asipto.com/index.php/kamailio-advanced-training/</a></pre>
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