29 Mar
2012
29 Mar
'12
4:28 a.m.
I had a good experience with it previously. I totally got rid of spams
after installing it.
THOUGH,
One problem I discovered is that a human error (whether intentional or not)
may pass the check.
See the examples attached, which I just tried.
*
1 intentional error in example1
2 in example2
3 in example3
4 (or even 5) in example4
and all passed the check !!
*Try it yourself..
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.
Just my 2¢.
Reda
On Thu, Mar 29, 2012 at 09:45, Daniel-Constantin Mierla
<miconda(a)gmail.com>wrote;wrote:
Hello,
anyone has experiences with captcha vs recaptcha ( http://recaptcha.net/).
There is a plugin for dokuwiki (http://www.dokuwiki.org/plugin:recaptcha)
-- 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).
Cheers,
Daniel
On 3/26/12 10:24 AM, Daniel-Constantin Mierla wrote:
Hello,
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.
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.
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.
Cheers,
Daniel
--
Daniel-Constantin Mierla
Kamailio Advanced Training, April 23-26, 2012, Berlin,
Germanyhttp://www.asipto.com/index.php/kamailio-advanced-training/
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