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
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
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@gmail.comwrote:
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/
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
29 mar 2012 kl. 09:45 skrev Daniel-Constantin Mierla:
Hello,
anyone has experiences with captcha vs recaptcha ( http://recaptcha.net/).
I'm using recaptcha on a couple of sites. It works fine for me.
On the downside, it dies with IPv6... Hopefully google is going to fix that, at least to the World IPv6 Launch. /O
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, Germany
http://www.asipto.com/index.php/kamailio-advanced-training/ _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
--- * Olle E Johansson - oej@edvina.net * Cell phone +46 70 593 68 51, Office +46 8 96 40 20, Sweden
Thank you for feedback so far.
What is strength comparing with normal CAPTCHA?
As I understood (from http://www.recaptcha.net), one word (out of the two) in reCAPTCHA is not used for security, it can be typed wrong. So I wondered what is better in recaptcha than captcha...
Cheers, Daniel
On 3/29/12 1:21 PM, Olle E. Johansson wrote:
29 mar 2012 kl. 09:45 skrev Daniel-Constantin Mierla:
Hello,
anyone has experiences with captcha vs recaptcha ( http://recaptcha.net/).
I'm using recaptcha on a couple of sites. It works fine for me.
On the downside, it dies with IPv6... Hopefully google is going to fix that, at least to the World IPv6 Launch. /O
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, Germany
http://www.asipto.com/index.php/kamailio-advanced-training/ _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
- Olle E Johansson - oej@edvina.net
- Cell phone +46 70 593 68 51, Office +46 8 96 40 20, Sweden
-
Daniel-Constantin Mierla -
Olle E. Johansson -
Reda Aouad