On 05/02/11 22:36, Platonides wrote:
praveenp wrote:
There is atleast one successful captcha php script for Malayalam Language (http://sourceforge.net/projects/mlcaptcha/ , http://mlcaptcha.blogspot.com/2010/02/blog-post_24.html ). I don't know whether it can work with mediawiki.
It could be added, although I find that particular captcha easier for bots than for humans. And an attacker can easily play with the parameters to weaken it even more.
Alternatively, you could add a Malayalam wordlist to the current Wikipedia captcha, which would have the same effect, and has (I hope) a better visual obfuscation method than this, designed specifically to resist some of the most recent bot decoding methods.
Perhaps we could have a place to add these wordlists on the meta-wiki or on translatewiki, to allow people without transmit rights to create them? All that is needed is about 2,000 short words for each language, which can be used to create around 4,000,000 possible challenge words, which will in turn will be used to create an endless stream of captcha images, no two of which should ever be alike.
The wordlists themselves need not be secret: they are only needed to create easily-typed strings that are sufficiently large in number to provide a moderate challenge to brute force guessing.
-- Neil