On 27/07/12 16:31, Everton Zanella Alvarenga wrote:
2012/7/26 Platonides Platonides@gmail.com:
Thet don't need to read English. They just need to type the letters they see on the image. Sure, you can have a small advantage if you know what letters could make a valid English word (or if you have the captcha dictionary installed), but a Brazilian which can read wikipedia should have no problems typing the captcha.
If that is the case, why don't we change the CAPTCH for random letters?
You should probably ask Neil Harris, the author of the captcha generator we use.
from his 06/02/2011 mail:
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.
I have added a random captcha at http://test.wikipedia.beta.wmflabs.org/ You can try adding urls at http://test.wikipedia.beta.wmflabs.org/w/index.php?title=Main_Page&actio... and http://en.wikipedia.beta.wmflabs.org/wiki/Wikipedia:Sandbox for comparing the presented captchas.
(yes, testwikibeta is quite broken right now, but the captchas show)