Brion Vibber wrote:
I've been tinkering with an extension to provide
for a captcha to reduce
automated linkspamming while still staying out of the way for common use.
My preliminary code is running now on
test.leuksman.com; the actual
"captcha" part is a really primitive plain text hack which would take
all of a few minutes for a dedicated attacker to crack, but don't worry
about that -- I'm not testing the protection yet, just the framework it
plugs into.
...
As for a 'real' captcha generator to put into this system; I'm not too
sure what code is already out there that's not awful. There's a Drupal
plugin which would be easy to rip GPL'd PHP code from, but it doesn't
seem very robust.
There's a set of samples of various captcha output and their weaknesses
here:
http://sam.zoy.org/pwntcha/
Obviously it would be good to either find something on the 'hard
captchas' list rather than 'defeated captchas', or roll our own that
doesn't suck too bad.
There's also the question of whether we can feasibly provide an audio
alternative or whathaveyou.
-- brion vibber (brion @
pobox.com)
I've just written some Python code which can do _this_ to text: is this
the sort of thing you are looking for?
-- Neil