Captcha

1. freeCap

Author: 2005 Howard Yeend, 2008 TannSan
License: GNU General Public License



  1. freeCap
  2. Freecap Support
  3. source:wacko/lib/captcha

1.1. Modifications

  1. Fixed: Big-endian captcha issues has been tried and tested on both little and big endian systems. Now auto-works on both.
  2. Fixed: Big Endian issues with captcha system. Added a test which attempts to auto-detect the systems big-endian status. Needs testing on a big-endian system.

1.2. freeCapsettings settings

1.2.1. How can I make the image more readable?

freeCap is designed to be as customisable as possible. There are several variables you can change to make the text more readable:

  1. Change the bg_type to 0, 1 or 2
  2. Reduce the chunk factor
  3. Use more readable fonts
  4. Alter the fade factor

But bear in mind that increased human readability means decreased OCR-resistance. On the other hand, a CAPTCHA is more often simply a deterrent and the actual theoretical security matters little.

1.2.2. What can you do about accessibility issues?

Nothing, my suggestion for accessibility is to allow people to enter their details without passing the CAPTCHA, but send non-captcha’ed submittals to a ‘pending’ queue for manual review. It’s a much much simpler solution that still leaves the site accessible.

1.3. WackoWiki related settings

'captcha_new_comment' => 1,
'captcha_new_page' => 1,
'captcha_edit_page' => 1,
'captcha_registration' => 1,