On 29/03/07, Ian Smith ismith@good.com wrote:
I think this currently works for edits, not user creation.
The default is to trigger on edits which add new external links (i.e. possible spam) to pages, but it can be configured to trigger on, e.g. all anonymous edits. It can also be triggered on account creation if desired.
The default ConfirmEdit contains a weak text-based math implementation which is not a particularly foolproof captcha. There's also FancyCaptcha, which requires manual generation of captcha images using a "secret" and a word list, and is the best solution. In between those two is MathCaptcha, which uses the math renderer (texvc) to generate simple sums and render them as images...this one's better than the default, but still not as good as FancyCaptcha.
Rob Church