More than Captcha?

With my other site, I added a security question in addition to the Captcha security to avoid spam. Is it necessary here on Dolphin and what is suggested to do?

Thanks in advance.

Firstly - you must learn how realized fields system in dolphin. You should add another one system field for join process, and process it in validating and generating processes.

No. it is not necessary. dolphin already uses a image captcha. It uses different agles, fonts, size etc. So you don't need to worry about this.

Seems he talked about another one addition field to check humanize :) .. maybe something like question -> answer? :)