This captcha plugin exceeded my expectations. It took several attempts at finding a captcha plugins that did not conflict with my security system and this one has been effective as well as compatible with all my plugins. Thank you.
easy to use and work perfect! just in Arithmetics captcha, the result is sometimes too big (result bigger than 40 like 28+24) it is possible to lock with smaller result max. (eg : result max 20 like 10+5)