Google No CAPTCHA reCAPTCHA
Adding the new reCAPTCHA is easy and gives you added protection against spam registration attempts and brute force login attempts. To start using reCAPTCHA, from your WordPress dashboard navigate to iThemes Security>Pro Tab and go to the reCAPTCHA section.
After you enable the feature, you will need to get Site and Secret Keys from Google. From your iThemes Security dashboard you can click the blue Google reCAPTCHA link to obtain your keys.
To get the keys needed to activate reCAPTCHA just go to google.com/recaptcha and log in with your Google credentials. Then you will register a new site.
You can add reCAPTCHA to three of your most vulnerable areas.