Google reCAPTCHA uses an advanced risk analysis engine and adaptive challenges to keep malicious software from engaging in abusive activities on your website.
UserWP plugin come with anther plugin that support reCaptcha. Here's the steps to setup.
Search for UserWP reCaptcha plugin
Install and activate UserWP reCaptcha plugin
Go to google reCaptcha admin console
Find the link to google admin console under Addons tab, and click on the link.
Get key from google provider and fill into plugin settings
In google admin console, click on plus sign to add a site, then copy the keys.
Enter the site key and secret key into plugin settings
Check result on the form
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