To solve a PlusCaptcha plugin CAPTCHA, the user must rotate the circle at the center of the CAPTCHA image and reconstruct the photo to its original state.
This implies a complex mouse interaction, which most spam bots won't be able to detect and perform.
This easily separates humans from bots, protecting the site against spam messages and brute force attacks.
Unpack and upload it to the /wp-content/plugins/ directory.
Activate the plugin through the 'Plugins' menu in WordPress. Here are some key features of "PlusCaptcha":