Wordfence Security is a free enterprise class security and performance plugin that makes your site up to 50 times faster and more secure.
iThemes Security (formerly Better WP Security) gives you over 30+ ways to secure and protect your WordPress site. On average, 30,000 new websites are hacked each day. WordPress sites can be an easy target for attacks because of plugin vulnerabilities, weak passwords and obsolete software.
McAfee SECURE show visitors your site has been tested and certified to be secure with the McAfee SECURE trustmark.