The All In One WP Security plugin will take your website security to a whole new level. This plugin is designed and written by experts and is easy to use and understand. It reduces security risk by checking for vulnerabilities, and by implementing and enforcing the latest recommended WordPress security practices and techniques.
You can download the plugin from: https://wordpress.org/plugins/all-in-one-wp-security-and-firewall/
This is one of best and the most powerful plugin which gives highest security to your site. The plugin is so simple to use and configure. It is user friendly and SEO friendly.