The easiest, most effective way to secure WordPress in seconds.
Triagis® Security Evaluation is a simple lite-weight plugin to analyze your current WordPress installation, server for security vulnerabilities.
This Plugin is basically for changing the database default prefix(wp_) to other one.
Increase Your Website Database Security
MJP Security Tools is a plugin designed to fix a lot of WordPress security issues, as well as providing extra support.
Shantz WP Prefix Suffix is a light plugin to quickly add text/htm/css before and/or after your posts and/or pages.