With the project PHP Certificate Authority, you could be doing a better job of website security... If only there was a simple way to implement SSL with signed keys? PHP-CA is an easy to use and easy to administer Certificate Authority that runs in PHP.

PHPki Digital Certificate Authority is an Open Source Web application for managing a multi-agency PKI for HIPAA compliance.With PHPki, you may create and centrally manage X.509 certificates for use with S/MIME enabled e-mail clients, SSL servers, and VPN applications.