Comodo SGC Wildcard
Secure unlimited sub-domains on your website with a single Comodo SGC Wildcard SSL Certificate (e.g. www.yourdomain.com, secure.yourdomain.com, signup.yourdomain.com). A Comodo SGC Wildcard SSL C ertificate is a cost effective and efficient means of securing all sub-domains without the need to manage multiple certificates.
More Info at http://www.sslcerts247.com/comodo/ssl-certificate-sgc-wildcard
