Wildcard SSL certificates are the most convenient way to provide SSL protection and encryption across a set of sites that share the same base domain. Wildcard certificates are fully compliant X.509 certificates and can offer the strongest possible key sizes and encryption strength available in SSL certificates. Wildcard certificates are available in both Domain Validated (DV) and Organization Validated (OV) authentication levels.
Protect all your subdomains with one wildcard certificate
Purchase one high-powered Wildcard SSL certificate and easily use it for all your sub domains that share the same base domain. For example, a Wildcard cert for *.color.com will work for the following subdomains.
A Wildcard SSL certificate is engineered to secure an unlimited number of subdomains. Wildcard SSL takes the work out of managing dozens of single-domain SSL certificates. You’re totally free to add additional sub domains at any time during the life-cycle of the certificate.
Every Wildcard cert begins with an asterisk * (or star). The star represents the wildcard part of the SSL certificate. The star can be any valid subdomain that shares the same base domain. All fully-qualified-domains using a Wildcard must share the same base domain.