Certum Commercial Wildcard SSL certificate allows you to secure the main domain and an unlimited number of subdomains of the main domain, for which the Certum Commercial Wildcard SSL certificate will be generated. Additionally, this ssl certificate provides the same level of protection as standard Commercial SSL (check: Certum Commercial SSL): a guarantee of Certum, a security site seal signed by Certum and full protection with 2048/4096-bit key and 128/256-bit encryption. Thanks to Certum Commercial SSL Wildcard, you can secure multiple websites on multiple servers using only one SSL certificate.