SSL certificate secure information from an outsider by guaranteeing secure connection/association between a server and a browser. In any case, with regards to securing all sub-domains alongside fundamental domain, Wildcard SSL certificate is required. Workings of both the certificate , i.e. SSL Certificate and also Wildcard SSL Certificate is nearly the same with just a single real contrast and that is Wildcard SSL Certificate gives security to main domain as well as, to all other sub-domain connected to the primary domain regardless of SSL Certificate, which gives security to just the main domain.
Working of Wildcard SSL Certificate
When an organization applies for Wildcard SSL Certificate, it means that it owns multiple website or sub domains.
When CA (Certification Authority) issues a certificate, organization must ensure that all sub domains are associated with the main domain else it will affect the level of security.
Once the validation of the domain and the sub domain is checked, Wildcard SSL Certificate will provide the same level of security to the main domain and all other sub domains associated with it.
Wildcard SSL Certificate will look for all the possible sub domain names and will provide security to them. For example, a Wildcard SSL Certificate is issued to *.mybusiness.com, where ‘*’ represents all the sub domains associated with the main domain and in return Wildcard SSL Certificate will provide security to all the possible sub domains suffixed ‘.mybusiness.com’
Difference between SSL Certificate and Wildcard SSL Certificate
If you get a Wildcard SSL Certificate, for this particular site, then it will not only secure this particular URL but also, all other sub-domains like blog.mybusiness.com, shop.mybusiness.com, onlinestore.mybusiness.com etc., provided these sub-domains are linked with the main domain. Whereas, a regular SSL Certificate normally secures single fully qualified domain name. In short, if you own or manage multiple sites/pages that exist on the same domain/ main domain, Wildcard SSL Certificate is what you need for a complete internet security and at a better price.