If you need to secure two, three or more domain names with the same certificate, a Multi-domain SSL Certificate is the best choice for you.
EV Multi-Domain SSL
You may also purchase a separate SSL certificate for each of your domains, though you might need to purchase a separate Dedicated IP address for each of them as well.
Please note: Your current hosting provider might not accept third-party SSL certificates (Multi-Domain certificates in particular). We strongly recommend that you contact your hosting provider before purchasing an SSL certificate from us.