EV (Extended Validation) is a type of certificate with the highest class of protection, which is actively used in online business. To register it, it is necessary to go through the extended verification procedure, confirm the legality of the organization and the ownership of the domain.
IDN (Internationalized Domain Names) is an SSL certificate option that can be purchased to support national domains, for example САЙТ.РФ, БАЛАЛАР.ҚАЗЕ.
SGC (Server Gated Cryptography) is a technology that provides security to users using outdated browsers.
You can learn more about all types of SSL and their abbreviations in the article.