SSL certificates differ in level of verification of the applicant's data before its release and in the number of domains and subdomains for which they can be used.
Certificates are typically issued for one domain (sometimes with or without www). Certificates that allow you to protect multiple domains belong to the SAN category. One such certificate will cost less than multiple standard certificates, which makes it a suitable solution for companies with multiple websites. Wildcard certificates are used to protect an unlimited number of subdomains.
SSL certificates come in three validation types:
- DV – domain validation, encryption and protection of transferred data using the https protocol. Issued for individuals and organizations. Issuance takes up to 24 hours.
- OV – organization validation. In addition to protecting information, they guarantee that the domain belongs to a specific organization. Issued for entities with a verified phone number. Issuance takes 1–3 business days.
- EV – extended validation. EV certificates require extended validation and have become a gold standard in the finance industry. Issuance takes from 5 business days.