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SSL certificates > 1 - Features of SSL Certificates > Features and costs of SSL Certificates

1.1 Features and costs of SSL Certificates

SSL (Secure Sockets Layer) is the name of the protocol used to establish secure communication between a Server and a Client, without data (such as passwords, personal details and credit card numbers) being intercepted, tampered with or falsified.
To ensure secure browsing, where the data is protected, a suitable SSL Server certificate, issued by a trusted third party (Certification Authority), needs to be installed.

The differences between the three types of SSL Certificate (DV, OV, EV) relate to the different validation process. Each one has its own verification levels: 

 


This confirms that the applicant owns or controls the domain. A DV SSL Certificate contains the domain's common name.
It can be issued in the following ways:
  • Single Host: valid for a single domain name (e.g. "domainname.extension");
  • Wildcard: valid for one domain name (e.g. "domainname.extension") and all of its subdomains, usually in the format *.domainname.extension (e.g. "shop.domainname.extension", "login.domainname.extension", etc.);
  • SAN (Subject Alternative Name): valid for a maximum of 5 different domain names (e.g. "domainname.extension", "domainname1.extension", "domainname2.extension", etc.).
 


This requires the same checks as for the DV Certificate, plus verification of the company that owns the domain. An OV SSL Certificate also contains information about the applicant's organization.
It can be issued in the following ways:
  • Single Host: valid for a single domain name (e.g. "domainname.extension");
  • Wildcard: valid for one domain name (e.g. "domainname.extension") and all of its subdomains, usually in the format *.domainname.extension (e.g. "shop.domainname.extension", "login.domainname.extension", etc.);
  • SAN (Subject Alternative Name): valid for a maximum of 5 different domain names (e.g. "domainname.extension", "domainname1.extension", "domainname2.extension", etc.).
 


This certificate offers the highest level of reliability. In addition to the checks carried out for the OV, for an EV SSL certificate, the CA carries out more in-depth checks, ensuring, for example, that the request comes from a person authorized to represent the organization.
It can be issued in the following ways:
  • Single Host: valid for a single domain name (e.g. "domainname.extension");
  • SAN (Subject Alternative Name): valid for a maximum of 5 different domain names (e.g. "domainname.extension", "domainname1.extension", "domainname2.extension", etc.).

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