The SSL certificates with domain verification , or as some call them, the entry-level certificates are the most common in the world, and this is not surprising, because the emission rate of these certificates varies from 2-10 minutes, depending on the brand . To obtain a certificate of this type, no documents are required, the whole process is extremely simple, you need to confirm domain ownership, and for this there are 3 ways, one main and two alternatives.
Entry-level SSL certificates with domain verification are one of the fastest-issued types of certificates because they require no documents. We recommend these certificates for small sites and small projects, when you don’t need a lot of trust from customers and visitors to the site, project.
With a certificate of this type, static security logos are most often used, however there are some that offer dynamic logos, for example: Thawte SSL 123, Sectigo SSL Certificate.
Here is a brief overview of the verification methods available for domain validation certification.
Validation via email (DCV Email)
This method is described on many sites and blogs, the point is that the certification authority will send you a verification letter in which there will be a link to confirm ownership of the domain. This letter can be sent either to the e-mail address specified in the Whois of your domain, or to one of the five gilded ones: admin @, administrator @, hostmaster @, postmaster @, webmaster @
Validation via DNS CNAME
A fairly popular method, for those who do not have a mail server configured, and whois emails are closed with private registration. The bottom line is simple, you have to make a special entry in your DNS, and the certification authority will check it. The method is completely automatic.
Validation via a Hash file (HTTP CSR Hash Hash)
An even simpler method is that you will be provided with a special .txt file that you will have to upload to your server, the certification authority will check its availability and a certificate will be issued . The method is completely automatic.