What is an SSL certificate ❓ Meaning and Types

What is SSL and Where is it used?

The SSL Certificate — A Quick Overview

  • Identity markers;
  • Site or app’s public key;
  • Domain name associated with it;
  • Linked subdomain details;
  • CA’s digital signatures;
  • Details of issuing date and validity period.
  • HTTPS in the URL in place of customary HTTP.
  • The closed padlock sign before URL. (Padlock is red or open when it is absent)

Why is SSL Certificate Essential and Who needs it?

How does it works?

  1. An SSL-secure link is enabled between the browser/server and server.
  2. The connecting browser/server requests the identity-validation data from web server.
  3. Once SSL certificate’s duplicate image is forwarded as an answer.
  4. This revet forms the basis of decision-making, on whether to trust the web server or not.
  5. If the browser/server decides finalizes that the server in questoin is trustworthy, a digital acknowledgment (confirmation) is sent back. This marks the beginning of an encrypted plus SSL-backed session.

Types of SSL certificates

Type #1: Organization Validation

  • It offers a moderate degree of validation
  • It takes a few days to activate it after applying to receive it
  • The authentication process involves humans
  • Attracts substantial cost as it involves significant resources

Type #2: Domain Validation

  • It will be granted within a few minutes
  • Least expenses as no human interface are required

Type #3: Extended Validation

  • Strict-level validation
  • Takes many weeks to be awarded
  • High costing as needed too much human involvement

Type #4: Single Domain

  • Limited utility
  • Useful for blogs and single page websites

Type #5: Multi-domain

  • Required for the organization or people owning various domains with distinct extensions
  • Up to 100 domains can be verified

Type #6: Wildcard SSL Certificates

  • Works for Unlimited domains
  • Any subdomain type is supported

How to get an SSL Certificate?

  1. Begin with setting the server and matching the WHOIS credentials with what is offered to the CA. It generally refers to details such as domain name, company name, address, address, and so on. These details should be matched.
  2. Up next is creating a CSR or Certificate Signing Request on a server with the help of a web hosting company that you’ve hired. Unless you’re highly skilled, you shouldn’t try your hand at this.
  3. The properly devised CSR should be proffered to CA for verification of the provided details.
  4. CA will cross-check the details and will grant the certificate upon successful process.
  5. Install SSL certificate and configure it on the website(s) you have got it for.
  • Certificate’s price will vary with its type;
  • Based upon the type and provider, receiving SSL can be anything from a one-minute job (e.g., for domain validation only) to a week-long affair (e.g., for an extended one).

The Final Word




CEO at Wallarm. Application security platform to prevent threats and discover vulnerabilities in a real-time.

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Ivan Novikov

Ivan Novikov

CEO at Wallarm. Application security platform to prevent threats and discover vulnerabilities in a real-time.

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