SSL Fundamentals

What SSL/TLS is, how HTTPS works, certificate types, and the trust chain that keeps the web secure.

SSL/TLS certificates are the foundation of web security. They encrypt the connection between browsers and servers, authenticate website identity, and keep sensitive data safe in transit. These articles explain how certificates work, the trust chain behind them, and the different types available.

For a comprehensive overview, see our The Complete SSL/TLS Guide.

SSL vs TLS: What's the Difference?

SSL and TLS explained: the differences between protocol versions, why SSL is deprecated, and why everyone still says 'SSL' when they mean TLS.

Types of SSL Certificates: DV, OV, and EV Explained

Domain Validation, Organization Validation, and Extended Validation SSL certificates compared. Which type you need, what they cost, and what they actually prove.

SSL Certificate Chain Explained

How SSL certificate chains work: root CAs, intermediate certificates, and leaf certificates. Why chain errors break your site and how to fix them.