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Security & Compliance

SSL/TLS

TLS encrypts data connections on the internet; SSL is its obsolete predecessor, though the term remains widely used.

TLS secures data exchanged between browsers, servers, and other services through encryption and authentication. This helps prevent transmitted information from being intercepted or altered in transit. SSL is technically obsolete, although the term is still commonly used when referring to TLS certificates and encrypted HTTPS connections. The concept is closely related to Hosting and Domain.

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FAQ

SSL/TLS

What happens when a TLS certificate expires?
Browsers show a security warning and initially block access, and many visitors leave at that point. API calls and integrations can fail as well. Expiry dates therefore belong in monitoring, and renewal should be automated. Hosting providers often renew certificates automatically, but that still needs to be verified.
How does the TLS handshake work in simplified terms?
Browser and server first agree on a protocol version and methods. The server proves its identity with a certificate, which the browser checks against trusted certificate authorities. Then a shared session key is negotiated to encrypt the actual data. This happens before any content is transferred and is usually imperceptible.
Is a TLS certificate enough to make a website secure?
No. TLS only protects the transmission between browser and server. Vulnerabilities in the application, plugins, credentials, or server configuration remain untouched. A certificate also says nothing about the trustworthiness of the operator. It is a baseline requirement, not a security strategy.
What is the difference between SSL and TLS?
TLS is the successor to SSL and fixes its security weaknesses. SSL versions are considered obsolete and should no longer be used. Anyone talking about an SSL certificate practically means a certificate for TLS connections. The old name survived as a catch-all term, but TLS is the technically correct one.