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The difference between SSL and TLS

2024-01-27 09:33:42

If you've been doing any research into SSL certificates you've probably come across the term TLS certificates. How are they different? Today we'll let you in on a little secret: these days, they're the same thing. If anything, TLS certificate is a more accurate name for what we call SSL certificates. However, SSL has become the catch-all industry brand name. Confused? We'll explain.

TLS is short for Transport Layer Security and it is the cryptographic protocol that is enabled when an SSL certificate is installed on your site. The TLS protocol is what ensures the connection between a client and your server is encrypted. So why do we call them SSL certificates?

The simple answer is when SSL certificates were first created (way back in 1995), they did use the Secure Sockets Layer protocol to create encrypted connections. But, as with many technologies used on the Internet, it was phased out over time. SSL had many security flaws, so a better encryption protocol was created to replace it: TLS. Use of the SSL protocol has been deprecated since 2015, and there have been many iterations of TLS over the past two decades, with the protocol improving and strengthening with each one. Currently, the TLS standard across the web is TLS version 1.3.