SSL was originally developed by Netscape in 1994 as a way to secure communications between the client and server on the web. Later the IETF (Internet Engineering Task Force) developed a standardize protocol to provide the same functionality: TLS. TLS 1.0 was actually based off of SSL 3.0, despite this, the two are not interchangeable. The current generations of each are SSL 3.0, created in 1996 and TLS 1.2, created in 2008 (though TLS 1.0 is much more common).