TLS, aka Transport Layer Security, is a protocol created in 1999.
Transport Layer Security (TLS) and its predecessor, Secure Sockets Layer (SSL), are cryptographic protocols that provide communications security over a computer network. Several versions of the protocols find widespread use in applications such as web browsing, email, Internet faxing, instant messaging, and Voice over IP (VoIP). Websites are able to use TLS to secure all communications between their servers and web browsers. Read more on Wikipedia...