This is the home page for the TLS WG; it's maintained IETF TLS Working Group.

What is TLS?

The TLS protocols allows client/server applications to communicate over the Internet in a way that is designed to prevent eavesdropping, tampering, and message forgery. TLS is the connection-oriented verions and DTLS is the connectionless-oriented variant; (D)TLS is used to refer to both protocols.

See our charter for more details of the scope of the work. Additionally, you can also check our Frequently Asked Questions.

Working Specifications

TLS has been revised a number of times, but the current specifications we are working on are:

Older Specifications

The previous versions of TLS and DTLS can be found at:


We track known implementations of TLS and DTLS 1.3 on our wiki.