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The Messaging Layer Security (MLS) Federation

The information below is for an old version of the document.
Document Type
This is an older version of an Internet-Draft whose latest revision state is "Active".
Expired & archived
Authors Emad Omara , Raphael Robert
Last updated 2020-03-14 (Latest revision 2019-09-11)
Replaces draft-omara-mls-federation
RFC stream Internet Engineering Task Force (IETF)
Additional resources Mailing list discussion
Stream WG state WG Document
Document shepherd (None)
IESG IESG state Expired
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


This document describes how the Messaging Layer Security (MLS) can be used in a federated environment where different MLS implementations can interoperate by defining the message format for user key retrieval. The document also describes some use cases where federation could be useful.


Emad Omara
Raphael Robert

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)