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RFC 9420
Title: The Messaging Layer Security (MLS) Protocol
Author: R. Barnes,
B. Beurdouche,
R. Robert,
J. Millican,
E. Omara,
K. Cohn-Gordon
Status: Standards Track
Stream: IETF
Date: July 2023
Mailbox: [email protected],
[email protected],
[email protected],
[email protected],
[email protected],
[email protected]
Pages: 132
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-mls-protocol-20.txt
URL: https://www.rfc-editor.org/info/rfc9420
DOI: 10.17487/RFC9420
Messaging applications are increasingly making use of end-to-end
security mechanisms to ensure that messages are only accessible to
the communicating endpoints, and not to any servers involved in
delivering messages. Establishing keys to provide such protections
is challenging for group chat settings, in which more than two
clients need to agree on a key but may not be online at the same
time. In this document, we specify a key establishment protocol that
provides efficient asynchronous group key establishment with forward
secrecy (FS) and post-compromise security (PCS) for groups in size
ranging from two to thousands.
This document is a product of the Messaging Layer Security Working Group of the
IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the
standardization state and status of this protocol. Distribution of this
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