%% You should probably cite draft-ietf-mls-architecture instead of this I-D.
@techreport{omara-mls-architecture-01,
    number =    {draft-omara-mls-architecture-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-omara-mls-architecture/01/},
    author =    {Emad Omara and Benjamin Beurdouche and Eric Rescorla and Srinivas Inguva and Albert Kwon and Alan Duric},
    title =     {{Messaging Layer Security Architecture}},
    pagetotal = 16,
    year =      2018,
    month =     feb,
    day =       7,
    abstract =  {This document describes the architecture and requirements for the Messaging Layer Security (MLS) protocol. MLS provides a security layer for group messaging applications with from two to a large number of clients. It is meant to protect against eavesdropping, tampering, and message forgery.},
}