%% You should probably cite draft-pep-general instead of this I-D.
@techreport{birk-pep-00,
    number =    {draft-birk-pep-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-birk-pep/00/},
    author =    {Volker Birk and Hernâni Marques and S. Shelburn and Sandro Koechli},
    title =     {{pretty Easy privacy (pEp): Privacy by Default}},
    pagetotal = 21,
    year =      2017,
    month =     jun,
    day =       29,
    abstract =  {Building on already available security formats and message transports (like PGP/MIME for email), pretty Easy privacy (pEp) describes protocols to automatize operations (key management, key discovery, private key handling including peer-to-peer synchronization of private keys and other user data across devices) that have been seen to be barriers to deployment of end-to-end secure interpersonal messaging. pEp also introduces "Trustwords" (instead of fingerprints) to verify communication peers and proposes a trust rating system to denote secure types of communications and signal the privacy level available on a per-user and per-message level. In this document, the general design choices and principles of pEp are outlined.},
}