%% You should probably cite rfc7905 instead of this I-D.
@techreport{ietf-tls-chacha20-poly1305-02,
    number =    {draft-ietf-tls-chacha20-poly1305-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-tls-chacha20-poly1305/02/},
    author =    {Adam Langley and Wan-Teh Chang and Nikos Mavrogiannopoulos and Joachim Strombergson and Simon Josefsson},
    title =     {{ChaCha20-Poly1305 Cipher Suites for Transport Layer Security (TLS)}},
    pagetotal = 7,
    year =      2015,
    month =     nov,
    day =       6,
    abstract =  {This document describes the use of the ChaCha stream cipher and Poly1305 authenticator in the Transport Layer Security (TLS) and Datagram Transport Layer Security (DTLS) protocols.},
}