%% You should probably cite draft-ietf-ipsecme-chacha20-poly1305 instead of this I-D.
@techreport{nir-ipsecme-chacha20-poly1305-01,
    number =    {draft-nir-ipsecme-chacha20-poly1305-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-nir-ipsecme-chacha20-poly1305/01/},
    author =    {Yoav Nir},
    title =     {{ChaCha20 and Poly1305 and their use in IPsec}},
    pagetotal = 8,
    year =      2014,
    month =     feb,
    day =       4,
    abstract =  {This document describes the use of the ChaCha20 stream cipher in IPsec, as well as the use of the Poly1305 authenticator, both as stand-alone algorithms, and as a combined mode AEAD algorithm.},
}