%% You should probably cite draft-ietf-ipsecme-chacha20-poly1305 instead of this I-D.
@techreport{nir-ipsecme-chacha20-poly1305-02,
    number =    {draft-nir-ipsecme-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-nir-ipsecme-chacha20-poly1305/02/},
    author =    {Yoav Nir},
    title =     {{ChaCha20 and Poly1305 and their use in IPsec}},
    pagetotal = 7,
    year =      2014,
    month =     mar,
    day =       31,
    abstract =  {This document describes the use of the ChaCha20 stream cipher along with the Poly1305 authenticator, combined into an AEAD algorithm for IPsec.},
}