%% You should probably cite rfc7634 instead of this I-D.
@techreport{ietf-ipsecme-chacha20-poly1305-12,
    number =    {draft-ietf-ipsecme-chacha20-poly1305-12},
    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-ipsecme-chacha20-poly1305/12/},
    author =    {Yoav Nir},
    title =     {{ChaCha20, Poly1305, and Their Use in the Internet Key Exchange Protocol (IKE) and IPsec}},
    pagetotal = 13,
    year =      2015,
    month =     jul,
    day =       9,
    abstract =  {This document describes the use of the ChaCha20 stream cipher along with the Poly1305 authenticator, combined into an AEAD algorithm for the Internet Key Exchange Protocol version 2 (IKEv2) and for IPsec.},
}