%% You should probably cite draft-ietf-ipsecme-safecurves instead of this I-D.
@techreport{nir-ipsecme-curve25519-01,
    number =    {draft-nir-ipsecme-curve25519-01},
    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-curve25519/01/},
    author =    {Yoav Nir and Simon Josefsson},
    title =     {{New Safe Curves for IKEv2 Key Agreement}},
    pagetotal = 11,
    year =      2015,
    month =     jul,
    day =       6,
    abstract =  {This document describes the use of Curve25519 and Curve448 ("Goldilocks") for ephemeral key exchange in the Internet Key Exchange (IKEv2) protocol.},
}