%% You should probably cite rfc8247 instead of this I-D.
@techreport{ietf-ipsecme-rfc4307bis-03,
    number =    {draft-ietf-ipsecme-rfc4307bis-03},
    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-rfc4307bis/03/},
    author =    {Yoav Nir and Tero Kivinen and Paul Wouters and Daniel Migault},
    title =     {{Algorithm Implementation Requirements and Usage Guidance for IKEv2}},
    pagetotal = 14,
    year =      2016,
    month =     feb,
    day =       9,
    abstract =  {The IPsec series of protocols makes use of various cryptographic algorithms in order to provide security services. The Internet Key Exchange protocol provides a mechanism to negotiate which algorithms should be used in any given Security Association. To ensure interoperability between different implementations, it is necessary to specify a set of algorithm implementation requirements and Usage guidance to ensure that there is at least one algorithm that all implementations will have available. This document defines the current algorithm implementation requirements and usage guidance of IKEv2. This document does not update the algorithms used for packet encryption using IPsec Encapsulated Security Payload (ESP)},
}