%% You should probably cite rfc8002 instead of this I-D.
@techreport{ietf-hip-rfc6253-bis-00,
    number =    {draft-ietf-hip-rfc6253-bis-00},
    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-hip-rfc6253-bis/00/},
    author =    {Tobias Heer and Samu Varjonen},
    title =     {{Host Identity Protocol Certificates}},
    pagetotal = 11,
    year =      2013,
    month =     apr,
    day =       1,
    abstract =  {The CERT parameter is a container for digital certificates. It is used for carrying these certificates in Host Identity Protocol (HIP) control packets. This document specifies the certificate parameter and the error signaling in case of a failed verification. Additionally, this document specifies the representations of Host Identity Tags in X.509 version 3 (v3) and SPKI certificates. The concrete use of certificates including how certificates are obtained, requested, and which actions are taken upon successful or failed verification are specific to the scenario in which the certificates are used. Hence, the definition of these scenario- specific aspects are left to the documents that use the CERT parameter. This document updates RFC 5201.},
}