%% You should probably cite rfc6261 instead of this I-D.
@techreport{ietf-hip-over-hip-06,
    number =    {draft-ietf-hip-over-hip-06},
    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-over-hip/06/},
    author =    {Ari Keränen},
    title =     {{Encrypted Signaling Transport Modes for the Host Identity Protocol}},
    pagetotal = 13,
    year =      2011,
    month =     mar,
    day =       10,
    abstract =  {This document specifies two transport modes for Host Identity Protocol (HIP) signaling messages that allow them to be conveyed over encrypted connections initiated with the Host Identity Protocol. This document defines an Experimental Protocol for the Internet community.},
}