%% You should probably cite rfc6978 instead of this I-D.
@techreport{touch-tcp-ao-nat-05,
    number =    {draft-touch-tcp-ao-nat-05},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-touch-tcp-ao-nat/05/},
    author =    {Dr. Joseph D. Touch},
    title =     {{A TCP Authentication Option Extension for NAT Traversal}},
    pagetotal = 6,
    year =      2013,
    month =     may,
    day =       23,
    abstract =  {This document describes an extension to the TCP Authentication Option (TCP-AO) to support its use over connections that pass through Network Address Translators and/or Network Address and Port Translators (NATs/NAPTs). This extension changes the data used to compute traffic keys, but it does not alter TCP-AO's packet processing or key generation algorithms.},
}