%% You should probably cite draft-ietf-idr-bgp-tcp-md5 instead of this I-D.
@techreport{heffernan-tcp-md5-02,
    number =    {draft-heffernan-tcp-md5-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-heffernan-tcp-md5/02/},
    author =    {Andy Heffernan},
    title =     {{TCP MD5 Signature Option}},
    pagetotal = 4,
    year =      1996,
    month =     oct,
    day =       1,
    abstract =  {This memo describes a TCP extension to enhance security for selected TCP applications. It defines a new TCP option for carrying an MD5 digest in a TCP segment. This digest acts like a signature for that segment, incorporating information known only to the connection end points. Using this option in the way described in this paper significantly reduces the danger from security attacks on critical TCP applications on the Internet. This document specifies an experimental protocol for use in the Internet.},
}