%% You should probably cite rfc9172 instead of this I-D.
@techreport{ietf-dtn-bpsec-02,
    number =    {draft-ietf-dtn-bpsec-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-ietf-dtn-bpsec/02/},
    author =    {Edward J. Birrane and Kenneth McKeever},
    title =     {{Bundle Protocol Security Specification}},
    pagetotal = 34,
    year =      2016,
    month =     jul,
    day =       7,
    abstract =  {This document defines a security protocol providing end to end data integrity and confidentiality services for the Bundle Protocol.},
}