%% You should probably cite rfc3323 instead of this I-D.
@techreport{ietf-sip-privacy-general-01,
    number =    {draft-ietf-sip-privacy-general-01},
    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-sip-privacy-general/01/},
    author =    {Jon Peterson},
    title =     {{A Privacy Mechanism for the Session Initiation Protocol (SIP)}},
    pagetotal = 22,
    year =      2002,
    month =     jun,
    day =       7,
    abstract =  {This document defines new mechanisms for the Session Initiation Protocol (SIP) in support of privacy. Specifically, guidelines are provided for the creation of messages that do not divulge personal identity information. A new 'privacy service' logical role for intermediaries is defined to answer some privacy requirements that user agents cannot satisfy themselves. Finally, means are presented by which a user can request particular functions from a privacy service.},
}