@techreport{wing-sipping-multipart-mixed-00,
    number =    {draft-wing-sipping-multipart-mixed-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-wing-sipping-multipart-mixed/00/},
    author =    {Dan Wing},
    title =     {{SIP Offer/Answer and Middlebox Communication with End-to-End Security}},
    pagetotal = 14,
    year =      2005,
    month =     jul,
    day =       12,
    abstract =  {This document provides a mechanism to allow middleboxes to see IP addresses, ports, and bandwidth when the session description is in an S/MIME-encrypted body.},
}