@techreport{wing-sipping-srtp-key-04,
    number =    {draft-wing-sipping-srtp-key-04},
    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-srtp-key/04/},
    author =    {Dan Wing and Francois Audet and Steffen Fries and Hannes Tschofenig and Alan Johnston},
    title =     {{Secure Media Recording and Transcoding with the Session Initiation Protocol}},
    pagetotal = 25,
    year =      2008,
    month =     oct,
    day =       31,
    abstract =  {Call recording is an important feature in enterprise telephony applications. Some industries such as financial traders have requirements to record all calls in which customers give trading orders. This poses a particular problem for Secure RTP systems as many SRTP key exchange mechanisms do not disclose the SRTP session keys to intermediate SIP proxies. As a result, these key exchange mechanisms cannot be used in environments where call recording is needed. This document specifies a secure mechanism for a cooperating endpoint to disclose its SRTP master keys to an authorized party to allow secure call recording.},
}