%% You should probably cite rfc7879 instead of this I-D.
@techreport{ietf-straw-b2bua-dtls-srtp-09,
    number =    {draft-ietf-straw-b2bua-dtls-srtp-09},
    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-straw-b2bua-dtls-srtp/09/},
    author =    {Ram R and Tirumaleswar Reddy.K and Gonzalo Salgueiro and Victor Pascual and Parthasarathi Ravindran},
    title =     {{DTLS-SRTP Handling in Session Initiation Protocol (SIP) Back-to-Back User Agents (B2BUAs)}},
    pagetotal = 12,
    year =      2015,
    month =     nov,
    day =       22,
    abstract =  {Session Initiation Protocol (SIP) Back-to-Back User Agents (B2BUAs) often act on the media plane rather than just on the signaling path. This document describes the behaviour of such B2BUAs when acting on the media plane that uses an Secure Real-time Transport (SRTP) security context set up with the Datagram Transport Layer Security (DTLS) protocol.},
}