Re-sending because the original message bounced back (complaining about draft-ietf-mmusic-msid-13.all at ietf.org email). Regards,  Rifaat ---------- Forwarded message ---------- From: Rifaat Shekh-Yusef < rifaat.ietf at gmail.com > Date: Fri, May 13, 2016 at 10:38 AM Subject: [secdir] SecDir review of draft-ietf-mmusic-msid-13 To: The IESG < iesg at ietf.org >, secdir at ietf.org , draft-ietf-mmusic-msid-13.all at ietf.org I have reviewed this document as part of the security directorate's ongoing effort to review all IETF documents being processed by the IESG.  These comments were written primarily for the benefit of the security area directors.  Document editors and WG chairs should treat these comments just like any other last call comments. Summary: Ready This is a Standard Track document that defines an RTP media streams grouping mechanism in SDP. The Security Consideration section clearly describes the potential attacks  introduced by this new mechanism, and points out the general issue of SDP  modification by untrusted entities, and potential issue with the buffering  required by mechanism suggested by the draft. Regards,  Rifaat