Re: [MMUSIC] Request for SDP review of draft-ietf-avtcore-rtp-scip
Christer Holmberg <christer.holmberg@ericsson.com> Sun, 12 June 2022 18:07 UTC
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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Bernard Aboba <bernard.aboba@gmail.com>, mmusic WG <mmusic@ietf.org>
CC: IETF AVTCore WG <avt@ietf.org>
Thread-Topic: [MMUSIC] Request for SDP review of draft-ietf-avtcore-rtp-scip
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Date: Sun, 12 Jun 2022 18:07:48 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mmusic/6dl1v5wIB0cQW4HAM1k2PryoktU>
Subject: Re: [MMUSIC] Request for SDP review of draft-ietf-avtcore-rtp-scip
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Hi, I have done an SDP directorate review of the draft. I have only reviewed the SDP related procedures in Sections 5.3 and 5.4. As the draft does not define any new SDP attributes etc, there is no need for any new SDP procedures. I guess my only comment/question is whether using capital letters for SHALL in Section 5.4 is correct, as the text references procedures defined elsewhere. Regards, Christer From: mmusic <mmusic-bounces@ietf.org> On Behalf Of Bernard Aboba Sent: perjantai 3. kesäkuuta 2022 20.18 To: mmusic WG <mmusic@ietf.org> Cc: IETF AVTCore WG <avt@ietf.org> Subject: [MMUSIC] Request for SDP review of draft-ietf-avtcore-rtp-scip The AVTCORE WG would like to solicit an SDP review of "RTP payload format for the SCIP codec" (draft-ietf-avtcore-rpt-scip). The document is available for inspection here: draft-ietf-avtcore-rtp-scip-01 - RTP Payload Format for the SCIP Codec<https://datatracker.ietf.org/doc/draft-ietf-avtcore-rtp-scip/> When submitting a review, please CC the AVTCORE WG (avt@ietf.org<mailto:avt@ietf.org>). As noted in the introduction, SCIP is a "pseudo-codec" that provides secure session establishment and transport over RTP. One of the goals of the document is to improve interop between SCIP endpoints and intermediaries such as SBCs and RTP relays. For example, SBCs have been observed to reject SDP Offers including SCIP, and some RTP relays have attempted to interpret or transcode SCIP RTP payloads, which is not helpful because they are encrypted and integrity protected. While SCIP is primarily used for secure audio communications, there is some experience with video (H.264) as well. In conferencing use cases, SCIP should be considered a "hop by hop" security service, in contrast to an "end to end" service such as SFrame. That is, SCIP is compatible with audio mixing or video MCU services, with the central conferencing server having access to cleartext media, thereby being considered "trusted". Note that the document has informative references to the following documents which can be made available upon request: [SCIP210] SCIP-210, "SCIP Signaling Plan", Revision 3.10, 26 October 2017, request access via email <ncia.cis3@ncia.nato.int<mailto:ncia.cis3@ncia.nato.int>>. [SCIP214] SCIP-214.2, "Secure Communication Interoperability Protocol (SCIP) over Real-time Transport Protocol (RTP)", Revision 1.1, 18 April 2014, request access via email <ncia.cis3@ncia.nato.int<mailto:ncia.cis3@ncia.nato.int>>. Bernard Aboba For the AVTCORE WG Chairs
- [MMUSIC] Request for SDP review of draft-ietf-avt… Bernard Aboba
- Re: [MMUSIC] Request for SDP review of draft-ietf… Christer Holmberg