Privacy Enhanced RTP Conferencing IETF 98 Session 2017-03-29 9:00 - 11:30 Chairs :- Richard Barnes, Suhas Nandakumar Scribe: Dan Burnett Jabber: Matt Miller Summary ------- * draft-ietf-perc-double, draft-ietf-perc-srtp-ekt-diet - Cullen presented the draft. no major open issues - Authors to submit updated draft with editorial fixes to enhance readability. - expected next version by 1st May * draft-ietf-perc-private-media-framework - No major open issues. - Authors to submit updated drafts with ++ key hierarchy explanation in perc context ++ packet format details for a double rtp packet ++ update references to dtls-id draft - expected next version by 1st May * draft-ietf-perc-dtls-tunnel, draft-jones-perc-dtls-id - Conference Id replacement with dtls-id was discussed and approved - Authors to update tunnel to refer to Martin Thomson's tls-id draft (in mmusic) - expected next version by 1st May * draft-roach-perc-webrtc - Adam discussed call flows for using perc in webrtc context - No major issues on overall direction of the draft - Next updates include: ++ consider including MD initiated callflow ++ consider removal of Offer/Answer signing and scope it to just fingerprint ++ possibly add new co-author(s) * draft-grozev-perc-double-rtx, draft-grozev-perc-ssrc - Authors discussed Rtx considerations within perc and plausible use of framemarking - Discussion on SSRC mutability and OHB extensions were proposed. - No conclusions made on either topics. Tabled till next interim * Action Items and Next Steps - Authors to submit updated version by 1st May - Chairs to setup virtual interim before June to help meet the milestones - WG to discuss double usage with Rtx/Fec at the interim Raw Notes (Dan Burnett) Chairs Introduction (https://www.ietf.org/proceedings/98/slides/slides-98-perc-chairs-deck-00.pdf) No milestone changes since IETF 97. No changes to agenda. Paul Jones DTLS Tunnel draft-ietf-perc-dtls-tunnel (https://www.ietf.org/proceedings/98/slides/slides-98-perc-dtls-tunnel-00.pdf) Discussion about the final point on Tunnel Affinity slide (slide 4) -- concerns with assuming same-name key servers can all receive messages for a given DTLS association. Cullen suggests defining id that names kd pool and md pool as context. Slide 6: EKR suggests type before length. Paul Jones DTLS Id in TLS/DTLS draft-jones-perc-dtls-id (https://www.ietf.org/proceedings/98/slides/slides-98-perc-dtls-id-00.pdf) Slide 5: MD needs to be able to read the dtls_id. No in-room concerns with using this in place of the conference id, etc. Plan to refer to Martin's document in MMUSIC. Adam Roach Perc in WebRTC Context draft-roach-perc-webrtc (https://www.ietf.org/proceedings/98/slides/slides-98-perc-webrtc-00.pdf) Slide 8: Adam notes that some of this content will obviously change as a result of the id discussion we just had. Slide 9: Adam notes that these flows are illustrative only and not normative or comprehensive. We convey a name back to the client so he can do a cert check. Slide 16: Long discussion. Adam will rework how the MD asserts the KD's identity. Slide 30: It was pointed out that this is like a Peer Connection that does not do media. The permission and acces needs are essentially the same. Slide 32: Show of hands in room for continuing work like this? Good support in the room. Cullen Jennings Ekt on Diet draft-ietf-perc-srtp-ekt-diet (https://www.ietf.org/proceedings/98/slides/slides-98-perc-ekt_on_diet-00.pdf) Code point change slide: no one obects to the change from 3 to 2 for aeskw_256. (some decision that I didn't catch about what EKR wanted here, Richard to fill in) Cullen Jennings SRTP Double Encryption draft-ietf-perc-double (https://www.ietf.org/proceedings/98/slides/slides-98-perc-srtp_double-00.pdf) EKR wants to bring up structure of OHB. Cullen thinks the client should always insert. EKR wants us to be precise on the syntax/structure as well as describing what the purpose/allowed uses of it are. Cullen will restrict the use to be for statistics reports. David Benham Perc Media Framework draft-ietf-perc-private-media-framework (https://www.ietf.org/proceedings/98/slides/slides-98-perc-private_media_framework-00.pdf) No discussion or decisions. Emil Ivov Perc RTX Considerations TBD Slide 6: An important point raised is that this is not just about padded (fake) packets, but rather about how to handle repair streams that may need to be intercepted at the hop level. But Emil says we still need to indicate/handle discardable packets. Lots more discussion about how repair streams work. Decision is to have a focused call on this topic. Slide 9: A point was made that SFUs could also switch among the timestamps rather than creating a new one. TBD TBD/Chair Wrap up TBD Chairs ask which docs need more work before Last Call. The answer is most of them. Target given by chairs is that authors will update their docs by May so we can Last Call by June.