Re: [rtcweb] Asking TLS for help with media isolation
Paul Kyzivat <pkyzivat@alum.mit.edu> Fri, 04 April 2014 20:42 UTC
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Date: Fri, 04 Apr 2014 16:42:05 -0400
From: Paul Kyzivat <pkyzivat@alum.mit.edu>
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Subject: Re: [rtcweb] Asking TLS for help with media isolation
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I'm confused by this, in at least a couple of respects: - IIUC this isolation is a browser thing. If the other end doesn't have a browser then what does it mean? - Isn't the isolation supposed to be on a per-stream basis? (Or is it really on a peer-connection basis.) If it is per-stream then how does signaling it on a per-TLS basis work? - The use of DTLS to do SRTP keying is a sort of hack, since it isn't about the DTLS payload at all. I would think that whatever new you introduce into TLS for this would most naturally apply to the DTLS payload (the data channels). Thanks, Paul On 4/3/14 8:14 PM, Martin Thomson wrote: > As I described briefly at the last meeting, ensuring that media is > isolated from the application or web site is a key part of addressing > our security goals. > > The key part of that is making sure that any media that is isolated on > the sending side of RTCPeerConnection remains isolated when it reaches > the other side. > > As I noted, this is also necessary in order to ensure the integrity of > the same origin model. In that model, cross origin media is required > to be inaccessible to content, and as it stands RTCPeerConnection > could be used to work around those restrictions (implementations can > implement other protections, as Firefox already does). > > The alternatives as I see them (and I hope that this is sufficiently > exhaustive) are: > > 1. ask the TLS working group for a TLS-based solution > 2. build something into the session signaling (i.e., new SDP bits) > 3. give up on the idea > > I prefer 1 for reasons already outlined. > > I propose that we formally request the TLS working group recommend or > define a mechanism whereby we can signal in the TLS handshake that the > session contents are to be protected from access (where the > description of that protection may need to our responsibility). > > I have pointed to draft-thomson-tls-acp as a potential solution here, > but others have noted that ALPN tokens could be used. I expect that > TLS are capable of making the right decision here. > > _______________________________________________ > rtcweb mailing list > rtcweb@ietf.org > https://www.ietf.org/mailman/listinfo/rtcweb >
- [rtcweb] Asking TLS for help with media isolation Martin Thomson
- Re: [rtcweb] Asking TLS for help with media isola… Watson Ladd
- Re: [rtcweb] Asking TLS for help with media isola… Bernard Aboba
- Re: [rtcweb] Asking TLS for help with media isola… Watson Ladd
- Re: [rtcweb] Asking TLS for help with media isola… Bernard Aboba
- Re: [rtcweb] Asking TLS for help with media isola… Watson Ladd
- Re: [rtcweb] Asking TLS for help with media isola… Martin Thomson
- Re: [rtcweb] Asking TLS for help with media isola… Paul Kyzivat
- Re: [rtcweb] Asking TLS for help with media isola… Martin Thomson
- Re: [rtcweb] Asking TLS for help with media isola… Paul Kyzivat
- [rtcweb] Isolating data channels (Re: Asking TLS … Harald Alvestrand
- Re: [rtcweb] Asking TLS for help with media isola… Martin Thomson
- Re: [rtcweb] Isolating data channels (Re: Asking … Martin Thomson
- Re: [rtcweb] Isolating data channels (Re: Asking … Matthew Kaufman (SKYPE)
- Re: [rtcweb] Isolating data channels (Re: Asking … Martin Thomson
- Re: [rtcweb] Isolating data channels (Re: Asking … Harald Alvestrand
- Re: [rtcweb] Isolating data channels (Re: Asking … Martin Thomson
- Re: [rtcweb] Isolating data channels (Re: Asking … Matthew Kaufman (SKYPE)
- Re: [rtcweb] Isolating data channels (Re: Asking … Michael Tuexen
- Re: [rtcweb] Asking TLS for help with media isola… Bernard Aboba
- Re: [rtcweb] Asking TLS for help with media isola… Martin Thomson
- Re: [rtcweb] Isolating data channels (Re: Asking … Paul Kyzivat
- Re: [rtcweb] Isolating data channels (Re: Asking … Matthew Kaufman (SKYPE)
- Re: [rtcweb] Isolating data channels (Re: Asking … Mary Barnes
- Re: [rtcweb] Isolating data channels (Re: Asking … Matthew Kaufman (SKYPE)
- Re: [rtcweb] Isolating data channels (Re: Asking … Michael Thornburgh
- Re: [rtcweb] Asking TLS for help with media isola… Christer Holmberg
- Re: [rtcweb] Asking TLS for help with media isola… Dan Wing
- Re: [rtcweb] Asking TLS for help with media isola… Bernard Aboba
- Re: [rtcweb] Asking TLS for help with media isola… Martin Thomson
- Re: [rtcweb] Asking TLS for help with media isola… Dan Wing
- Re: [rtcweb] Asking TLS for help with media isola… Harald Alvestrand
- Re: [rtcweb] Asking TLS for help with media isola… Paul Kyzivat
- Re: [rtcweb] Asking TLS for help with media isola… Martin Thomson
- Re: [rtcweb] Asking TLS for help with media isola… Martin Thomson
- Re: [rtcweb] Asking TLS for help with media isola… Paul Kyzivat