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[rtcweb] SDES and forking [was RE: RTCWeb Forking usecase [was RE: draft-kaplan-rtcweb-sip-interworking-requirements-00]]

Christer Holmberg <christer.holmberg@ericsson.com> Wed, 02 November 2011 10:54 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: "rtcweb@ietf.org" <rtcweb@ietf.org>
Date: Wed, 02 Nov 2011 11:54:23 +0100
Thread-Topic: SDES and forking [was RE: RTCWeb Forking usecase [was RE: draft-kaplan-rtcweb-sip-interworking-requirements-00]]
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Subject: [rtcweb] SDES and forking [was RE: RTCWeb Forking usecase [was RE: draft-kaplan-rtcweb-sip-interworking-requirements-00]]
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If using the same keys for media assocaited with all early dialogs is a security vulnerability, that is.

> -----Original Message-----
> From: rtcweb-bounces@ietf.org 
> [mailto:rtcweb-bounces@ietf.org] On Behalf Of Christer Holmberg
> Sent: 2. marraskuuta 2011 12:53
> To: rtcweb@ietf.org
> Subject: [rtcweb] SDES and forking [was RE: RTCWeb Forking 
> usecase [was RE: 
> draft-kaplan-rtcweb-sip-interworking-requirements-00]]
> 
> 
> Hi, 
> 
> > If we support SDES, the offer also contains crypto keys. Reusing 
> > crypto keys for all created connections would be a huge security 
> > vulnerability.
> 
> If using the same keys for media assocaited with all early 
> dialogs, one could, for each early dialog, send a new offer, 
> with dialog-specific SDES keys.
> 
> Yes, it would require a new offer, which I have previously 
> said I don't like. But, in this case, if you don't have to 
> change the local IP parameters/candidates etc, the new offer 
> would not trigger a ICE re-start etc.
> 
> Regards,
> 
> Christer
> _______________________________________________
> rtcweb mailing list
> rtcweb@ietf.org
> https://www.ietf.org/mailman/listinfo/rtcweb
>

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