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Re: [rtcweb] SDP Security Descriptions (RFC 4568) and RTCWeb

Martin Thomson <martin.thomson@gmail.com> Thu, 25 April 2013 23:40 UTC

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Date: Thu, 25 Apr 2013 16:40:47 -0700
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From: Martin Thomson <martin.thomson@gmail.com>
To: Randell Jesup <randell-ietf@jesup.org>
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Subject: Re: [rtcweb] SDP Security Descriptions (RFC 4568) and RTCWeb
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On 25 April 2013 16:33, Randell Jesup <randell-ietf@jesup.org> wrote:
> SDES is basically "protect against WiFi sniffers" encryption.

I wondered when this characterization would resurface.  It's a really
bad one.  SDES protects your communications from everyone except the
website and anyone they choose to send it to.  It's no different to
using DTLS-SRTP to send data directly to a server that presents the
sites domain certificate.  It's exactly equivalent to allowing
getUserMedia with peerIdentity constraint (and that other one I can't
ever remember the name of).

Whether this is acceptable depends on your threat model.

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