Re: [rtcweb] Let's define the purpose of WebRTC

Hadriel Kaplan <HKaplan@acmepacket.com> Mon, 07 November 2011 03:20 UTC

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From: Hadriel Kaplan <HKaplan@acmepacket.com>
To: Eric Rescorla <ekr@rtfm.com>
Thread-Topic: [rtcweb] Let's define the purpose of WebRTC
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Date: Mon, 7 Nov 2011 03:20:26 +0000
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Subject: Re: [rtcweb] Let's define the purpose of WebRTC
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On Nov 6, 2011, at 9:38 AM, Eric Rescorla wrote:

> Hmm... I I don't see any
> reason to allow insecure calling from one WebRTC client to another.
> It's a different question whether one should allow insecure calling
> to legacy clients.

Agreed.


>> IMHO, if a web service doesn't want to take, or cannot take, the hit
>> for SRTP, WebRTC is not the appropriate solution for such a service.
> 
> I'm exceedingly unsympathetic to the claim that SRTP is too slow. This
> is precisely the claim that was made about TLS for years, but measurements
> (see Langley and Modadugu's Overclocking SSL talk at Velocity) show
> that that's not really true.

Who said "too slow"?  There *is* an extra round-trip or two involved I presume, if we're talking DTLS-SRTP, but no I didn't mean that as a "hit".  I just meant the extra computing cycles for SRTP being a "hit".  For WebRTC-to-WebRTC I don't think that matters at all.  For WebRTC-to-media-server it might, for a free game app or greeting card app that don't care about it to begin with, and which use plaintext HTTP to begin with.

(this isn't a big deal regardless - just something to think about whether we care or not)

-hadriel