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Re: [stir] Permitted spoofing

Wilhelm Wimmreuter <wilhelm@wimmreuter.de> Wed, 12 June 2013 08:43 UTC

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From: Wilhelm Wimmreuter <wilhelm@wimmreuter.de>
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Date: Wed, 12 Jun 2013 10:43:12 +0200
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To: Dave Crocker <dhc2@dcrocker.net>
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Cc: "stir@ietf.org" <stir@ietf.org>
Subject: Re: [stir] Permitted spoofing
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For the sake of strong authentication like secure Caller-ID we definitely need object-based proof only.

This is an important distinction I guess and we shall keep that in mind.

Willi


On 11.06.2013, at 23:42, Dave Crocker wrote:

> On 6/11/2013 2:35 PM, Wilhelm Wimmreuter wrote:
>>  OK, but server authentication is definitely next.
>> DNS is the only way to reach these servers today. We are farther on the Internet than typical PSTN paradigms allow us to follow.
>> 
>>  SIP does not have decent server authentication and therefore one can pretend to be your telecom server of choice.
> 
> 
> Well...
> 
> Server authentication is needed if the model is trust via the channel.
> 
> It isn't needed if the trust goes with the data object, independent of the channel.
> 
> DNSSec and DKIM are object-based.  Of course, TLS is channel-based.
> 
> d/
> 
> -- 
> Dave Crocker
> Brandenburg InternetWorking
> bbiw.net
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