Re: [Sip] Pub request for draft-ietf-sip-dtls-srtp-framework-03

[Henry Sinnreich <hsinnrei at adobe.com>]

> Clearly, allowing lawful interception is a requirement for 3GPP, as
> is preventing "unlawful interception".

Is there a protocol mechanism for distinguishing lawful intercept from
unlawful intercept?

If yes, it would be the greatest invention since the Internet!

Henry

On 9/25/08 2:50 AM, "Schneider, Peter (NSN - DE/Munich)"
<peter.schneider at nsn.com> wrote:

>  
> 
>> -----Ursprüngliche Nachricht-----
>> Von: ext Dean Willis [mailto:dean.willis at softarmor.com]
>> Gesendet: Donnerstag, 25. September 2008 07:53
>> An: Schneider, Peter (NSN - DE/Munich)
>> Cc: ext Henry Sinnreich; sip at ietf.org
>> Betreff: Re: [Sip] Pub request for
>> draft-ietf-sip-dtls-srtp-framework-03
>> 
>> Schneider, Peter (NSN - DE/Munich) wrote:
>>> Because of
>>> the middlebox considerations 3GPP currently focusses on key
>>> management protocols that do not use the media path.
>> 
>> Translation: In order to prevent deployment of a secure system and
>> enable lawful, unlawful, and extralawful intercept, 3GPP is
>> focusing on
>> key management protocols that expose the media key via the signaling
>> plane, and on implementations that expose the signaling plane to all
>> intermediaries.
>> 
> 
> Dean, I assume that you refer to the proposal to use SDES that is discussed in
> 3GPP. However, 3GPP does not focus on that approach. Other signaling path
> solutions are discussed in 3GPP that exclude all intermediaries from access to
> the key. Clearly, allowing lawful interception is a requirement for 3GPP, as
> is preventing "unlawful interception".
> 
> The middlebox issue is NOT a pretense for allowing only weak solutions for
> 3GPP. My proposals concerning the framework draft wouldn't make DTLS-SRTP any
> weaker, right? And making DTLS-SRTP more adequate for 3GPP/TISPAN scenarios
> would be a good thing, wouldn't it?
> 
> Peter
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