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Re: [ntpwg] Fwd: Early Allocations for NTS drafts from the IETF NTP Working Group

Harlan Stenn <stenn@ntp.org> Tue, 15 March 2016 02:55 UTC

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From: Harlan Stenn <stenn@ntp.org>
To: Hal Murray <hmurray@megapathdsl.net>
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Comments: In-reply-to Hal Murray <hmurray@megapathdsl.net> message dated "Mon, 14 Mar 2016 15:06:44 -0700."
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Date: Tue, 15 Mar 2016 02:52:57 +0000
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Subject: Re: [ntpwg] Fwd: Early Allocations for NTS drafts from the IETF NTP Working Group
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Hal Murray writes:
> 
> stenn@ntp.org said:
> > If that's not OK for some people, that's great.  The instant solution for
> > these folks is to use symmetric keys with the traditional MAC to protect
> > packet contents before NTS can provide a MAC itself. 
> 
> If I have symmetric keys, why would I bother with NTS?

I have no strong opinion on this.

> Is there some crypto argument about changing keys after using a key on X 
> bytes of data?  If so, what is X and/or how does that translate to something 
> like years of NTP traffic?

I have no strong opinion on this.

H
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