Re: [MBONED] Adoption Call: draft-jholland-mboned-ambi-04

"Manfredi (US), Albert E" <albert.e.manfredi@boeing.com> Mon, 09 March 2020 01:13 UTC

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From: "Manfredi (US), Albert E" <albert.e.manfredi@boeing.com>
To: "mboned@ietf.org" <mboned@ietf.org>
Thread-Topic: [MBONED] Adoption Call: draft-jholland-mboned-ambi-04
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Date: Mon, 9 Mar 2020 01:13:24 +0000
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Subject: Re: [MBONED] Adoption Call: draft-jholland-mboned-ambi-04
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On Mon, Jan 27, 2020, 10:31 Greg Shepherd <mailto:gjshep@gmail.com> wrote:
MBONED, 

> We had support in the room in Singapore for adoption. Time to take it to the list. Please read and respond w/ or w/o support to this thread.
>
> https://tools.ietf.org/html/draft-jholland-mboned-ambi-04

If the manifests, in AMBI's current incarnation, are unicast, then why bother with the multicast stream at all? Why not unicast the data in authenticated or encrypted packets, the same way as the manifests have to be unicast?

Conversely, for authenticated or encrypted multicast traffic, is it not simpler to use a symmetric key stream cipher, with wide enough packet sequence numbers to permit the new secret key to be sent to all multicast group members, out of band, at a relatively low rate? If you can show that the sequence number never repeats, with a given secret key, you're done. Let's say, update the secret key daily, using any low data rate key exchange protocol.

Bert