Re: [Lake] Amplification reduction by optional padding to message_1 (#348)

Göran Selander <goran.selander@ericsson.com> Sun, 20 November 2022 14:56 UTC

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From: Göran Selander <goran.selander@ericsson.com>
To: "lake@ietf.org" <lake@ietf.org>
Thread-Topic: Amplification reduction by optional padding to message_1 (#348)
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Date: Sun, 20 Nov 2022 14:56:03 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/lake/Zx0WzgF6T6OoDljcrvzQu13-kxA>
Subject: Re: [Lake] Amplification reduction by optional padding to message_1 (#348)
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All,

In case you haven’t followed the discussion: The leading proposal now is to include padding in message 1 and plaintexts of messages 2/3/4 using the corresponding EAD fields.

So the optional PAD_2/3/4 goes out and in comes the optional EAD item with ead_label = 0 with ead_value of appropriate length as padding. traces-03 remains unchanged.

Details in github linked below. Further comments are welcome.

Göran

From: Göran Selander <goran.selander@ericsson.com>
Date: Thursday, 10 November 2022 at 09:10
To: lake@ietf.org <lake@ietf.org>
Subject: Amplification reduction by optional padding to message_1 (#348)
All,

We intended to discuss #348 in LAKE at IETF 115 but missed it. An ad-hoc team discussed it in London yesterday. The leading proposal is to add optional padding (? PAD_1) to message_1.

The motivation is in
https://github.com/lake-wg/edhoc/issues/348

The PR is in
https://github.com/lake-wg/edhoc/pull/357

More comments are welcome, also if you are happy with the solution.

Göran