Re: [Last-Call] Last Call: <draft-ietf-lamps-header-protection-20.txt> (Header Protection for Cryptographically Protected E-mail) to Proposed Standard

Thore Goebel <ietf@thore.io> Wed, 03 April 2024 08:51 UTC

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Date: Wed, 03 Apr 2024 08:51:29 +0000
To: last-call@ietf.org
From: Thore Goebel <ietf@thore.io>
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Subject: Re: [Last-Call] Last Call: <draft-ietf-lamps-header-protection-20.txt> (Header Protection for Cryptographically Protected E-mail) to Proposed Standard
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This is a way-too-late comment on draft-ietf-lamps-header-protection-20.
I'm not sure if it can still be considered, but I wanted to at least submit it.

I have a couple of concerns on things that are underspecified/ambiguous.
I have raised these here:

1. https://mailarchive.ietf.org/arch/msg/spasm/svKKPyHAGdJIjmW6P4o28iMGH30/
2. https://gitlab.com/dkg/lamps-header-protection/-/issues/63

I see the risk that if they are left unaddressed, different MUAs may implement
different things. For 2., I additionally see the risk of unexpected leakage of
private data when replying to an email with Header Protection.

Kind regards,
Thore