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Re: [lamps] I-D Action: draft-ietf-lamps-e2e-mail-guidance-01.txt

Daniel Kahn Gillmor <dkg@fifthhorseman.net> Tue, 25 January 2022 18:58 UTC

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From: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
To: spasm@ietf.org
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References: <164307100871.19181.11588373375019903650@ietfa.amsl.com>
Autocrypt: addr=dkg@fifthhorseman.net; prefer-encrypt=mutual; keydata= mDMEX+i03xYJKwYBBAHaRw8BAQdACA4xvL/xI5dHedcnkfViyq84doe8zFRid9jW7CC9XBiI0QQf FgoAgwWCX+i03wWJBZ+mAAMLCQcJEOCS6zpcoQ26RxQAAAAAAB4AIHNhbHRAbm90YXRpb25zLnNl cXVvaWEtcGdwLm9yZ/tr8E9NA10HvcAVlSxnox6z62KXCInWjZaiBIlgX6O5AxUKCAKbAQIeARYh BMKfigwB81402BaqXOCS6zpcoQ26AADZHQD/Zx9nc3N2kj13AUsKMr/7zekBtgfSIGB3hRCU74Su G44A/34Yp6IAkndewLxb1WdRSokycnaCVyrk0nb4imeAYyoPtBc8ZGtnQGZpZnRoaG9yc2VtYW4u bmV0PojRBBMWCgCDBYJf6LTfBYkFn6YAAwsJBwkQ4JLrOlyhDbpHFAAAAAAAHgAgc2FsdEBub3Rh dGlvbnMuc2VxdW9pYS1wZ3Aub3JnL0Gwxvypz2tu1IPG+yu1zPjkiZwpscsitwrVvzN3bbADFQoI ApsBAh4BFiEEwp+KDAHzXjTYFqpc4JLrOlyhDboAAPkXAP0Z29z7jW+YzLzPTQML4EQLMbkHOfU4 +s+ki81Czt0WqgD/SJ8RyrqDCtEP8+E4ZSR01ysKqh+MUAsTaJlzZjehiQ24MwRf6LTfFgkrBgEE AdpHDwEBB0DkKHOW2kmqfAK461+acQ49gc2Z6VoXMChRqobGP0ubb4kBiAQYFgoBOgWCX+i03wWJ BZ+mAAkQ4JLrOlyhDbpHFAAAAAAAHgAgc2FsdEBub3RhdGlvbnMuc2VxdW9pYS1wZ3Aub3Jnfvo+ nHoxDwaLaJD8XZuXiaqBNZtIGXIypF1udBBRoc0CmwICHgG+oAQZFgoAbwWCX+i03wkQPp1xc3He VlxHFAAAAAAAHgAgc2FsdEBub3RhdGlvbnMuc2VxdW9pYS1wZ3Aub3JnaheiqE7Pfi3Atb3GGTw+ jFcBGOaobgzEJrhEuFpXREEWIQQttUkcnfDcj0MoY88+nXFzcd5WXAAAvrsBAIJ5sBg8Udocv25N stN/zWOiYpnjjvOjVMLH4fV3pWE1AP9T6hzHz7hRnAA8d01vqoxOlQ3O6cb/kFYAjqx3oMXSBhYh BMKfigwB81402BaqXOCS6zpcoQ26AADX7gD/b83VObe14xrNP8xcltRrBZF5OE1rQSPkMNy+eWpk eCwA/1hxiS8ZxL5/elNjXiWuHXEvUGnRoVj745Vl48sZPVYMuDgEX+i03xIKKwYBBAGXVQEFAQEH QIGex1WZbH6xhUBve5mblScGYU+Y8QJOomXH+rr5tMsMAwEICYjJBBgWCgB7BYJf6LTfBYkFn6YA CRDgkus6XKENukcUAAAAAAAeACBzYWx0QG5vdGF0aW9ucy5zZXF1b2lhLXBncC5vcmcEAx9vTD3b J0SXkhvcRcCr6uIDJwic3KFKxkH1m4QW0QKbDAIeARYhBMKfigwB81402BaqXOCS6zpcoQ26AAAX mwD8CWmukxwskU82RZLMk5fm1wCgMB5z8dA50KLw3rgsCykBAKg1w/Y7XpBS3SlXEegIg1K1e6dR fRxL7Z37WZXoH8AH
Date: Tue, 25 Jan 2022 11:54:50 -0500
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Subject: Re: [lamps] I-D Action: draft-ietf-lamps-e2e-mail-guidance-01.txt
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On Mon 2022-01-24 16:36:48 -0800, internet-drafts@ietf.org wrote:
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> This draft is a work item of the Limited Additional Mechanisms for PKIX and SMIME WG of the IETF.
>
>         Title           : Guidance on End-to-End E-mail Security
>         Author          : Daniel Kahn Gillmor
> 	Filename        : draft-ietf-lamps-e2e-mail-guidance-01.txt
> 	Pages           : 29
> 	Date            : 2022-01-24

This update mainly adds a bit of text about common ways that MUAs think
about the message's "main body" (the part represented to the user as the
text of the e-mail) and "attachments".  These concepts are useful in
thinking about e2e encrypted messages.

For example, how do cryptographic protections apply to the different
parts if they are wrapped in different cryptographic layers?  the
argument is that the entire message should be under one uniform
cryptographic envelope.

The idea of which parts might be the "main body" part for different
renderers may also be useful in the ongoing header protection work that
Bernie and Alexey and I are working on (more on that soon, hopefully).

From the document's changelog:

-----
### Substantive changes from draft-ietf-...-00 to draft-ietf-...-01

- Added section about distinguishing Main Body Parts and Attachments
- Updated document considerations section, including reference to auto-built editor's copy
-----

Reviews, comments, recommendations, questions, etc more than welcome, as
usual!

  --dkg

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