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Re: [openpgp] signed/encrypted emails vs unsigned/unencrypted headers

Werner Koch <wk@gnupg.org> Wed, 17 July 2013 09:34 UTC

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From: Werner Koch <wk@gnupg.org>
To: Ximin Luo <infinity0@gmx.com>
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Date: Wed, 17 Jul 2013 11:29:47 +0200
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Subject: Re: [openpgp] signed/encrypted emails vs unsigned/unencrypted headers
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On Wed, 17 Jul 2013 10:01, infinity0@gmx.com said:

> I don't see how this is significant - is it such a conceptual stretch to
> imagine headers and the body being encrypted separately? Or do you mean that
> RFC 822 does not support this?

MIME supports this.  But it does not care about the outer header.
Partly because it carries the meta data required for parsing MIME.

If you like to encrypt the subject, you may simply use a single line
base64 encoding of the an OpenPGP encrypted message.  But there are
problems.  Imagine that you need to encrypt to several recipients with
the resulting line extending to over 989 characters - which violates
rfc822.

> Which mailing list, then? pgp-mime has been shut down and redirected to this

Feel free to use the gnupg-users list.  Over the years this kind of
ideas have been discussed there several time.  Or any other MUA related
list.


Shalom-Salam,

   Werner

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Die Gedanken sind frei.  Ausnahmen regelt ein Bundesgesetz.

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