Re: [openpgp] Put Signature in an Email's Header

[Benjamin Kaduk <[e-mail]>]

On Fri, Dec 11, 2020 at 11:14:33AM +0100, Neal H. Walfield wrote:
> On Fri, 11 Dec 2020 10:03:44 +0100,
> Wiktor Kwapisiewicz wrote:
> > On 11.12.2020 09:58, Hanno Böck wrote:
> > > FWIW I have heard lots of complains about the signature attachment,
> > > which is why I stopped sending signed emails by default a long time ago.
> > 
> > Too bad signatures cannot be put into headers (just like DKIM
> > signatures). That would not confuse people (because they generally
> > don't inspect headers) while providing necessary info for clients that
> > understand them.
> 
> When you say cannot, I think you mean there is no standard to so.
> Technically, I think, it is possible, and it is a neat idea.

You may want to keep an eye on draft-ietf-httpbis-message-signatures that
is defining an HTTP header field for conveying a signature over (a subset
of) the message.  It seems like at least some of the topics covered would
be relevant for the email case as well.

-Ben