Re: [ietf-822] A permission to re-sign header

["John Levine" <[e-mail]>]

>Even with the local part (marissam) an M-R is not really hard to
>forge, otherwise DKIM-Signature wouldn't have had to include all the
>other tags.  If we worry about replay attacks, we can enhance M-R so
>that it includes them too.  For example, we could make M-R exactly
>like a regular DKIM-Signature, except that it would be a very very
>weak one, something that the MLM won't break.

BTDT.  If we could invent a weak signature that the MLM won't break,
we wouldn't have this problem.  The M-R token is signed so it should
be impossible to forge, and we don't expect anyone to change it in
transit.

I also note that this hack, with or without Ale's changes, does
nothing to solve the send from gmail and WSJ article problems.

R's,
John