ietf-dkim
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Re: [ietf-dkim] New Issue: Third parties in "overview"

2008-03-13 09:31:46


-----Original Message-----
From: ietf-dkim-bounces(_at_)mipassoc(_dot_)org [mailto:ietf-dkim-
bounces(_at_)mipassoc(_dot_)org] On Behalf Of Frank Ellermann

| Any party, anywhere along the transit path can implement DKIM
| signing.  Its use is not confined to the end systems or only
| in a boundary MTA.

Found in 3.1.2, but chapter starts with "end-to-end", and this
is a critical point of the design.  Please explain it, proposal:

[... as is ...]
| Signatures by intermediaries are also known as third party
| signatures.

I'd like to be a bit more precise. I believe when people refer to 3rd
party signature, they mean a signature from an entity not represented in
the From header (as in ASP), or possibly also the Reply-to header. 

In other words, it is not affected by where the signing is done, but
rather by what entity is represented by the signature, i.e. the
originator could sign with a 3rd party signature, and an intermediary
could sign with a (delegated) 1st party signature. 

Ellen


If you add "email-arch" as reference maybe use the proper term
"mediators" instead of "intermediaries", or add "(mediators)".

 Frank

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