I can answer some of these, but not all.
--On May 15, 2007 12:08:09 PM -0700 Steve Atkins <steve(_at_)blighty(_dot_)com>
wrote:
1. Does anyone have an overview of the benefits and
drawbacks to DK and DKIM in general?
I think there's been several short descriptions, although I don't
think I've seen a definitive analysis. I believe the intro to the DK
document includes a summary, but I haven't actually read it in a year
or so.
2. How about the differences between DK and DKIM?
I've got that on my to-do list, but I'm not going to be able to get
to it before next week.
3. Is a valid DK signature a valid DKIM signature?
No.
3b. If the general answer to that is "no", are some subsets
of DK signatures also valid DKIM signatures?
No. Among other things, they use different signature headers.
4. What are the Intellectual Property implications of
deploying DKIM? (The Yahoo DK license agreement
has scared off a number of people from implementing
or using it).
So far as I know, everything should be completely open for use. I
think that the Yahoo! claims may apply to DKIM as well, but so far as
I know they have completely addressed those issues. Their most
recent IPR disclosure is at
<https://datatracker.ietf.org/public/ipr_detail_show.cgi?ipr_id=716>.
The interesting bit reads:
Yahoo! licenses its Necessary Patent Claims contained in the
patent(s) and patent application(s) disclosed above under
either of two separate license agreements, one of which is
the DomainKeys Patent License Agreement (v1.2), and the other
is the GNU General Public License v2.0 (and no other version).
I'm not sure what it means to apply the GPL to a patent license, but
there it is.
eric
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