On Sun, Feb 22, 2015 at 07:34:53PM -0800, Jim Schaad wrote:
> 4. In section 3, I strongly urge that the problem of case folding of user
> names be acknowledged. I don't insist that the problem be solved. (I
> believe that it is not really solvable.) However I strongly field that the
> existence of the problem needs to be stated along with the fact that there
> is no intention to solve it. The problem statement can also easily state
> that this is a problem ONLY for US ASCII systems and not for UNICODE systems
> as these are less likely to allow for case folding in the first place.
> (Does not need to be in section 3, but that seems to be the logical place to
> put it.)
The problem *is* solvable. Case-insensitive receiving domains,
could publish a case-folded version of the user name (hashed with
a tag that prevents collisions in other domains, I proposed a
concrete scheme some months back). Senders could for the
unmodified lookup key, and then for the tagged case-folded
key.
The main question is whether we can reach consensus on wanting to
solve it (for OPENPGPKEY and SMIMEA alike). Solving is the easy
part.
--
Viktor.
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