Re: [dane] Start of WGLC for draft-ietf-dane-openpgpkey - *please* review.

["Jim Schaad" <[e-mail]>]

> -----Original Message-----
> From: dane [mailto:[e-mail]] On Behalf Of Viktor Dukhovni
> Sent: Sunday, February 22, 2015 7:53 PM
> To: [e-mail]
> Subject: Re: [dane] Start of WGLC for draft-ietf-dane-openpgpkey -
*please*
> review.
> 
> 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.

And what happens in the following case:

I am on a case sensitive receiving domain.
There are two recipients - JimSch and jimsch on the domain.
jimsch has a record but JimSch does not.
I now try and send mail to JimSch but get a key for jimsch.

Jim

> 
> 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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