Re: [idn] New draft: draft-ietf-idn-idna

[William <wil@dready.org>]

On Fri, 15 Sep 2000, James Seng wrote:

> > there's  another possible security consideration - if RACEs can be used
> > to encode pure-ascii labels then it becomes possible to have an
> > alternate set of DNS records for a particular domain - one of which
> > is keyed by the RACEd name and another of which is keyed by
> > the ASCII name.
> 
> That is not possible according to the algorithm for RACE.
> 
> However, an interesting variant of the problem which *might* occur with this
> maybe the interaction between nameprep and RACE.
> 
> For example, supposing we folding (*) dotless i to Latin i.
> 
> Now, given a domain name "*dn.tld" (or idn with a dotless i), should it retain
> as "idn.tld" or "race.tld"? 
> 
> I see this as an issue for nameprep, not in idna tho. 
> 

According to the RACE I-D, nameprep must be done before the conversion,
so it would be idn.tld.
So we have a supposedly idn label which, after folding, might clash with a 
pure ascii label.


wil.