looking up domain names with unassigned code points

[Tina Dam]

Vint, this is true. ICANN staff have recommended to the .SU operators not to open for IDNs in this matter and also offered to assist or recommend other experts to assist in deploying IDN.SU in a secure manner, just FYI.

Tina

> -----Original Message-----
> From: idna-update-bounces at alvestrand.no [mailto:idna-update-
> bounces at alvestrand.no] On Behalf Of Vint Cerf
> Sent: Sunday, May 11, 2008 9:21 AM
> To: Cary Karp
> Cc: idna-update at alvestrand.no
> Subject: Re: looking up domain names with unassigned code points
>
> If this is true, this is a very disappointing outcome -the .SU
> operators are certainly damaging our general efforts to make the
> Internet a less confusing place in which to operate.
>
> v
>
> On May 11, 2008, at 11:13 AM, Cary Karp wrote:
>
> > Quoting Vint:
> >
> >> technical question:
> >>
> >> if someone generates an arbitrary  string of the form "xn-- <random
> >> sequence of lowercase a-z, 0-9 and hyphen>
> >> does the algorithm ALWAYS produce a sequence of UNICODE code points?
> >> Note I did not say a PVALID set of code points or even ASSIGNED.
> >
> > I'm not sure if or how it weighs into the consideration of this
> > question
> > but on April 28th, the .SU TLD registry began accepting the
> > registration of subdomain labels beginning with xn-- without
> requiring
> > them to be valid output of the Punycode algorithm:
> >
> > "A user or service provider can either design software used for
> > decoding and decoding algorithm on his own or use PUNYCODE algorithm
> > recommended by ICANN and published in RFC documents."
> >
> >       http://www.fid.su/english/?newsid=1207819620
> >
> > One purpose of allowing non-IDNA-compliant alternatives appears to be
> > to permit script mixing:
> >
> > "In the process of generation of domain names with xn-- prefix using
> > encoding algorithms mentioned in RFC documents registrators are not
> > allowed to mix symbols of different national alphabets."
> >
> > /Cary
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