[Standards] Phone number-based contact lookup

Chris Ballinger chrisballinger at gmail.com
Wed Jul 26 17:30:06 UTC 2017


Phone number IDs are fundamentally incompatible with federation. If you
want phone # ids, you'll need to run your own centralized silo because
there's no way to verify # ownership across servers.

On Fri, Jul 7, 2017 at 4:20 AM, Ivan Vučica <ivan at vucica.net> wrote:

> Hi,
>
> Has there been any discussions on how would, hypothetically, XSF
> standardize lookup of contacts based on phone numbers?
>
> Context would be a hypothetical "modern-style" mobile IM client that bases
> everything around phone numbers.
>
> I have some vague thoughts about it, and no real ideas how to solve
> messaging and presence federation without centralizing contact lookup, but
> I am curious to hear whether I missed any standardization work.
>
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