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this post was submitted on 24 Sep 2024
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@trwnh@mastodon.social fun fact, webfinger actually supports URLs and [in theory] phone numbers!
The key (and this is a social science and cultural insight, not technical) is that when you ask someone's "name" or "address" they need something that's unambiguous, personal, and opaque in the sense that it works everywhere (online / distributed, it needs to be globally unique, too) or they won't use it.
Bare domains aren't ideal because (1) they're expensive and (2) management is hard.
@trwnh the "trick" with webfinger is that it's a way to go from a "name" to an authoritative context (the authority for "x@y.xyz"' is "y.xyz" and the authority for "blah.com" is "blah.com"; the challenge with phone numbers is that it's impossible to infer the authority for +1-416-867-5309 / telcos don't provide a lookup system). That's really it; the rest is a cultural thing.
@blaine there might not be an authority for a phone number but i think it can be handled more like a combo of "local dns resolver" + "registry of phone number". sure in many cases with identifiers that have an authority component you can just use their webfinger if they have one, but i think it would also be cool to be able to use your own webfinger and "proxy out" as needed, in the same way that dns does it
@trwnh@mastodon.social @blaine@mastodon.social wait aren't 0 and 1 authorities ? if it starts with 2-9, it's a number in the same area code as you're dialing out from, starts with 1 diff area code, starts with 0 diff country code...
@trwnh@mastodon.social @blaine@mastodon.social i guess authority isn't the word for that but there's relrefs and absolute refs at least. not sure i follow the proxy out metaphor tho
@by_caballero @trwnh this would work except for the specific way that number portability is implemented. ๐ At least historically, and very likely still today, the "database" used to map phone numbers as assigned by exchange blocks (i.e., to a given carrier) to phone numbers that have been ported to a different carrier by the customer (under number portability laws) was a set of spreadsheets synchronized by FTP at intervals. Access to said "databases" is entirely contractual.
@blaine@mastodon.social @trwnh@mastodon.social uuuuugggghhhhh i wish i could unlearn that hideous namespace governance
@by_caballero @trwnh so _in theory_ PSTN operators could provide a lookup system, but it'd be jank af at best, and more likely it would be a horrendous unfixable security disaster.
@blaine @by_caballero i was thinking more that you could declare a tel: as one of your "aliases" at your authoritative wf and then it percolates through the rest of the system
@trwnh@mastodon.social @by_caballero@mastodon.social since tel: is extremely fraught, especially nowadays with insane phone spam etc, a Signal/WhatsApp/etc address might be a good alternative example?
I particularly like the "established encrypted messenger" example because the wf->[rel=messenger]-> lookup could get Fedi encrypted DMs "for free."
(obviously lots I'm glossing over that make it more complicated, but in theory it'd be less complicated than many alternatives)
@trwnh@mastodon.social @by_caballero@mastodon.social (one thing to note is that it's not possible to declare an alias, e.g. a phone number in a wf or other profile, and then use that alias in reverse as a way to look up the original profile. I mean, one could do it, but with questions of identity at play it would be an incredibly very extremely bad idea to do that from every conceivable security perspective.)