Related to Zero Knowledge Proofs, the advantage is that phone numbers need never be shared in cleartext, preempting whole classes of attacks. However, could be overkill for your needs, and I am not sure how well current techniques would scale.
It would be great if users don't have to share the actual number with the server, a hash or something like that but that would make it impossible to verify the number and verification is required to prevent spoofing.
Another way maybe is to have a trusted 3rd party (something like EFF, LetsEncrypt) that can be used by users to validate their numbers and applications can get the hashes from there.
We really need to rethink this “one corp owns all the keys and all servers” setup.
> highlights the risks associated with the centralization of instant messaging services
Any cervices, really
> Even better if it’s something I can self host or join into one from many servers (remember IRC? Good times).
I thought Threads only interoperates with Mastodon/the fediverse in some limited capacity. Did I miss some Bluesky integration announcement?
> That's opt-in