> Looks like communication apps will need some pub key to distribute to contacts in the future that solution is unworkable because non-technical people don't k

> Looks like communication apps will need some pub key to distribute to contacts in the future that solution is unworkable because non-technical people don't know (and don't want to know) what a pubkey is, and they still want to be able to dictate their number to somebody. Unfortunately, the only solution that makes sense here is to restrict message sending to authorized devices and authorized apps.