Hi, I’m curious if there’s a decentralized protocol that prioritizes privacy by default, allowing only approved individuals to see what you post online. I’m exploring decentralized protocols like ActivityPub and NOSTR and wondering why they don’t encrypt both event content and metadata (such as event type, time, etc.) using the poster's private key. Ideally, I’m looking for a solution where the existence of an event is publicly verifiable, but all details remain private, accessible only to those I trust.