- Note: “relay” is the nostr term while “instance” is the AP/Mastodon/Lemmy term. They are functionally very similar and offer the same abilities to ban annoying users from “public square” type spaces. Moderation works identically.
- In AP/mastodon/lemmy you are connected to one “main instance” and then connect to other instances “through” that instance. In nostr, you are typically connected to multiple relays and access content more directly.
- Nostr is an underlying protocol like AP is for Mastodon/Lemmy. The main use of nostr currently is as a twitter/mastodon clone, but it has other interfaces as well (calendaring, video sharing, etc) that I am less familiar with.
- Both networks are decentralized in nature
AP/Mastodon/Lemmy
- Instance admins on your instance and the instance of the user you are DMing can read your DMs, block them, or modify them without your knowledge or the knowledge of the receiving user
- If your instance goes down, so does your access to the wider network. It will take your DMs with it, and your identity.
Nostr
- Relays cannot read the content of your DMs as they are encrypted. They can only see that user A is DMing user B and approximate DM size. (This upgrade reduces that visibility further)
- Relays cannot manipulate DMs as they are encrypted and will fail a signature check
- No relay can prevent you from DMing another user as your client will automatically route the DM through another relay (unless that user has blocked you, which they can do).
- You can receive DMs from anybody as long as one relay lets your DM through (and you are usually connected to several)
- Your DMs and other content is replicated across multiple relays. Downed relay? No problem. You don’t lose your content or your identity as your identity is a private/public keypair not “user @ instance dot com”
Bluesky
Idk anybody care to fill this section in?
Image source: nostr post
To store message content. To hold message content if you send a message to an offline contact and vice versa. To handle getting things across networks (clearnet to Tor and back if you only are connected to one). To work around NAT etc. To moderate “public square” type features (ie trending posts). Many reasons.
No problem, relays can communicate cross-network. They relay things between each other so traffic will find a way through as long as one node speaks to both networks.
As long as there is a relay path between you and your contact, there is no issue. Relays can be run through Tor and other anonymity networks which are very difficult to distinguish from other forms of encrypted traffic.