Green Sheep on Nostr: No, but it's a very similar design with relays. Nostr has largely failed to provide a ...

No, but it's a very similar design with relays. Nostr has largely failed to provide a private and secure DM protocol so far so that should be a good thing.

quoting nevent1q…au8x

We love Nostr as a publishing platform that offers unparalleled censorship resistance. But NIP44 does NOT provide most of the important qualities of e2e encryption:

- break-in recovery.
- repudiation (deniability).
- visibility of connection graph to observers.
- fixed message sizes (although it can be provided by the specific app)
- resistance to Shore algorithm (PQ encryption).

It's unclear whether it provides forward secrecy, but the spec implies that it does not - I might be wrong here.

We wrote this post about the qualities of e2e encryption and why they are important: https://simplex.chat/blog/20240314-simplex-chat-v5-6-quantum-resistance-signal-double-ratchet-algorithm.html