Replying to Avatar Vitor Pamplona

Nothing blocks Nostr clients from sending Nostr events to one another directly, without a relay.

Both clients need to be online and show some IP that the other will connect into. Totally feasible.

We can even use a Push Notification server to send phone to phone messages with background apps. But that's kinda like having a relay in the middle.
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Flobstr 2y ago

What's the security risks here? And some more downsides besides both clients need to be online. Please elaborate

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Vitor Pamplona 2y ago

Hard to say. It will require us to actually develop it to flesh it out. You would have one less public surveillance point (the relay) but you would potentially introduce other security/privacy issues like Bluetooth/WIFI sniffing for instance.