this post was submitted on 25 May 2026
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Privacy

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Peer to Peer Messaging App (lemmy.nz)
submitted 2 months ago by GradleSurvivor@lemmy.ml to c/privacy@lemmy.world
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I have been working on an Android App quite a while now, starting from a simple idea.

A messenger where messages travel directly between phones with no servers in between. Using direct WebRTC encrypted connections (SRTP/DTLS), there are no servers that stores, reads, or relays content. Group chats use a gossip protocol where members relay to other members.

The only infrastructure the app touches is a signalling relay to set up the connection (no message content), a push notification to wake up a sleeping phone (also no content), and a TURN relay for restricted networks (encrypted packets only).

I wrote a detailed white paper explaining the full architecture: https://www.mindtheclub.com/white-paper.html

The app is in Open Testing on Google Play (1,000 tester cap): https://www.mindtheclub.com/beta-signup.html

I’m interested in this community's perspective on whether the architecture holds up.

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[–] hirihit640@sh.itjust.works 1 points 2 months ago (1 children)

so it sounds like this is more for group chats, to ensure at least one member is online at all times. Otherwise, if it were just 1-1 messaging, and one person's phone went offline, the other person would have to wait until it was back online to send a message, right?

[–] GradleSurvivor@lemmy.ml 0 points 2 months ago

That is correct, but it works well for 1 to 1 messages.

There's no relay in between, but you don't have to wait to send, you hit send normally and the message just queues locally on your device, then goes out automatically the moment a direct connection re-establishes. Nothing sits on a server in the meantime.