We all know Signal, Matrix, Telegram, SimpleX, etc… But if you can’t access the internet you can’t communicate. Pretty logic. But would it be possible, at least theoretically, to create an app that permits to message people even if the internet goes down?
It might be a dumb question I really have no idea to be honest.
It’s not p2p but at least many years ago:
SMS.
If the Internet outage is local then the towers would still work and you’d be able to get texts. I went through a few storms where wired home internet was down, the towers weren’t giving me a data connection (no mobile web browsing or anything), but I was able to send and receive texts.
If you really care about what you’re asking after, do what someone else said and get a radio license. It’s 150 year old technology and every time something happens radio operators pop up some kind of emergency communications or bridge to the internet through repeaters or something.
Briar or meshtastic
Telegram isn’t P2P and isn’t recommended. Signal is good, but not P2P. Matrix is decentralized, not P2P. SimpleX is P2P, I think, but not sure.
Simplex uses Severs, you can bring your own one, but it is not peer to peer when talking about direct communication to the recipient
SimpleX uses onion links
positive-intentions is a decentralised P2P chat app. https://positive-intentions.com/
Yea but there are android versions too. Its to send files over WiFi direct phone to phone with no network but some also have chat.
Oh interesting! I’ll take a look into it thanks.
yggmail is a fairly obscure and experimental take on email on a mesh network: https://github.com/neilalexander/yggmail
Would this work through something like meshtastic?
yggmail specifically, probably not. yggdrasil uses TCP/IP and the Meshtastic latencies to perform connections would be too high AFAIK. It would probably only work in a fairly well-connected network. yggdrasil could be used directly over a WiFi protocol but it would need fairly good reception to function.
N.B. I haven’texperimented with this myself.
This was a common thing that was developed for the international protests after Arab Spring, which would frequently have their Internet shut down as a State tactic to prevent communication amongst protestors.
Mesh net chat apps like FireChat were born in response
@Ju135 Briar over WiFi or Bluetooth.
Surprised nobody mentioned scuttlebutt yet https://scuttlebutt.nz/
SSB can use the internet to share encrypted messages via hubs/servers, but it also can share the same messages peer to peer in a mesh sort of setup without the internet using a ‘gossip’ protocol within a local network. It was invented by a sailor who was regularly away from WiFi due to being at sea.
Depending on how far you’re willing to push the definition of “messaging” you could look into getting your ham radio license.
I think SimpleX is mesh?
Yes, it’s possible. To be honest, I find it very sad that we have grown so dependent on ISP and big telecom companies to have a working network.
In theory, you could have an infrastructure in your neighborhood and be able to play Quake with your neighbors without making use of the phone line at all, completely free of monthly fees and with a very efficient and fast connection too! you’d just need cabling connecting the apartments/houses and some decent routers controlling/restricting access on each subnet. It’s a pity that’s not a standard thing when designing residences.
Though less efficient and more limited in range, you can technically do it with Wifi and mesh networking too… there are projects like B.A.T.M.A.N (https://www.open-mesh.org/), however, it’s not very user-friendly to set up. I believe there have been some projects that attempted to launch embedded devices to act as mini routers for this, but the spread has not been wide enough to make it worth it, sadly.
Briar has a mesh mode. And i think there was a matrix app doing this too?
If you don’t want to use internet the only ways are to use radio or deploy your own network infrastructure (optic fiber or cell tower), so there’s no really any messaging app that can be used without internet. Briar can use Bluetooth but with a limited range, needing an actual dense mesh network.
