Home/Use cases
Where it earns its keep
Built for the day the network isn’t there
Almost all human coordination is asynchronous. These are the places where leave a message for whoever comes by is not a convenience but the only thing that works.
The case it was built for
Disaster response
Drop solar stations across a zone. Responders passing through pick up everything left for the group and drop off everything they’re carrying. No cell network, no repeater chain, no operator sitting at a radio, nobody needing to be anywhere at the same time as anybody else.
Works with the cell network down, the power out and nobody staffing a radio. A station on solar keeps holding messages through a week of cloud, and refuses to expire anything while its clock is untrusted rather than quietly discarding what it can’t correctly age.
A broadcast channel makes it a team tool: scan one QR at the staging area and everybody in the group reads everything sent to it. One payload reaches many recipients at one carry slot, so groups make the copy budget better, not worse — and a solar station is the ideal node for holding channel traffic.
Be clear about what a channel is: every member can decrypt everything ever sent to it, including traffic from before they joined. There is no forward secrecy and MeshDTN doesn’t claim any. The details.
The deployment pattern
- Stations at the staging area, at the perimeter, and at each pocket teams work in
- One broadcast channel per team, distributed by QR at the briefing
- Phones carry between the pockets — no radio needed for anyone on foot indoors
- Corridor stations along the route in and out, so the zone is never isolated for long
- Every station holds ciphertext it cannot read and keeps no record of who it met
And everywhere else
The network is the people
Search and rescue
Teams working a grid are rarely in contact with each other and always moving. Messages route themselves through whoever crosses paths.
Rural and remote communities
Villages a valley apart, connected by whoever drives between them.
Marine and backcountry
Message from anchorage or trail without a satellite subscription — and get told when it landed.
Rooms and buildings
Phones in Bluetooth or WiFi range carry for each other with no radio at all — a room full of phones is a mixing point, and nobody there needs a radio.
Travel and border regions
Works where roaming doesn’t, and where you’d rather not be on a local network.
Resilience and preparedness
Infrastructure that keeps working when infrastructure stops working, with no subscription to lapse and no company to fail.
Corridors
Isolated pockets become a continuous message path
Stations placed along a route turn a set of isolated pockets into a continuous message path — a highway between towns, a valley road, a trail system, a stretch of coast. Nobody has to be at any of them. Each station holds what it is handed and passes it to the next person through, so a message crosses the whole route in pieces, with different people, at different times.
How a corridor is builtRange is the wrong question. A message can cross a hundred miles through five people who never met each other.