Not stored in DAG, encrypted and traverses Byteball network, looking for its destination, stored at hubs for a configurable amount of time. You can chat with anyone, if you haved paired previously with the other device/person before - otherwise spam would be a problem.
While you are here: Could you explain how to use Byteball for IoT? My i7 notebook can't sync as a full node, what about tiny IoT devices then?
EDIT: It's not really that old, here is its configuration -

Weak fud, you can do better than that.

Due to legal team we cant release our PoC Byteball
light-client on IoT.
Anyone with good programming skills can direct message me for hints.