@bryanredeagle @nullagent Signal relies on centralized servers and encryption keys were being stored in plain text. Unless I can host an app myself I can't fully trust what it will do or who they give access to. It needs to support end to end encryption with no logging. Bonus if it can be deployed adhock over out of band networks.
What I recommend, well I don't know. I'm looking into Meshtastic, but that requires dedicated hardware, Matrix is good, but extra effort has to be made to make it secure. Sadly, projects like @supapp appear to be abandoned.