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As it is illegal to do encryption on Ham radio frequencies in some jurisdictions, namely the US and for less nefarious reasons than you would think, I don’t think this exists for the general public.
You could build something with a p2p messenger on a WiFi mesh network, and there is Meshtastic for text communication over LoRaWan.
You’re right. Even packet radio can’t contain encrypted packets.
The reason:. The citizens own the bands. Can’t block other citizens from the information.
@Unfunnyryan @poVoq The whole not being allowed to encrypt is why I never got into amateur radio.
