[Reventlov]

There is no licensing issue, you can use LoRa without a licence (like Wi-Fi) in a few bands depending on the country / zone you're in (915MHz, 868MHz, 433MHz…). You have to respect duty cycles restrictions (not emit more than 1% of the time, for example) though if you're not listening to avoid collisions.

[mixxit]

isn't also that all communication is required to be unencrypted?

[numpad0]

Depends on local laws. For where I am, LoRa radios fall into similar requirements to Wi-Fi, where devices must be certified but encryption require no license.

[detaro]

Outside ham bands such rules are rare.