Long range (LoRa) mesh networks are interesting alternatives to communication, especially when state actors are blocking internet access for various reasons.
More details about meshtastic: https://meshtastic.org/
About its current state of encryption: https://meshtastic.org/docs/overview/encryption
Not sure why you decided to ask that person the question like that, but when it comes to AI, LoRA stands for Low-Rank Adaptation. They are used to fine-tune models. Next time be a bit more polite.