Discover how to establish secure off-grid communications in this 16-minute conference talk from FSCK 2025. Explore Meshtastic technology as a solution for maintaining connectivity without traditional infrastructure, presented by aprl. The talk covers essential techniques and approaches for reliable communication in environments where standard networks are unavailable or compromised. Licensed under Creative Commons Attribution 4.0, this presentation provides practical insights into mesh networking for those interested in emergency preparedness, privacy, or alternative communication systems.