This video (https://www.youtube.com/watch?v=oIyckKhZrpA https://www.youtube.com/watch?v=oIyckKhZrpA) has a few good points on having private conversations via t

This video (https://www.youtube.com/watch?v=oIyckKhZrpA https://www.youtube.com/watch?v=oIyckKhZrpA) has a few good points on having private conversations via that don't "obscure the message" via ham radio, namely: - Use rare/odd frequencies that are hard to access with commercial off the shelf gear - use esoteric modes and modulations (like you mention)