Here we've been discussing mostly about radios, systems and other electronic forms of Communications. But ComSec is a very broad term that is not limited to just over the airways.
What types of things do we guard? How do we transfer the information without litigating to the risk of sending such information.
Let's start with things we should be guarding. Personal contact information; names, mailing address, physical locations, email and telephone numbers should all be held as sensitive information and any release of information should be carefully considered.
Government issued licenced callsigns normally are available to be searched and display enough information to quite literally show up on the licencees door step.
Any and all SOI documents; authentication tables, frequencies/channels, MAPS, callsigns of any type etcetera.
The easiest way to, and the most secure way, to exchange sensitive information is via trusted carrier, a messenger for an in person exchange.
Second way is end to end encrypted email or messenger through an email independent from your personal email address.
I am using the app flowcrypt for my email and because I have some notion that maybe some of you may want to contact me, my public email is firstname.lastname@example.org if you want to discuss things behind the scenes.
For now that's all I have for now. Stay vigilant.