Communications and privacy will always be a concern, any protocol a computer can generate can be broken, the question is how long, and how important.
If your ego about your importance in the world is justified by others, then expect them to be listening. You can only slow them down.
For the rest of us, who are meaningless, no one will take the time to break through tissue paper to listen in on us. And we are safe enough.
If you seek real security, don’t use a computer to encrypt your message, find a better way.