It turns out transmitting encrypted traffic out on a ham radio is highly illegal.
I think I have a workaround.
Modulation is publicly available so....
I can howeverr use a script that encodes / compresses the file in about 70 ways, then send the file.
The other side would have a script that reverses the process.
I think someone could drain a bitcoin wallet before someone else could manually decompress/ decode that file....
Sweet sweet workarounds.
AES-256 is out.
So long as the encoding/compression is publicly available. Were golden.