What is the current state of satellite signal hacking
It’s not exactly an answer to your question, but the research related to this link talks about hacking the analog TV signal sent by the drones, and how trivial it is. Now most milotary drones send digital signals, but hobbyist ones still use analog.
You can also look into the SDR community. There are niches interested in satellite signals.
I found this answer enlightening: http://security.stackexchange.com/questions/41797/is-it-possible-to-decrypt-a-satellite-tv-signal-without-using-a-smart-card
Wow - I HAVE this issue of Wired in a box somewhere, I remember reading this article as a kid. It has the creators of the game “Myst” on the cover if I’m not mistaken.
Can’t say for sure why this article always stuck with me but it sure has …
“The DES algorithm is mathematically impregnable and has never been broken, even now…”
It’s dated, but an interesting read.