That poses an interesting technical question - how do you achieve military-grade encryption over a communications line with heavy packet loss (assuming the dron

That poses an interesting technical question - how do you achieve military-grade encryption over a communications line with heavy packet loss (assuming the drone->satellite connection is like that)? Most self-synchronizing ciphers would have too much of a lag for real time operation. Perhaps two synchronized pseudo-random number generators, driven by synchronized clocks, could be used for variable key generation for a symmetric cipher.