Step one: send a file that's cryptographically signed.
Step two: the client solves the problem of "which of these duplicate and conflicting packets do I need to assemble together to make a message that is appropriately signed?"
Didn't use to be. VIA/centaur was the first to add AES instructions, later picked up by Intel and AMD. Its not free, but not expensive.
A brilliant woman from, where, Slovenia? figured a way to use SSE instructions to encrypt just as fast as the built-in instructions, I think 2 cycles per byte.
I guess DJB's ciphers run much the same way, nowadays.
not true, although i'm sure there are one-off instances where there's no encryption. but in general there's lots of encryption on each of the different levels of secure government networks.
Right, they didn't want us encrypting what they were going to encrypt in their routers anyway. "Trusted" is a technical term.
So they started using Aspera to send video from the UAVs over Iraq etc. to the Pentagon. Before that, they were literally flying boxes of videotapes (or CDs? Tapes seem hard to believe, except this was govt.) to a warehouse, where analysts could check them out, like from your neighborhood library.
Probably now it's all realtime. But they have to stream it, somehow, so it is likely still going via Aspera to Nevada or wherever they work the remote pilots.
At the time (mid-late 2000s) the video output from the UAVs was sent in the clear, in analog format, and recorded in analog format. So they had to start digitizing it in the field to transfer as files.
Jihadists could tune in an ordinary scanner, and watch the video coming from them. Embarrassing.
