This suggests a question: how does the Voyager handle authenticating commands? Whatever crypto they had in 1977 is surely completely broken now. Security by obscurity? Or can anyone with a large enough antenna send commands to it?
The Voyagers’ protocol use no encryption and the specification appears to be public. I’ve linked a PDF of what appears to contain the protocol description below. So anyone with a *large enough* antenna can talk to it. It just happens to be that the “anyone” on earth really is just NASA and its Deep Space Network.
