Given how simple the computer is, I very much doubt it. If anything, it might have a very simple xor encryption or just a passphrase. If anyone were sufficently motivated, it probably would be trivial to snoop on the DSN transmissions and crack any authentication. I'm sure it'd be susceptible to a simple replay attack at any rate
The problem is simply that you need a huge transmitter with (AIUI) some special and unique modulation hardware. Also there's nothing to be gained from interfering with the Voyagers. Really the only practical thing you could do is shut them down a couple of years before they die anyway. There's just no point.
The problem is simply that you need a huge transmitter with (AIUI) some special and unique modulation hardware. Also there's nothing to be gained from interfering with the Voyagers. Really the only practical thing you could do is shut them down a couple of years before they die anyway. There's just no point.