Considering people have hacked other space probes, I would guarantee there is no encryption on the communications. See, e.g.: https://en.wikipedia.org/wiki/Int

Considering people have hacked other space probes, I would guarantee there is no encryption on the communications. See, e.g.: https://en.wikipedia.org/wiki/International_Cometary_Explorer https://en.wikipedia.org/wiki/International_Cometary_Explore... Apparently this says no encryption, though I've not read the whole thing: https://descanso.jpl.nasa.gov/DPSummary/Descanso4--Voyager_new.pdf https://descanso.jpl.nasa.gov/DPSummary/Descanso4--Voyager_n...