Extra
Even if it were possible to design a provably correct, impossible to tamper with, anonymous electronic voting system (which seems unlikely to me) it still should NOT be used. Why?
Everyone understands paper in ballot boxes, and how they can be cheated, what to look for. Everyone can assess an argument as to whether this happened based on the evidence presented.
Basically nobody would understand what to even look for in cheating the electronic system. It would be totally my expert says your expert is wrong and so it is/isn't fraud. Having even the possibility of that argument for electoral fraud is completely insane.
It doesn't just have to be fair, it has to be seen to be fair. Really it does. We need to have reason to have faith in our democratic processes most especially when the people you want to win, don't and the result surprises you.
The sooner we get to "Any electronic voting must be used to mark a standard paper ballot which becomes the entire source of truth." The better. Everything else in electronic voting is dangerous, sinister and flat out evil. Oppose it. Loudly. At every opportunity. Especially if you're known as someone who understands computers on some level.