> You will typically get voter registration ID, just like in paper votes so you should be able to trace. The only thing different in electronic voting is that you sign vote with your private key which becomes your signature. So in theory, whatever can you do by receiving signed paper from someone, you can also do by encrypted content from someone.

Either you're responding to the wrong comment or I'm failing to see how this is at all relevant to what I asked. How does tracing your own vote tell you if John Doe was fake?