I don't believe they can be made secure. I have had voter registration cards. I've been voting for a long time. I just turned 65 this year and I've never missed a single provincial or federal election. Every time I've had one of the cards, I've thought, my God, this is a really crappy, insecure system. It's just a piece of paper. I could make one of those. I could concoct one and make a pretty good facsimile.
On June 5th, 2018. See this statement in context.