The concrete evidence comes from the past, not from the future. From a purely engineering perspective, the fact is that it works and works well. The simple so

The concrete evidence comes from the past, not from the future. From a purely engineering perspective, the fact is that it works and works well. The simple solution of stating your name + address (or receiving a ballot addressed to you by mail) then having your name checked off the list when you return the ballot is friction-less, robust, and extremely difficult to attack at scale. Over-engineering the system's security would most likely do more harm than good.