I believe we should insist on an encrypted voter ID card, something issued by each state for the sole purpose of voting.
Any other usage by law enforcement or whatever would be outlawed with severe penalties.
In order to vote, one would have to swipe the card at the voting precinct.
Unfortunately, this is the only way I can envision to stop the Democrats from having ghetto-party voting, or dead people votes, or any number of fraudulent means they are currently using to game the system.
Just as an aside, this is an issue that has come up in the recent Venezuelan election debacle and is affecting their upcoming elections.
They have national ID cards, which are used for voting, but there are 1.8 million ID cards that can't clearly be tied to any actual person, but which are on the voters registry. No one knows who these people are, but they vote. (1.8 mm in a small country is a large number).
In addition the government there has been issuing ID cards to non-citizens during the runup to the elections.
That, combined with the electronic voting machines that gave results that didn't square with any exit polling, and you have an unstoppable vote fraud. Of course, once vote fraud is unstoppable, there is nothing left but revolution.
That doesn't really argue against your case, it just shows that any system can be rigged if there is a will to rig it. There is no substitute for integrity. Once thats gone there isn't anything else except force.