A paper ballot is the ONLY way to go.
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From years ago: "This may be the biggest vote fraud scandal ever to rock the nation!" -- Mike Wallace of "60 Minutes" upon reviewing the Votescam evidence. However, after meeting with his higher-up's, Mr. Wallace dropped the issue like a vial of Anthrax.
I can live with that, so long as they are uniform and there is no way to "lose" them or to "find" more after the voting.
Since that is near impossible, there has to be a set of checks and balances. For instance, it doesn't take a brain surgeon to figure out that results in districts with 105% turnout are obviously fraudulent and MUST be disregarded! Full ID required of every voter. Purple finger after voting. Double voting by "snowbirds" (absentee in NY/NJ, at the polls in FL) needs to carry jail time.