Elections are easier to solve technically. No mail in ballots. Require state ID in person at the voting center. But that's a different topic that can get divisive, long and derailed very quickly.
That is exactly how elections are run in the largest democracy in the world. If India can do that why can’t the US? It’s just that a certain side is dependent on illegal voters.
The problem is not fake votes, it’s boomers having their brains cooked by AI videos coming from Russia they can’t identify as fake.
Only if you're fine with disenfranchising voters. In which case, securing elections is the easiest thing in the world: I vote and nobody else does. It's securing elections while not disenfranchising voters that's the hard part.