Paper ballots are hack-proof. It's time to bring them back.

" In some ways, paper and ink is a super technology. When you cast a vote on a voting machine, all that’s recorded is who you voted for. But a paper ballot captures lots of other information: Ink color, handwriting, etc. If you have access to a voting machine that’s connected to the Internet, you can change all the votes at once. To change a bunch of paper ballots takes physical access, and unless you’re very careful the changed ballots will show evidence of tampering.

Perhaps it’s time to mandate paper ballots, and to also legally require other steps to ensure election integrity. Vote-counting systems should be transparent, and regularly audited. Voter ID should be strictly enforced, as it is in all advanced democracies to ensure that only eligible voters vote. And voter registrations should be audited frequently to ensure the removal of voters who have died or moved away. Maybe we should even dye voters’ fingers to prevent revoting, as is done in many other countries. There’s no way to hack that."

[USA Today]