Erase all voter registration databases.
Require everyone to re-register with a state-registered ID.
Have registration cross-checked against all other databases.
Require state-registered ID at polling places when voting.
Make the laws include severe penalties for those that are convicted of voter fraud.
I’ll go one further...
Purge the voters rolls every ten years and make everyone re-register. Make election day the only day your can vote, no more early voting, same day registration, mail in ballots, and only the elderly and service personal get absentee ballots.
Penalty for voters fraud, five years for each vote, ten years for tampering or engineering voters fraud. No parole.