Register in advance of election
voter rolls cleared every 10 years
must show up to vote in person
Government ID required
paper ballots for full traceability
Strict absentee ballots for deployed military only.
Anything else is an invitation to fraud.
None of these are Federal issues.
The appointment of Electors is a sole, sovereign function of State Legislatures, they can make whatever rules they want for voting, or they can do away with voting entirely.