I've said this for 25 years:

Honest electronic voting machines are easy .. if they wanted honest elections.

Required steps:

1. Each vote produces an electronic record AND a physical print record.
2. Each physical print record must have: a. A unique serial #. b. A time and date stamp. c. The actual vote in a be human readable format.
3. The voter checks the printout and places it in the ballot box.
   
4. Electronic results are calculated immediately. But, the physical printout is the official record (source of truth).
5. Physical printouts are stored for 10 years and can be inspected if there are any questions by either party on the validity of the results.
   

One problem with physical paper ballots is the way they are marked. I remember when we had those, many years ago after I came back from Vietnam and it was my first time to be able to vote (21 years old back then). The ballot had a square next to a name and the voter was supposed to use a pencil-like device which had a rubber square end on it. The rubber thing was coated with indelible ink. So of course, the morons would try it out and say "ooops, wrong place", which invalidated their ballot. Other morons would never read the instructions or listen to the instructions from the official and use the black pad thing to smear and big "X" mark across the square next to the candidate's name. Another invalid ballot. I am not in favor of paper ballots unless the way they are made are by the means that OP mostlyfriendly said below. I like that kind of ballot plus it makes it easy to count the votes as soon as they are recorded; none of the wait two weeks, etc. Also, NO absentee ballots unless the voter can produce a doctor's certificate. NO mail-in ballots, period. Voter ID absolutely necessary including niggers who may or may not have a driving license -- maybe their library card? LOL. Oh yes, and ALL ballots in the American English Language ONLY.