I see the analog voting with paper ballots as difficult to hack at that level to any great extent. Physical ballots can be tallied several times by different operators in different rooms and each count check against the others. All of the counts should be exactly the same and errors can be caught right away.
With electronic voting a hack can affect thousands of votes on a local level and millions on a state level and be uncorrectable. There is no way to hand count electronic votes if the voting terminal has been tampered with by using a paper tally. The paper tally would also be incorrect if the rouge software was good. Test runs can be detected if the terminal has a clock. Any date/time outside of when polls are open can be counted accurately.