Any machine that isn't vulnerable to manipulation. In NY State for years, we used the machines that you had to pull the curtain closed once you were inside the booth, pull down the levers for the candidates you wanted to vote for, and then your votes were registered when you opened the curtain back up. There were no paper ballots. Those machines worked fine. The main problem is the uncontrolled submission of absentee ballots around the country. Voting should be held to one day only, like it always was. The polls were open early enough in the morning, and late enough at night for anyone who wanted to vote, to be able to cast their vote on that one day. The longer period of time you give people to vote, and the more options provided to vote, that's where voter fraud flourishes.
Those old machines used IBM punch cards.
Updated version of those old machines, suggested:
Automatic mark applied - bar code of the vote.
So, punched holes and barcode must match.
Lever voting machines were not without problems. For one, these machines had thousands of moving parts. They required careful maintenance and were difficult to test. When the last machines were produced in 1982, fixing and replacing worn parts became nearly impossible. Lever voting machines were also not tamperproof: they were vulnerable to the very technicians who were supposed to maintain them. The machines were also inaccessible to voters with physical limitations: the labels with candidates’ names were hard to see, and pulling the levers required strength and mobility. Finally, lever voting machines did not provide an independent record of each vote. After the 2000 presidential election and the Helping America Vote Act (HAVA) of 2002, voting systems were required to have a paper record of each vote in case an election was audited or recounted. Because lever voting machines cannot produce a paper record, they are no longer in use today.