I have been a bit worried about this as we go to software driven voting machines.
I'm not worried about software-driven voting machines, I'm worried about machine-tampering, particularly with touch-screen machines with *NO* paper audit. As for going with a paper ballot, I'm not sure that is all that secure, either, given the accusation of ballot-box stuffing and voting thrown-out ballots in mail-in systems.
What I would like to explore is the use of a paper system in which you use your computer (or company computer, or school computer, or library computer) to prepare a printed ballot, and then take that ballot to the polling collecting place. The design of the ballot is that it's human-readable using OCR typeface, so that the voter can proof his/her ballot before taking it to the voting place and depositing it in an electronic ballot box. Couple that with voter ID paid for by a tax on campaign contributions, and you have something.
Voter id is free everywhere. You just have to get there which is the claimed problem.
The printed ballots should work out fine.
Control and delivery should be tightly controlled. No ballot boxes pulled of car trunks. No exceptions.
I would also change the law so that voter fraud would be 10 years, no parole.