It may not be a popular opinion around here, but the best election guard is doing them with pen & paper.
Care to explain why you think pen and paper is the best solution?
Well that said, I don't think its the "best" solution per se. It is wasteful -- a lot of paper must be produced for this single task. It is not completely free of loopholes, but they are burdensome and can be verified by a second count. And I can understand why countries like e.g. India or Indonesia use computers in this situation, millions upon millions of people cast their vote over a limited time period -- it's a logistical nightmare.
But it is far better than trusting a computer, that by definition "can do everything computable". And falsifying an election is definitly computable.