[Vvector]

Paper ballots are a must. Vote on a touchscreen, then have the terminal print out a voter-verifiable paper ballot that can also be machine counted.

Make the ballot printout layout a standard format. Then machines from multiple vendors can verify the counts on a subset of the ballots. And as a last resort, the ballots can be hand counted as well.

[stubish]

This is an eVoting system - not at a ballot box. There is no printer. And even if there was, a similar problem can occur if you lose the keys. And you need keys because the printout cannot be voter verifiable, or you enable the various forms of vote fraud that anonymous ballot boxes were introduced to stop.