[judge2020]

This is what a lot of states get wrong, with the voting machine itself being the gateway to entering your vote and having it read. For the machines in my Georgia county, it prints a paper ballot that you drop it into a counting/scanner machine, but the issue is that the only thing on the paper is a QR code that is likely encrypted (nothing readable when scanned with a standard QR reader), so there really isn't a way to verify that the paper you got actually matched what you entered into the ballot machine.

The ideal system is: ballot machine entry -> prints paper ballot scantron style, so the only information the scanner will see is what you've verified is correct -> scanner reads it and enters it into their database while also saving the paper.

[eqtn]

This is how it works in India: Once we click the button for a candidate, There will be light highlighting the selection on the voting machine. A printer that is connected to the voting machine prints the voted candidate symbol (and name?) and shows us the printed paper through a glass for a few seconds for verification and then drops it in.

Later during the counting procedure, random ballots are counted for both. If someone arises some issues about the voting, those are then counted using printed ballot papers.

[arlort]

India is the only country doing electronic voting well that I'm aware of

Almost certainly the only one doing it well and at scale