I'm not sure it's relevant. Paper ballots can't be hacked on a national scale. I trust my local election commission. And even modest fraud can be managed; if someone wins with 45% of the vote, we've changed an outcome, but the democratic check-and-balance remains.

The problem is closed, proprietary, secretive, touchscreen voting machines. For all we know, Biden won Texas. Or perhaps everyone wrote in Putin as a joke write-in. We just don't know.

For how this works in practice, Applied Cryptography has a nice, readable explanation.