Why don't they just remove the wifi and cell modems from the voting machines? And stop connecting the tabulators to the Internet? And stop using an opaque non-human-readable barcode as the official "paper ballot"?
But ES&S has an entire C-suite full of rabid Trump donors, so instead they talk about "bug bounties" to stall discussing real issues until after the election.
Or states could just choose to use hand-marked paper ballots. But that's not the way America rolls. Sad.