The new machines, like the ones they’re replacing, allow voters to use a touchscreen to select their choices. But they also print out a slip of paper with the vote both displayed in plain text and embedded in a barcode — a hard copy that, in theory, would make it harder for hackers to silently manipulate the results.
Security experts warn, however, that hackers could still manipulate the barcodes without voters noticing.

Voting machine, Seattle, 1971
(Image by (From Wikimedia) Seattle Municipal Archives from Seattle, WA, Author: Seattle Municipal Archives from Seattle, WA) Details Source DMCA