And now you have moved the problem.
Now you need to verify that the verification machine is also running the software you want and has also not been compromised. And you need to do this for every single voting machine in use, all of them.
With trillions of dollars riding on the result of an election, the motive for a group/nation to interfere is immense. Attacks against digital systems scale incredibly well, changing a handful of votes is barely different from changing all of them. This is not the case with physical votes, the more votes you want to change the more people you have to involve, and the likelihood you are caught goes up.
On your point about printing off a human readable copy that can be verified manually, you have now invented the worlds most expensive pencil. You’ll always want to verify the manual copy, so why bother with the computer one?
A fun fact about why pencils are used in voting in the UK is due to paranoia about pens being replaced with ones containing vanishing ink. There is no evidence this exists or has ever been done, but it demonstrates the levels some countries work at to ensure that all votes are accurately counted, and probably so.
And now you have moved the problem. Now you need to verify that the verification machine is also running the software you want and has also not been compromised. And you need to do this for every single voting machine in use, all of them.
With trillions of dollars riding on the result of an election, the motive for a group/nation to interfere is immense. Attacks against digital systems scale incredibly well, changing a handful of votes is barely different from changing all of them. This is not the case with physical votes, the more votes you want to change the more people you have to involve, and the likelihood you are caught goes up.
On your point about printing off a human readable copy that can be verified manually, you have now invented the worlds most expensive pencil. You’ll always want to verify the manual copy, so why bother with the computer one?
A fun fact about why pencils are used in voting in the UK is due to paranoia about pens being replaced with ones containing vanishing ink. There is no evidence this exists or has ever been done, but it demonstrates the levels some countries work at to ensure that all votes are accurately counted, and probably so.