For one thing, each party is assigned a specific row on the machine. Admittedly you can't verify, but it makes it relatively easy for someone else to verify the machine has been set up correctly.
And it seems to me your worry applies even more so to punch cards, and especially to touchscreens; both are susceptible to someone tossing in some code to randomly alter (or even more easily, invalidate) the vote.
There comes a point where you just have to trust. A paper record of your ballot would be nice, although it too has problems (many of the social engineering sort, which is one reason why there is pressure not to do this).
no subject
And it seems to me your worry applies even more so to punch cards, and especially to touchscreens; both are susceptible to someone tossing in some code to randomly alter (or even more easily, invalidate) the vote.
There comes a point where you just have to trust. A paper record of your ballot would be nice, although it too has problems (many of the social engineering sort, which is one reason why there is pressure not to do this).