There is no reason that open source code is better than closed source in this case.
How you voted must always remain a secret for obvious reasons. The ONLY real safeguard is the paper trail.
I WORKED with these machines and if so inclined I would have made malicious code that flips votes the way I wanted after 10 cast ballots to defeat whatever ridiculous Logic and Accuracy tests were thrown at the machine before deployment (We never went past one test vote).
Randomly pick a certain percentage of machines and compare the paper trail to the electronic tally. If Diebold had been confident of its machines then they would have insisted that this be the last step in any election.
