Information about the PARC Forum and directions to PARC are available at: http://www.parc.xerox.com/events/forum/ The Battle for Accountability in Election Systems David L. Dill Stanford University Computer Science Department Touch-screen voting machines store records of cast votes in internal memory, where the voter cannot check them. Because of our system of secret ballots, once the voter leaves the polls there is no way anyone can determine whether the vote captured was what the voter intended. Why should voters trust these machines? Last December, I drafted a "Resolution on Electronic Voting" stating that every voting system should have a "voter verifiable audit...