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We introduce Scantegrity II, a practical enhancement for optical scan voting systems that achieves increased election integrity through the novel use of confirmation codes printed on ballots in invisible ink. Voters mark ballots just as in conventional optical scan but using a special pen that develops the invisible ink. Verifiability of election integrity(More)
—Scantegrity II is an enhancement for existing paper ballot systems. It allows voters to verify election integrity—from their selections on the ballot all the way to the final tally—by noting codes and checking for them online. Voters mark Scant-egrity II ballots just as with conventional optical scan, but using a special ballot marking pen. Marking a(More)
On November 3, 2009, voters in Takoma Park, Mary-land, cast ballots for the mayor and city council members using the Scantegrity II voting system—the first time any end-to-end (E2E) voting system with ballot privacy has been used in a binding governmental election. This case study describes the various efforts that went into the election—including the(More)
All voter-verifiable voting schemes in the literature require that the voter be able to see and to mark. This paper describes modifications to the Prêt a ` Voter and PunchScan schemes so that a voter who can either see or hear, or both, independent of marking ability, may avail of voter-verifiability without revealing her vote. The modified systems would(More)
— This paper presents a case study of the E2E voting system Punchscan and its first use in a binding election. The election was held in March 2007 at the University of Ottawa for several offices within the university's graduate student association. This case study presents a walkthrough of the election and offers discussion as to how the voters and poll(More)
We present a new model for polling-booth voting: the voter enters the polling booth with a computational assistant which helps her verify that her vote is correctly recorded. The assistant interacts with the voting system while the voter votes on the machine in the polling booth. We present an independently-verifiable, coercion-resistant protocol based on(More)
We propose and implement a modification to the Punchscan protocol that simplifies ballot printing and distribution. In this improved version, each voter creates a ballot at the polling location by combining independently selected ballot halves, rather than using two pre-selected halves with the same serial number. The only time a ballot used for voting is(More)