Recent Blog Posts

It ain’t easy being green
08/22/2008
The original Scantegrity I article appeared in the May/June edition of IEEE Security and Privacy magazine. We noticed at the time that Scantegrity II co-author Ron Rivest is referenced in the cover art as a candidate on the DRE touch-screen menu. More ...
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Scantegrity on MSN
08/21/2008
MSN Tech & Gadgets mentions Scantegrity in an article titled “Click Here For President: The Future of Voting in America”: Voters make their mark alongside their choice for president with a special pen — and the pen reveals a randomized code. ...
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Scantegrity in MIT Technology Review
08/19/2008
The MIT Technology Review has a short article about Scantegrity II: Even optical scanners can misread stray marks, however, and any voting machine can be tampered with after the fact. But a cryptographic system developed under the leadership of ...
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Scantegrity II at EVT08
07/31/2008
We presented Scantegrity II at this year’s 2008 USENIX/ACCURATE Electronic Voting Technology Workshop (EVT ‘08). The paper can be read here [PDF]. Event Photos Photo: Me giving the talk at EVT08 Photo: Taking questions Photo: David ...
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What is Punchscan?

Punchscan is the first vote capture system to offer fully end-to-end (E2E) verifiability of election results. Punchscan moves beyond ordinary paper audit trails offering a far more robust and available way for voters to become involved in the election oversight process.


Election Day at the University of Ottawa
Punchscan runs the GSAED Election [More Details]

Punchscan Voting in a Nutshell

  • Voter experience: casting and checking your vote in a Punchscan election is easy! [View]
  • Punchscan on a sheet: see the Punchscan election process summarized on a single printable sheet of paper. [PDF] [PNG]

What is E2E, and why is it Important?

End-to-end cryptographic independent verification, or E2E, is a mechanism built into an election that allows voters to take a piece of the ballot home with them as a receipt. This receipt does not allow voters to prove to others how they voted, but it does permit them to:

  • Verify that they have properly indicated their votes to election officials (cast-as-intended).
  • Verify with extremely high assurance that all votes were counted properly (counted-as-cast).

Voters can check that their vote actually made it to the tally, and that the election was conducted fairly.

Punchscan is an international open-source project headed by esteemed cryptographer David Chaum and includes researchers from the University of Maryland-Baltimore County (UMBC), George Washington University (GWU), University of Ottawa (UO) and University of Waterloo (UW).