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Wombat Voting

Wombat Voting. Designed (2009-2010) Implemented (2010-2011) Deployed (1 x 2011, 2 x 2012). Project Participants. Amnon Ta Shma (TAU) Douglas Wikstrom (KTH) Ben Riva (TAU) Niko Farhi (TAU) Morgan Llewellyn (IMT Lucca) Jonathan Ben-Nun

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Wombat Voting

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  1. Wombat Voting Designed (2009-2010) Implemented (2010-2011) Deployed (1 x 2011, 2 x 2012)

  2. Project Participants Amnon Ta Shma (TAU) Douglas Wikstrom (KTH) Ben Riva (TAU) NikoFarhi (TAU) Morgan Llewellyn (IMT Lucca) Jonathan Ben-Nun IDC Students: TomerGabbai, Doron Sharon, ShiranKleiderman, IdoBergerfroind, AsafGamliel, Daniel Rapaport, OmriBaumer, AsafInger, EitanGrundland

  3. Main Objectives • Simple design • Voter privacy • End-to-end verifiability • No need to trust the designers! • Easy to use • Versatile • Paper backup

  4. Simple and Familiar

  5. System components • Dual ballot • Voting machine • Polling station committee • Public bulletin board • Mixnet Vote

  6. The Ballot א א

  7. Voting Booth • Vote selection • Ballot printing • Hardware • Touch screen • Printer

  8. Polling Station • Voter identification • Vote casting • Hardware • A desktop computer • 2D barcode scanner

  9. Website (Hebrew)

  10. Website (English)

  11. Election set-up

  12. Voting

  13. Tallying • Encrypted votes are mixed by the mixnet. • Mixed decrypted votes and proofs of correctness are published in the Bulletin board. • Paper votes may be tallied according to policy.

  14. Auditing • Auditing the machine (“cast as intended”): • Audit by users using Android application. • Random audit by designated auditors. • Auditing the bulletin board. • Android application. • Validation of mixnet proofs of correctness: • Built-in verifier. • 2 Independent verifiers.

  15. Verification (manual)

  16. Verification (phone)

  17. Behind the scenes Auditing the booth: cast-or-audit

  18. Behind the scenes Auditing the booth: cast-or-audit Auditing the tally: Verifiable Mixnet

  19. Elections with Wombat • IDC Student council elections: May 17-19 2011 • Meretz party chairman: February 7, 2012 • IDC Student council elections: May 21-23 2012

  20. IDC 2011 Elections • Non-profit college with ~6000 students. • 28 different races. • Students eligible to vote on multiple races. • 2097 students voted.

  21. Some Statistics • Voting took 1-2 minutes: • 30 Seconds for voter identification • 30 Seconds for scanning the ballot • 579 voters verified ballot at bulletin board • Students encouraged to verify with a coveted prize • (2 x faculty parking spots).

  22. Questionnaire • 403 students answered an on-line survey. • 78 answered a random exit survey. • Students encouraged to answer by offering prize. • High levels of voter satisfaction and confidence. • The processes of folding ballots and validating votes should be improved.

  23. Questionnaire • “How satisfied are you with your voting experience?” • “The Voting Process Was Clear and Simple”

  24. Meretz Party Leader • Party leader elected by party council consisting of 950 representatives. • Highly diverse set of voters: • Age (many over 50), gender, education, ethnicity… • 830 (88%) voted. • 23 voters verifiedtheir vote.

  25. IDC 2012 Elections • 2120 Students voted. • Only 16 students checked their votes.

  26. Difficulties & Lessons • Technical difficulties: • Electricity power loss. • Printer hanging. • Difficulties in folding the ballot. • Mitigated by volunteers instructing voters before entering the voting booth.

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  45. Website URL http://www.wombat-voting.com

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