On Necessary and Sufficient Conditions for Private Ballot Submission

  title={On Necessary and Sufficient Conditions for Private Ballot Submission},
  author={David Bernhard and Olivier Pereira and Bogdan Warinschi},
  journal={IACR Cryptology ePrint Archive},
We exhibit the precise security guarantees that a public key encryption scheme needs to satisfy to guarantee ballot privacy when used in a large class of voting systems. We also identify new security notions for public key encryption that characterize the number of times that a public key can be used in different elections, and show that the most common ballot preparation approach that consists in encrypting the vote and adding a NIZK proof of its validity is sound, even without hardwiring the… CONTINUE READING
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