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Detecting compromised ballots

  • US 20070189519A1
  • Filed: 08/29/2006
  • Published: 08/16/2007
  • Est. Priority Date: 03/24/2000
  • Status: Abandoned Application
First Claim
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1. A method in a data processing system for discerning corruption of an electronic ballot, comprising:

  • in a voter computer system;

    receiving a ballot choice selected by a voter from among a set of valid ballot choices;

    encoding the received ballot choice in a ballot;

    encrypting the ballot;

    constructing a validity proof proving that the encrypted ballot corresponds to a valid ballot choice;

    sending the encrypted ballot and the validity proof to a vote collection center computer system;

    in the vote collection center computer system;

    receiving the encrypted ballot and validity proof;

    verifying the validity proof;

    only if the validity proof is successfully verified;

    without decrypting the encrypted ballot, generating an encrypted vote confirmation of the encrypted ballot;

    sending the encrypted vote confirmation to the voter computer system;

    in the voter computer system;

    receiving the encrypted vote confirmation;

    decrypting the encrypted vote confirmation to obtain a vote confirmation;

    displaying the obtained vote confirmation; and

    if a confirmation dictionary in the user'"'"'s possession does not translate the displayed vote confirmation to the ballot choice selected by the voter, determining that the ballot has been corrupted.

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