DRE-ip: A Verifiable E-Voting Scheme without Tallying Authorities

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Nearly all verifiable e-voting schemes require trustworthy authorities to perform the tallying operations. An exception is the DRE-i system which removes this requirement by pre-computing all encrypted ballots before the election using random factors that will later cancel out and allow the public to verify the tally after the election. While the removal of tallying authorities significantly simplifies election management, the pre-computation of ballots necessitates secure ballot storage, as leakage of precomputed ballots endangers voter privacy. In this paper, we address this problem and propose DRE-ip (DRE-i with enhanced privacy). Adopting a different design strategy, DRE-ip is able to encrypt ballots in real time in such a way that the election tally can be publicly verified without decrypting the cast ballots. As a result, DRE-ip achieves end-to-end verifiability without tallying authorities, similar to DRE-i, but with a significantly stronger guarantee on voter privacy. In the event that the voting machine is fully compromised, the assurance on tallying integrity remains intact and the information leakage is limited to the minimum: only the partial tally at the time of compromise is leaked.
Original languageEnglish
Title of host publicationESORICS 2016:
Subtitle of host publicationComputer Security – ESORICS 2016
Place of PublicationSwitzerland
Pages223-240
Number of pages13
Volume9879
ISBN (Electronic)978-3-319-45741-3
DOIs
Publication statusPublished - 2016
EventEuropean Symposium on Research in Computer Security - Heraklion, Greece
Duration: 26 Sept 201630 Sept 2016

Conference

ConferenceEuropean Symposium on Research in Computer Security
Abbreviated titleESORICS 2016
Country/TerritoryGreece
CityHeraklion
Period26/09/1630/09/16

Keywords

  • ELECTRONIC VOTING SYSTEM
  • privacy
  • verifiability
  • verifiable e-voting
  • ballot secrecy

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