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Vote-Independence: A Powerful Privacy Notion for Voting Protocols

  • Jannik Dreier
  • Pascal Lafourcade
  • Yassine Lakhnech
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6888)

Abstract

Recently an attack on ballot privacy in Helios has been discovered [20], which is essentially based on copying other voter’s votes. To capture this and similar attacks, we extend the classical threat model and introduce a new security notion for voting protocols: Vote-Independence. We give a formal definition and analyze its relationship to established privacy properties such as Vote-Privacy, Receipt-Freeness and Coercion-Resistance. In particular we show that even Coercion-Resistant protocols do not necessarily ensure Vote-Independence.

Keywords

Electronic Voting Privacy Anonymity Security Formal Verification Coercion-Resistance Receipt-Freeness 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Jannik Dreier
    • 1
  • Pascal Lafourcade
    • 1
  • Yassine Lakhnech
    • 1
  1. 1.Université Grenoble 1, CNRSVerimagFrance

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