Ballot stuffing in a postal voting system

Véronique Cortier 1 Jérémie Detrey 2 Pierrick Gaudry 2 Frédéric Sur 3 Emmanuel Thomé 2 Mathieu Turuani 1 Paul Zimmermann 2
1 CASSIS - Combination of approaches to the security of infinite states systems
FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174), INRIA Lorraine, LORIA - Laboratoire Lorrain de Recherche en Informatique et ses Applications
2 CARAMEL - Cryptology, Arithmetic: Hardware and Software
Inria Nancy - Grand Est, LORIA - ALGO - Department of Algorithms, Computation, Image and Geometry
3 MAGRIT - Visual Augmentation of Complex Environments
INRIA Lorraine, LORIA - Laboratoire Lorrain de Recherche en Informatique et ses Applications
Abstract : We review a postal voting system used in spring 2011 by the French research institute CNRS and designed by a French company (Tagg Informatique). We explain how the structure of the material can be easily understood out of a few samples of voting material (distributed to the voters), without any prior knowledge of the system. Taking advantage of some flaws in the design of the system, we show how to perform major ballot stuffing, making possible to change the outcome of the election. Our attack has been tested and confirmed by the CNRS. A fixed postal voting system has been quickly proposed by Tagg Informatique in collaboration with the CNRS, preventing this attack for the next elections.
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Submitted on : Friday, July 29, 2011 - 8:41:05 AM
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Véronique Cortier, Jérémie Detrey, Pierrick Gaudry, Frédéric Sur, Emmanuel Thomé, et al.. Ballot stuffing in a postal voting system. Revote 2011 - International Workshop on Requirements Engineering for Electronic Voting Systems, 2011, Trento, Italy. pp.27 - 36, ⟨10.1109/REVOTE.2011.6045913⟩. ⟨inria-00612418⟩

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