Séminaire


Date : 10 février 2022 14:00 - Salle :Salle du conseil

E-voting protocols - how to analyse the security of these (real-world) systems?


Alexandre DEBANT - LORIA Nancy

 

La présentation sera en présentiel ou en visio en fonction de la situation sanitaire.

 

For many years, e-voting protocols have been designed and formal methods (computational or symbolic) have been developed to prove the main properties that such systems must satisfy, e.g. vote secrecy and verifiability. Based on these security proofs, e-voting systems are now used (or ready to be) in our daily life for association elections, company elections, or even political elections (e.g. in Switzerland, Estonia, Australia…).
In this talk I will first introduce the topic of e-voting and how symbolic models can be used to provide security proofs. Then, I will discuss the accuracy of the models with respect to the real-world constraints that arise when these protocols are deployed in practice. To this aim, I will present new attacks we discovered. Finally, I will talk about some properties (e.g. cast-as-intended, accountability) which are at the limit of the state-of-the-art in symbolic analysis.