Description
We will focus on this talk on electronic voting which emulates traditional voting in a networked environment. We will first introduce the model of electronic voting. In particular, we will present the security requirements that an electronic voting system must fulfil in order to be a proper substitute for a paper-ballot system. We will also briefly review the cryptographic tools generally used to design secure electronic voting systems.<br/> We will then address some particular drawbacks of usual e-voting systems and show that recent works give serious hope to overcome them -or, on the contrary, annihilate such a hope. In particular, we will briefly present some methods which allow to detect when voting machines (or softwares) are misbehaving. By using them, it is possible to achieve the "What You See Is What You Vote for" property without performing a complex and costly security evaluation of these machines (or softwares). We will next briefly explain how to render useless all kind of coercive attacks (how to ensure that a vote is free, i.e. not constrained) in the context of on-line voting. Finally, we will also give evidence that the "perfect system" cannot exist, by mentioning some impossibility results from WOTE'06. In particular, perfect ballot secrecy and "universal" verifiability of the outcome of the election cannot be satisfied at the same time. We will conclude our presentation with a discussion of ongoing research on the area of e-voting protocols.
Prochains exposés
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Présentations des nouveaux doctorants Capsule
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2 nouveaux doctorants arrivent dans l'équipe Capsule et présenteront leurs thématiques de recherche. Alisée Lafontaine, encadrée par André Schrottenloher, présentera son stage de M2: "Quantum rebound attacks on double-block length hash functions" Mathias Boucher, encadré par Yixin Shen, parlera des algorithmes quantiques et des réseaux euclidiens. -
Design of fast AES-based Universal Hash Functions and MACs
Orateur : Augustin Bariant - ANSSI
Ultra-fast AES round-based software cryptographic authentication/encryption primitives have recently seen important developments, fuelled by the authenticated encryption competition CAESAR and the prospect of future high-profile applications such as post-5G telecommunication technology security standards. In particular, Universal Hash Functions (UHF) are crucial primitives used as core components[…]-
Cryptography
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Lie algebras and the security of cryptosystems based on classical varieties in disguise
Orateur : Mingjie Chen - KU Leuven
In 2006, de Graaf et al. proposed a strategy based on Lie algebras for finding a linear transformation in the projective linear group that connects two linearly equivalent projective varieties defined over the rational numbers. Their method succeeds for several families of “classical” varieties, such as Veronese varieties, which are known to have large automorphism groups. In this talk, we[…]-
Cryptography
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Some applications of linear programming to Dilithium
Orateur : Paco AZEVEDO OLIVEIRA - Thales & UVSQ
Dilithium is a signature algorithm, considered post-quantum, and recently standardized under the name ML-DSA by NIST. Due to its security and performance, it is recommended in most use cases. During this presentation, I will outline the main ideas behind two studies, conducted in collaboration with Andersson Calle-Vierra, Benoît Cogliati, and Louis Goubin, which provide a better understanding of[…]