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Séminaire
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SemSecuElec
Schindler-Itoh/Wiemers revisited: recovering full RSA/ECC private key from noisy side-channel observations
Orateur : Victor Lomné et Thomas Roche
Side-channel attacks on public-key cryptography (i.e. modular exponentiation for RSA or scalar multiplication for ECC) often boils down to distinguishing the 0s from the 1s in the binary representation of the secret exponent (resp. secret scalar).When state-of-the-art countermeasures are implemented, this detection must be errorless: thanks to masking techniques, erroneous masked exponents (resp.[…] -
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Séminaire
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SemSecuElec
Rank metric cryptography and its implementations
Orateur : Nicolas Aragon
In 2017, the NIST (National Institute for Standards and Technology) started astandardization process in order to select post-quantum encryption and digital signature schemes. Among the proposed solutions, two rank-metric based encryption schemes were selected for the second round of the standardization process: ROLLOand RQC.This raised questions about both the performance and the security of the[…] -
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Séminaire
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Cryptographie
Soutenance de thèse: Algebraic Cryptanalysis of the Shortest Vector Problem in Ideal Lattices
Orateur : Olivier Bernard - Rennes
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Séminaire
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Cryptographie
Isogenies over Hessian Model of Elliptic Curves
Orateur : Emmanuel Fouotsa - Université de Bamenda
In this talk we present explicit formulas for isogenies between elliptic curves in (twisted) Hessian form. We examine the numbers of operations in the base field to compute the formulas. In comparison with other isogeny formulas, we note that the obtained formulas for twisted Hessian curves have the lowest costs for processing the kernel and the X-affine formula has the lowest cost for processing[…] -
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Séminaire
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Cryptographie
Binary codes, hyperelliptic curves, and the Serre bound
Orateur : Ivan Pogildiakov - Rennes
TBA lien: https://seminaire-c2.inria.fr/ -
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Séminaire
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Cryptographie
New uses in Symmetric Cryptography: from Cryptanalysis to Designing
Orateur : Clémence Bouvier - INRIA
New symmetric primitives are being designed to be run in abstract settings such as Multi-Party Computations (MPC) or Zero-Knowledge (ZK) proof systems. More particularly, these protocols have highlighted the need to minimize the number of multiplications performed by the primitive in large finite fields.<br/> As the number of such primitives grows, it is important to better understand the[…] -