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670 résultats

• • Séminaire

  • SemSecuElec

  Improved Blind Side-Channel Analysis by Exploitation of Joint Distributions of Leakages

  • 05 avril 2019

  • Faculté des sciences de Limoges - Salles Pétri/Turing

  Orateur : Léo Reynaud

  Les attaques side channel classiques nécessitent généralement la connaissance du clair (ou du chiffré) afin de calculer des données internes qui seront comparées à des fuites. Des attaques permettent cependant de s’affranchir de ces connaissances, les attaques par distributions jointes. Ces attaques supposent un attaquant capable d’inverser le modèle de consommation, mais aucune connaissance sur[…]

• • Séminaire

  • SemSecuElec

  One Fault Can Go A Long Way

  • 15 novembre 2019

  • Nanyang Technological University - Métivier

  Orateur : Shivam Bhasin

  *Abstract:* Fault attacks are considered among critical threat to embedded cryptography. This talk will be divided into in two parts. The first part of the talk will explore application of faults on advanced security primitives. We present persistent fault analysis introduced at CHES 2017 and its capability to bypass state of the art fault countermeasures as well as higher-order masking with one[…]

• • Séminaire

  • SemSecuElec

  Implémentations sécurisées et évaluation pré-silicium contre les attaques physiques.

  • 04 février 2022

  • Secure-IC - Web-conférence

  Orateur : Sofiane Takarabt

  Side-channel attacks remain a permanent threat against embedded systems, thus reliable protections should be implemented and must be minutely evaluated. In this presentation, we study different possible ways to evaluate against such threats. We show how an evaluation can be carried out to validate a security level of a protected hardware implementation. This approach allows us to estimate in[…]

• • Séminaire

  • SemSecuElec

  Schindler-Itoh/Wiemers revisited: recovering full RSA/ECC private key from noisy side-channel observations

  • 28 septembre 2018

  • NinjaLab - Salle Métivier

  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.[…]

• • Séminaire

  • SemSecuElec

  Rank metric cryptography and its implementations

  • 08 octobre 2021

  • XLIM – Université de Limoges - Salle Pétri/Turing

  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[…]

• • Séminaire

  • SemSecuElec

  Laser-Based Attacks Against FPGA Bitstream Encryption

  • 07 juin 2019

  • Technische Universität Berlin - Salles Petri/Turing

  Orateur : Heiko Lohrke

  Field programmable gate arrays (FPGAs) use encryption to protect the configuration data or “bitstream” containing the design to be run on the device. This encryption aims at protecting the intellectual property and other secrets contained in the bitstream and preventing e.g. cloning or tampering with an FPGA implementation.This talk will demonstrate how attackers can use failure analysis equipment[…]