Description
Electromagnetic fault injection (EMFI) is a well known technique to disturb the behavior of a chip and weaken its security. These attacks are still mostly done on simple microcontrollers since the fault effects is relatively simple and understood.
Unlocking EMFI on modern System-on-Chips (SoCs), the fast and complex chips ubiquitous today, requires to understand the impact of the faults. In this paper, we target the BCM2837 SoC with four Cortex-A53 cores from ARM. We propose an experimental setup and a forensic process to create exploitable faults and assess their impact on the micro-architecture.
The observed behaviors are radically different to what was previously obtained on microcontrollers. Subsystems (L1 caches, L2 cache, memory management unit (MMU)) can be individually targeted leading to new fault models. We highlight the differences in the fault impact with or without an Operating system (OS), therefore showing the importance of the software layers in the exploitation of a fault. The complexity and speed of a SoC does not protect them against hardware attackers, quite the contrary.
After describing the effect of faults on SoC caches and MMU, we propose countermeasures to protect the system against EMFI attacks.
Infos pratiques
Prochains exposés
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Sécurité physique du mécanisme d'encapsulation de clé Classic McEliece
Orateur : Brice Colombier - Laboratoire Hubert Curien, Université Jean Monnet, Saint-Étienne
Le mécanisme d'encapsulation de clé Classic McEliece faisait partie des candidats toujours en lice au dernier tour du processus de standardisation de la cryptographie post-quantique initié par le NIST en 2016. Fondé sur les codes correcteurs d'erreurs, en particulier autour du cryptosystème de Niederreiter, sa sécurité n'a pas été fondamentalement remise en cause. Néanmoins, un aspect important du[…]-
SemSecuElec
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Implementation of cryptographic algorithm
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Double Strike: Breaking Approximation-Based Side-Channel Countermeasures for DNNs
Orateur : Lorenzo CASALINO - CentraleSupélec
Deep neural networks (DNNs) undergo lengthy and expensive training procedures whose outcome - the DNN weights - represents a significant intellectual property asset to protect. Side-channel analysis (SCA) has recently appeared as an effective approach to recover this confidential asset of DNN implementations. Ding et al. (HOST’25) introduced MACPRUNING, a novel SCA countermeasure based on pruning,[…]-
SemSecuElec
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Side-channel
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Protection des processeurs modernes face à la vulnérabilité Spectre
Orateur : Herinomena ANDRIANATREHINA - Inria
Dans la quête permanente d'une puissance de calcul plus rapide, les processeurs modernes utilisent des techniques permettant d'exploiter au maximum leurs ressources. Parmi ces techniques, l'exécution spéculative tente de prédire le résultat des instructions dont l'issue n'est pas encore connue, mais dont dépend la suite du programme. Cela permet au processeur d'éviter d'être inactif. Cependant,[…]-
SemSecuElec
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Micro-architectural vulnerabilities
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