Description
The growth of embedded systems takes advantage of architectural advances from modern processors to increase performance while maintaining a low power consumption. Among these advances is the introduction of cache memory into embedded systems. These memories speed up the memory accesses by temporarily storing data close to the execution core. Furthermore, data from different applications share the same hardware resources, so the execution of one application affects the others. These interactions between applications give rise to cache-based side-channel attacks. This threat takes advantage of memory accesses to extract secret data executed by cryptographic applications. These attacks are well known on modern processors and have led to countermeasures designed for modern processors. These solutions are either not feasible on embedded systems due to their requirements or result in high additional costs. In this context, we present a countermeasure based on a fine-grained partitioning, so that an application can dynamically lock its data into the cache. Once a data is locked, no application can infer information about the memory accesses made to it. It provides strong security guarantees for critical program sections while introducing a low performance overhead (<4%) through a new hardware/software contract.
Practical infos
Next sessions
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PhaseSCA: Exploiting Phase-Modulated Emanations in Side Channels
Speaker : Pierre Ayoub - LAAS-CNRS
In recent years, the limits of electromagnetic side-channel attacks have been significantly expanded.However, while there is a growing literature on increasing attack distance or performance, the discovery of new phenomenons about compromising electromagnetic emanations remains limited. In this work, we identify a novel form of modulation produced by unintentional electromagnetic emanations: phase[…]-
Side-channel
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Conformité TEMPEST et compromission d’information au travers de l’arbre d’alimentation d’un équipement
Speaker : Tristan PECHERAU, David HARDY - Thalès
THALES conçoit des équipements cryptographiques et de radiocommunication tactiques, navales et aéronautiques, embarquant des éléments de chiffrement pour la sécurité des communications. Cette sécurité notamment d’un point de vue des émanations électromagnétiques est normée. Ces normes de sécurité de l’information, sont connues sous le nom de code “TEMPEST”, correspondant aux normes OTAN SDIP-27,[…] -
Prise de contrôle d’un infodivertissement automobile à distance
Speaker : Philippe Trebuchet, Guillaume Bouffard - ANSSI
Les véhicules connectés intègrent de nombreuses technologies de communications sans-fil à distance, comme celles exploitant les protocoles Bluetooth ou WiFi. Si le gain en confort d’utilisation et d’interaction est notable, la mise à disposition de ce type d’interfaces augmente les risques en matière de cybersécurité. Dans cet article, nous analysons l’implémentation de la pile Bluetooth embarquée[…]-
SemSecuElec
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Network
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Embedded systems
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