Description
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. masked scalars) are useless.
In 2011, Schindler and Itoh tackle this issue and propose an algorithm to recover the unmasked exponent (resp. scalar) from many erroneous masked exponents (resp. masked scalars). Schindler and Wiemers improve these results in 2014 and then in 2017.
In our talk we will introduce the context of side-channel attacks over public-key cryptography, present the results of Schindler et al. and propose improvements.
Prochains exposés
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CHERI: Architectural Support for Memory Protection and Software Compartmentalization
Orateur : Robert Watson - University of Cambridge
CHERI is a processor architecture protection model enabling fine-grained C/C++ memory protection and scalable software compartmentalization. CHERI hybridizes conventional processor, instruction-set, and software designs with an architectural capability model. Originating in DARPA’s CRASH research program in 2010, the work has progressed from FPGA prototypes to the recently released Arm Morello[…]-
SoSysec
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SemSecuElec
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Compartmentalization
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Micro-architectural vulnerabilities
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Hardware architecture
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CHERI standardization and software ecosystem
Orateur : Carl SHAW - CODASIP
This talk will describe the current status of the RISC-V International standardization process to add CHERI as an official extension to RISC-V. It will then explore the current state of CHERI-enabled operating systems, toolchains and software tool development, focusing on the CHERI-RISC-V hardware implementations of CHERI. It will then go on to give likely future development roadmaps and how the[…]-
SoSysec
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SemSecuElec
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Compartmentalization
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Micro-architectural vulnerabilities
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PhaseSCA: Exploiting Phase-Modulated Emanations in Side Channels
Orateur : 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
Orateur : 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
Orateur : 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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