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713 results
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Seminar
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SemSecuElec
Acquisition and Exploitation of Traces from Connected Devices
Speaker : Francesco Servida - École des Sciences Criminelles, Université de Lausanne
This presentation aims to give an overview of the traces that can be obtained from connected objects as witnesses or actors at a crime scene. Using several scenarios we cover the challenges of detecting connected devices, the relevant locations for data retrieval and the techniques for acquiring said data. We then present how such data can be useful in helping to understand the dynamics of events[…]-
SemSecuElec
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Embedded systems
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Seminar
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SemSecuElec
Understanding and fighting fault injections with programming languages
Speaker : Sébastien Michelland - Université Grenoble Alpes, Grenoble INP, LCIS
Would your latest program produce correct results if I skipped a statement in it? Two? Corrupted a variable at random? Then it might not be robust against _fault injection attacks_, which target hardware directly and have such effects. To be fair, nothing really resists them; still, efforts in designing protections have come a long way, relying (perhaps surprisingly) in large part on hardening[…]-
SemSecuElec
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Fault injection
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Seminar
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Cryptography
SCA-LDPC: A Code-Based Framework for Key-Recovery Side-Channel Attacks on Post-Quantum Encryption Schemes
Speaker : Denis Nabokov - Université de Lund
Whereas theoretical attacks on standardized crypto primitives rarely lead to actual practical attacks, the situation is different for side-channel attacks. Improvements in the performance of side-channel attacks are of utmost importance. In this paper, we propose a framework to be used in key-recovery side-channel attacks on CCA-secure post-quantum encryption schemes. The basic idea is to[…] -
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Seminar
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Cryptography
An extension of Overbeck’s attack with an application to cryptanalysis of Twisted Gabidulin-based schemes.
Speaker : Ilaria Zappatore - XLIM
In this talk, I will discuss the decoding of Gabidulin and related codes from a cryptographic point of view, pointing out that these codes can be decoded solely from the knowledge of a generator matrix. I will also present an extension of Gibson and Overbeck attacks on the generalized GPT encryption scheme (instantiated with the Gabidulin code) for different ranks of the distortion matrix. Finally[…] -
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Seminar
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Cryptography
Pseudorandom Correlation Generators from the Quasi-Abelian Decoding Problem
Speaker : Clément Ducros - IRIF
Secure multi-party computing often enhances efficiency by leveraging correlated randomness. Recently, Boyle et al. showcased the effectiveness of pseudorandom correlation generators (PCGs) in producing substantial correlated (pseudo)randomness, specifically for two-party random oblivious linear evaluations (OLEs). This process involves minimal interactions and subsequent local computations,[…] -
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Seminar
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Cryptography
On some efficiency aspects of the CKKS fully homomorphic encryption scheme
Speaker : Damien Stehlé - Cryptolab
Fully homomorphic encryption (FHE) is a form of encryption that allows arbitrary computations on data without requiring to decrypt the ciphertexts. Among the diverse FHE schemes, CKKS is designed to efficiently perform computations on real numbers in an encrypted state. Interestingly, Drucker et al [J. Cryptol.] recently proposed an efficient strategy to use CKKS in a black-box manner to perform[…] -