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Caractérisation sécuritaire des mémoires magnétiques MRAM

Abstract : MRAM (magnetoresistive RAM) is an emergent non-volatile memory technology; it has the particularity to store data in magnetic moments orientations. It has very interesting characteristics that overwhelm mature technologies on several points. Crocus Technology is developing a new MRAM technology called TAS-MRAM (for Thermally Assisted Switching). During write operations, this new MRAM technology uses a current to heat the memory cell. This reduces the power consumption and makes scalability easier. TAS-MRAM are developed for secure or critical applications but this technology relies on spintronic, a field of physics not much studied for electronics security.This work aims to evaluate potential security weaknesses of this technology. More specifically the memory capacity to guarantee data confidentiality was studied. This work was divided in two parts; one part is dedicated to the analysis of MRAM resistance against physical perturbations, with a special focus on magnetic fields (both static and pulsed) effects on read and write operations as well as their effects on data retention. Various methods to reduce these effects were tested and compared. The effect of high temperature was also studied.The second part focuses on the analysis of electromagnetic emissions of the MRAM components during its operations. Methods to retrieve the Hamming weight of data written in the memory are exposed and compared.
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Submitted on : Friday, December 18, 2020 - 9:59:47 AM
Last modification on : Tuesday, January 18, 2022 - 2:06:25 PM
Long-term archiving on: : Friday, March 19, 2021 - 8:02:17 PM


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  • HAL Id : tel-03081278, version 1



Thomas Sarno. Caractérisation sécuritaire des mémoires magnétiques MRAM. Autre. Ecole Nationale Supérieure des Mines de Saint-Etienne, 2015. Français. ⟨NNT : 2015EMSE0796⟩. ⟨tel-03081278⟩



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