Séminaire SemSecuElec : Deux exposés

La prochaine session du séminaire sécurité des systèmes électroniques embarqués aura lieu le vendredi 20 Décembre de 10h à 12h.
Le séminaire aura lieu dans les locaux de l'IRISA Rennes, salle Métivier.

Le programme de cette session est le suivant :

• 10h - 11h : François Sarrazin, Pierre Granier - University of Rennes, IETR (UMR 6164)
  • Titre : Remote data extraction through retroreflector hardware implants
  • Résumé : Electromagnetic leakage eavesdropping is an increasingly accessible attack vector due to the democratization of software-defined radio. "TEMPEST" attacks rely on passively listening to the unwanted electromagnetic emanations of a target (computer screen, low speed USB peripheral…) in order to retrieve the transmitted data. However, the range and properties of such leakages are unpredictable. Therefore, hardware implants have been designed to covertly extract data in a more controlled and covert manner compared to opportunistic leakage, in return for a more invasive attack. In this talk, we will focus on recent progress regarding the development of hardware Trojans based on backscattering methods to remotely extract data. In particular, the case of multi-Trojans allowing the taping of different sources will be presented.
• 11h - 12h : Licinius-Pompiliu BENEA - Univ. Grenoble Alpes, CEA, LETI
  • Titre : The influence of flicker noise on ring oscillator-based TRNGs
  • Résumé : Ring oscillators (ROs) are often used in true random number generators (TRNGs). The jitter of their clock signal, used as a source of randomness, stems from thermal and flicker noises. While thermal noise jitter is often identified as the main source of randomness, flicker noise jitter is not taken into account due to its autocorrelated nature which greatly complexifies modelling. However, it is a noise that has an increasingly large contribution as technology nodes decrease. This talk presents our recent work studying the influence of flicker noise on the entropy of a RO-based TRNG. The methodology is based on a phase noise emulator that integrates flicker and thermal noises, and generates jittered time series thus enabling the output of the TRNG (series of random bits) to be obtained. From this emulator, the impact of the flicker noise on the entropy can be quantified and analysed.