Enhancement of simple electro-magnetic attacks by pre-characterization in frequency domain and demodulation techniques

Olivier Meynard, Denis Réal, Florent Flament, Sylvain Guilley, Naofumi Homma, Jean Luc Danger

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Citations (Scopus)

Abstract

SPA/SEMA (Simple Power/Electro-magnetic Analysis) attacks performed on public-key cryptographic modules implemented on FPGA platforms are well known from the theoretical point of view. However, the practical aspect is not often developed in the literature. But researchers know that these attacks do not always work, like in the case of an RSA accelerator. Indeed, SEMA on RSA needs to make a difference between square and multiply which use the same logic; this contrast with SEMA on ECC, which is easier since doubling and add that are two different operations from the hardware point of view. In this paper, we wonder what to do if a SEMA fails to succeed on a device. Does it mean that no attack is possible? We show that hardware demodulation techniques allow the recording of a signal with more information on the leakage than a raw recording. Then, we propose a generic and fast method enabling to find out demodulation frequencies. The effectiveness of our methods is demonstrated through actual experiments using an RSA processor on the SASEBO FPGA board. We show cases where only demodulated signals permit to defeat RSA.

Original languageEnglish
Title of host publicationProceedings - Design, Automation and Test in Europe Conference and Exhibition, DATE 2011
Pages1004-1009
Number of pages6
Publication statusPublished - 2011 May 31
Event14th Design, Automation and Test in Europe Conference and Exhibition, DATE 2011 - Grenoble, France
Duration: 2011 Mar 142011 Mar 18

Publication series

NameProceedings -Design, Automation and Test in Europe, DATE
ISSN (Print)1530-1591

Other

Other14th Design, Automation and Test in Europe Conference and Exhibition, DATE 2011
CountryFrance
CityGrenoble
Period11/3/1411/3/18

Keywords

  • Demodulation
  • Modular Exponentiation
  • Mutual Information
  • Simple Electro-Magnetic Analysis

ASJC Scopus subject areas

  • Engineering(all)

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