High-resolution side-channel attack using phase-based waveform matching

Naofumi Homma, Sei Nagashima, Yuichi Imai, Takafumi Aoki, Akashi Satoh

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

48 Citations (Scopus)


This paper describes high-resolution waveform matching based on aPhase-Only Correlation (POC) technique and its application for a side-channel attack. Such attacks, such as Simple Power Analysis (SPA) and Differential Power Analysis (DPA), use a statistical analysis of signal waveforms (e.g., power traces) to reduce noise and to retrieve secret information. However, the waveform data often includes displacement errors in the measurements. The use of phase components in the discrete Fourier transforms of the waveforms makes it possible to estimate the displacements between the signal waveforms with higher resolution than the sampling resolution. The accuracy of a side-channel attack can be enhanced using this high-resolution matching method. In this paper, we demonstrate the advantages of the POC-based method in comparison with conventional approaches through experimental DPA and Differential ElectroMagnetic Analysis (DEMA) against a DES software implementation on a Z80 processor.

Original languageEnglish
Title of host publicationCryptographic Hardware and Embedded Systems, CHES 2006 - 8th International Workshop, Proceedings
PublisherSpringer Verlag
Number of pages14
ISBN (Print)3540465596, 9783540465591
Publication statusPublished - 2006
Event8th International Workshop on Cryptographic Hardware and Embedded Systems, CHES 2006 - Yokohama, Japan
Duration: 2006 Oct 102006 Oct 13

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume4249 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Conference8th International Workshop on Cryptographic Hardware and Embedded Systems, CHES 2006


  • Cryptographic module
  • DEMA
  • DPA
  • Phase-only correlation
  • Side-channel attacks
  • Waveform matching


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