Signal-to-noise ratio measurements of side-channel traces for establishing low-cost countermeasure design

Yusuke Yano, Kengo Iokibe, Yoshitaka Toyota, Toshiaki Teshima

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

5 Citations (Scopus)

Abstract

Improving the countermeasures against side-channel attacks (SCAs) increases the cost of both designing the countermeasures and evaluating SCA resistance. This may force cryptographic ICs to remain vulnerable. The increased cost is due to an indispensable procedure where a large number of side-channel traces need to be analyzed in order to evaluate the SCA resistance. In this work, a low-cost method to design and evaluate countermeasures using the signal-to-noise ratio (SNR) of side-channel traces as design and evaluation criteria is proposed. The method combines two existing methods: A prediction method of correlation coefficients between side-channel traces and a power model based on the SNR of the side-channel traces, and an estimation method of the number of traces needed to disclose the secret key based on the correlation coefficients. We construct a method to measure the SNR of side-channel traces and validate it for the design and evaluation criteria. In our method, the SNR is first calculated from signal and noise variances extracted from side-channel traces by increasing the number of averaging in side-channel trace measurements, and then the correlation coefficients and the number of traces for key-disclose are estimated on the basis of the calculated SNR. We confirmed that the estimated correlation coefficient and the number of traces for key-disclose were in good agreement with the corresponding measured ones. This result demonstrates that the proposed method can accurately measure the SNR of side-channel traces.

Original languageEnglish
Title of host publication2017 Asia-Pacific International Symposium on Electromagnetic Compatibility, APEMC 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages93-95
Number of pages3
ISBN (Electronic)9781538639122
DOIs
Publication statusPublished - Jul 11 2017
Event2017 Asia-Pacific International Symposium on Electromagnetic Compatibility, APEMC 2017 - Seoul, Korea, Republic of
Duration: Jun 20 2017Jun 23 2017

Other

Other2017 Asia-Pacific International Symposium on Electromagnetic Compatibility, APEMC 2017
CountryKorea, Republic of
CitySeoul
Period6/20/176/23/17

Keywords

  • AES
  • CPA
  • Evaluation cost
  • Side-channel attack
  • Signal-to-noise ratio

ASJC Scopus subject areas

  • Instrumentation
  • Radiation

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    Yano, Y., Iokibe, K., Toyota, Y., & Teshima, T. (2017). Signal-to-noise ratio measurements of side-channel traces for establishing low-cost countermeasure design. In 2017 Asia-Pacific International Symposium on Electromagnetic Compatibility, APEMC 2017 (pp. 93-95). [7975433] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APEMC.2017.7975433