International Association for Cryptologic Research

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Paper: Novel Approaches for Improving the Power Consumption Models in Correlation Analysis

Authors:
Jessy Clédière
Thanh-Ha Le
Quoc-Thinh Nguyen-Vuong
Cécile Canovas
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URL: http://eprint.iacr.org/2007/306
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Abstract: Differential Power Analysis (DPA) is a powerful technique for revealing secret data of cryptographic algorithms such as DES, AES and RSA implemented on a specific platform. In recent years, Correlation Power Analysis (CPA) allowed to better formalize the differential approaches of DPA with the use of a power model. We propose here two methods in order to optimize the power model for the targeted bits of the analysed algorithm. We will consider that all the targeted bits do not give the same contribution to the power consumption. Our first method consists in finding out the optimal ratio among the bits of a specific device. The second method is based on a statistical analysis of attack results while applying different possible ratios among the bits. The experimental electromagnetic radiation signals intercepted from an ASIC during DES operations show that our proposed methods allow to improve significantly the attack performance.
BibTeX
@misc{eprint-2007-13586,
  title={Novel Approaches for Improving the Power Consumption Models in Correlation Analysis},
  booktitle={IACR Eprint archive},
  keywords={secret-key cryptography / side channel attack},
  url={http://eprint.iacr.org/2007/306},
  note={ thanhha.le@cea.fr, jessy.clediere@cea.fr 13733 received 8 Aug 2007},
  author={Jessy Clédière and Thanh-Ha Le and Quoc-Thinh Nguyen-Vuong and Cécile Canovas},
  year=2007
}