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Paper 2009/161

Built-in Determined Sub-key Correlation Power Analysis

Yuichi Komano and Hideo Shimizu and Shinichi Kawamura

Abstract

Correlation power analysis (CPA) is a well-known attack against cryptographic modules with which an attacker evaluates the correlation between the power consumption and the sensitive data candidate calculated from a guessed sub-key and known data (plaintext or ciphertext). This paper enhances CPA to propose a new general power analysis, \textit{build-in determined sub-key CPA} (BS-CPA), that finds a new sub-key by using the previously determined sub-keys recursively to compute the sensitive data candidate and to increase the signal-to-noise ratio in its analysis. BS-CPA is powerful and effective when the multiple sbox outputs (or corresponding data) are processed simultaneously as in the hardware implementation. We apply BS-CPA to the power consumption traces provided at the DPA contest and succeed in finding DES key less than the original CPA does.

Metadata
Available format(s)
PDF PS
Category
Implementation
Publication info
Published elsewhere. Unknown where it was published
Keywords
Side channel attacksPower analysisCPAHamming weight and Hamming distance modelsDPA contestDES
Contact author(s)
yuichi1 komano @ toshiba co jp
History
2009-08-03: revised
2009-04-07: received
See all versions
Short URL
https://ia.cr/2009/161
License
Creative Commons Attribution
CC BY
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