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      • Non-Profiling Singular Spectrum Analysis 전처리 기법

        조영진(Young-Jin Cho),원유승(Yoo-Seung Won),박애선(Ae-Son Park),한동국(Dong-Guk Han) 대한전자공학회 2016 대한전자공학회 학술대회 Vol.2016 No.6

        Side Channel Analysis is powerful attack to recover the secret key by using an extra source of information such as timing, power consumption and electromagnetic leakage. Pre-processing scheme is used to retrieve the secret key in the restricted traces in order to improve the attack performance. One of the pre-processing schemes is Singular Spectrum Analysis, which makes the original traces can be split into main signal traces and noise signal traces. In order to diminish cost of SSA, the adversary should choose the criteria to split actual power consumption into two groups according to degree of noise. In previous paper, the criteria is selected as Signal-to-Noise Ratio (SNR) which is one of profiling schemes. In this paper, in order to use SSA practically, we propose that Normalized Inter-Class Variance (NICV) which is adopted as the criteria is non-profiling scheme doesn"t need to secret key. More precisely, we can distinguish the main signal with the scale of NICV. We demonstrate that our proposal attack method yields significantly similar results with another method using SNR through actual experiments on MSP430 microcontroller unit.

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