지금까지 제안된 많은 부채널 공격법(Side Channel Attack, SCA) 중 수집신호의 통계적 특성을 기반으로 하는 차분전력분석(Differential Power Analysis, DPA) 방법은 키를 해독하는 데 아주 효과적인 방법으로 알려져 있다. 그러나, 이 방법은 수집신호의 시간적인 동기 및 잡음에 따라 공격 성능에 상당한 영향을 받는다. 따라서 본 논문에서는 DPA에서 잡음에 의한 영향을 효과적으로 극복하는 새로운 방법을 제안하다. 제안된 방법의 성능은 DES 연산중인 마이크로 컨트롤러 칩의 전력소비 신호를 이용해서 기존 방식의 DPA와 시간 및 주파수 영역에서 비교한다. 실험을 통해 제안된 전처리 시스템의 성능 평가는 키 해독에 필요한 필요 평문의 수를 기준으로 계산할 경우, 기존의 방식과 비교하여 시간 영역에서 33%, 주파수 영역에서 50%의 성능이 개선되는 등 아주 우수한 결과를 보여주고 있다.
KSP Keywords
Differential Power Analysis, Side Channel Attacks
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