다양한 응용이 예상되는 물리적 복제방지 기능(PUF)은 각 디바이스별로 고유하고 복제 불가능한 특징으로 디지털 지문의 역할을 한다. PUF 구현 기법은 다양하게 존재할 수 있지만, 보안 디바이스에 사용하고자 할 때는 공통적으로 만족해야하는 보안 요구사항이 있다. 기존에는 PUF 출력에 대한 안정성과 유일성의 2개 특성 분석이 주를 이루었으나 최근 ISO/IEC JTC 1/SC 27/WG 3 표준그룹에서는 현실적인 활용상황에 맞게 보다 세분화하여 보안 요구사항을 정의하고 있다. 본 논문에서는 국제표준그룹에서 정의하고 있는 6개의 PUF 보안 요구사항과 시험방법을 소개하고자 한다.
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