무선환경은 가짜 클론 디바이스가 진짜인 것처럼 위장한 해킹공격에 매우 취약한 것으로 잘 알려져 있다. 그것은 단말기와 기지국(AP: Access Point)이 위변조가 쉬운 디바이스 식별자(예로 MAC(Medium Access Control) 주소, SSID, BSSID (Basic Service Set Identification) 등)를 이용하여 상호 인증하기 때문이다. 무선 핑거프린팅(Wireless Fingerprinting)은 통신과정에서 발생되는 무선신호 특성으로부터 디바이스를 고유하게 식별하는 핑거프린트를 추출하여 송신 디바이스가 가짜 클론 디바이스인지 아닌지 여부를 식별하는 기술이다. 본 기술은 무선물리계층 보안을 위한 인증 및 키 생성, 무선 침입탐지, 공격자의 위치/방향/거리 추적, 무선 포랜식 및 보안관제의 성능을 결정하는 핵심기술로 활용되고 있다. 향후 등장이 예상되는 M2M 무선랜, 무선인지네트워크, 무선센서, 무선차량통신, IoT 무선통신환경에서도 본 기술의 중요성은 더욱 증가하리라 본다. 본고에서는 무선 디바이스의 핑거프린팅 개념을 이해하고, 기술 분류에 따른 세부기법 연구 및 보안응용 동향을 분석함으로써 본 기술의 발전방향을 조망해보고자 한다.
KSP Keywords
Access point, Medium Access Control
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