본 연구는 해킹 기법을 이용한 실질적인 내부 네트워크의 보안 수준을 평가하는 방법을 제시하였다. 제안하는 방법은 기본적인 네트워크 모델을 지대별 및 공격 경로로 분리한 후, 해킹 및 해커 수준의 분류를 바탕으로 한 해킹 시나리오 분석에 의해서 내부 네트워크를 평가하도록 구성하였다. 따라서, 본 연구는 네트워크 모델과 해킹 시나리오의 두 가지의 기준에 따라 실질적인 내부망의 보안 수준을 평가하는 방법이다. 이러한 적극적인 보안 수준 평가 방법의 목적은 실제적인 내부망의 보안 수준을 평가하여 네트워크 구축 및 유지 보수에 필요한 보안성의 강화를 추구하고자 한다. 본 논문에서는 ISL1∼ISL5의 5개 등급으로 보안 수준을 분리하였으며, ISL5의 보안 수준을 가장 고수준으로 평가하였다. 본 연구에서는 ISL3용 테스트베드를 설계하고 분석하였다.
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