멀티캐스트 서비스들이 점차 다양해지고, 서비스 사용자의 폭도 넓어지고 있다. 이에 비례하여 공격자들의 주목을 받게되고 정보의 누출 가능성도 높아진다. 따라서 멀티캐스트 서비스 활용과 동시에 그에 대한 보안 연구도 함께 이루어져야 한다. 본 논문에서는 멤버의 동적인 가입 탈퇴가 발생하는 그룹에서 효율적인 그룹 관리를 적용하여 안전한 멀티캐스트 서비스를 제공할 수 있는 구조를 제안한다. 제안한 구조는 한 명의 송신자와 다수의 수신자로 구성된 멀티캐스트 통신 상황에서, 보안 측면을 고려하여 많은 이용자들에게 안전한 멀티캐스트 서비스를 제공할 수 있다. 시뮬레이션을 통하여 기존의 구조와 성능을 비교·분석한 결과, 제안하는 구조는 멤버 관리가 효율적이고, 전송 지연을 줄이면서 보다 안전하게 데이터를 전송할 수 있다는 것을 알 수 있었다.
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