본 논문에서는 이동 통신 환경에서 사용자가 다양한 서비스 제공자와의 효율적인 인증과 키 교환 프로토콜을 수행할 수 있는 새로운 프로토콜을 제시한다. 사용자의 이동성을 지원하기 위하여 이동 사용자가 방문하고 있는 도메인에서 사용할 수 있는 임시적인 인증서 발급 과정을 제안하였다. 제안된 임시 이동 사용자 인증서는 사용자가 방문하고 있는 도메인에 위치한 TTP의 비밀키로 전자서명이 이루어져서 사용자에게 발급이 이루어진다. 이동 사용자는 자신에게 발급된 임시 이동 사용자 인증서를 이용하여 이동 통신에서의 AIP(Authenticationandlnitializationofrayment) 프로토콜을 효율적으로 수행할 수 있다.
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