한국통신학회논문지 B : 네트워크 및 융합 서비스, v.29, no.3C, pp.426-435
ISSN
1226-4717
Publisher
한국통신학회 (KICS)
Language
Korean
Type
Journal Article
Abstract
AAA는 다양한 응용 서비스에 대한 신뢰성을 보장하기 위해 인증, 권한 검증, 과금 등의 기능을 제공하고 있으며, IETE에서는 차세대 AAA 프로토콜로 DIAMETER를 제안하고 있다. 또한 VoIP용 호 설정 프로토콜로서 제안된 SIP(Session Initiation Protocol)는 앞으로의 통신망에서 핵심기능을 담당할 것이며, SIP 서비스에 대한 신뢰성을 보장하기 위해서는 AAA와의 연동이 필요하다. 그러나 SIP에서 사용자 인증을 위한 digest 인증 메커니즘은 man-in-the-middle attack이나 dictionary attack에 취약성을 갖고 있다. 본 논문은 유무선 통합 시그널링 프로토콜로 정착될 SIP와 신뢰성 있는 서비스를 제공하기 위한 AAA 프로토콜인 DIAMETER 간의 인증 연동 방안과 인증 연동에서의 안전성을 분석하였다. 또한 보안상의 취약성 해결을 위해 주소 정보를 포함한 인증 정보의 생성 방안과 패스워드 기반의 상호인증 및 세션키 교환을 위해 AKE-ECC를 적용하는 방법을 제안하였다.
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