SRP 기반의 DCAS 상호인증 및 키 관리 기법의 제안
Proposal of a Mutual Authentication and Key Management scheme based on SRP protocol
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초록
Conditional Access System (CAS) is a core security mechanism of IPTV SCP (Service and Content Protection) which enables only authenticated user to be able to watch the broadcasting contents. In the past, it was general that CAS was built in Set-Top Box (STB) as hardware or as a detachable cable card. However, numerous researches in Downloadable CAS (DCAS), where users can download CAS code in their STB through their network, have been recently conducted widely due to the lack of security and scalability problem. In this paper, the security requirements of OpenCable based DCAS which is typical example of downloadable IPTV SCP will be derived, the novel authentication and key management scheme will be proposed by using the Authentication Proxy (AP) which is the core DCAS. Also, the benefits of the proposed system will be evaluated by comparison and analysis with preceding research.
Abstract
Conditional Access System (CAS) is a core security mechanism of IPTV SCP (Service and Content Protection) which enables only authenticated user to be able to watch the broadcasting contents. In the past, it was general that CAS was built in Set-Top Box (STB) as hardware or as a detachable cable card. However, numerous researches in Downloadable CAS (DCAS), where users can download CAS code in their STB through their network, have been recently conducted widely due to the lack of security and scalability problem. In this paper, the security requirements of OpenCable based DCAS which is typical example of downloadable IPTV SCP will be derived, the novel authentication and key management scheme will be proposed by using the Authentication Proxy (AP) which is the core DCAS. Also, the benefits of the proposed system will be evaluated by comparison and analysis with preceding research.
참고문헌 (8)
- EBU Project Group B, "CA", Functional model of a conditional access system, 1995, ~
- OpenCable DCAS System Overview Technical Report, "Cable Television Laboratories,Inc", ~, pp.OC-TR-DCAS-D01-060 206 (2006)
- OpenCable DCAS Specifications, "Host Device 2.1 Core Functional Requirements", OC-SP-HOST2.1-CFR-I09-090904, ~ (2009)
- T.Wu, "The SRP Authentication and Key Exchange System", RFC 2945, ~ (2000)
- 한국전자통신연구원, "디지털케이블 방송망에서 다운로더블 제한수신시스템을 위한 상호인증 및 키 공유 방법과 장치", 국내특허 공개번호 10-2009 -0066178, ~ (2009)
- 김영수, "패스워드 인증 프로토콜 동향", 전자통신동향분석, 16(6), pp.41~48 (2001), 한국전자통신연구원
- 강성구, "안전한 다운로드 가능 제한 수신 시스템 제안 및 구현", 정보보호학회논문지, 19(6), pp.161~174 (2009), 한국정보보호학회
- Y.H.Jeong, "A Novel Protocol for Downloadable CAS", IEEE Transactions on Consumer Electronics, 54(3), pp.1236~1243 (2008)