Secure and Efficient Access Control Protocol in Digital Broadcasting System

디지털 방송에서 안전하고 효율적인 접근 제어 프로토콜

  • 이지선 (고려대학교 BK21 유비쿼터스 정보보호 사업단) ;
  • 김효동 (아주대학교 미디어학부)
  • Received : 2009.10.29
  • Accepted : 2009.12.15
  • Published : 2010.03.28


IPTV is an emerging technology that combines both broadcasting and tele-communication technologies, and provides various multi-media contents to the service subscribers. In general, IPTV broadcasters transmit scrambled signals (multi-media contents) to the paying subscribers, and the users within the acknowledged network descramble the signals using the smart-card. That is, users are verified through communication between STB (Set-Top Box) and smart-card. In 2004, Jiang et al. proposed a secure protocol regarding the verification process. The method has been modified and enhanced by several following research works. However, all the methods that have been proposed so far required modular exponentiation operations which may raise the smart-card costs. In this paper, we propose a new efficient mutual authentication and session-key establishment protocol using only hash functions and exclusive-or operations, and show that the proposed protocol is still secure under various security attacks.


Digital Broadcasting;IPTV;Mutual Authentication;Key Exchange


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