Secure multicast in IPTV services

Abstract

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On performance of group key distribution techniques when applied to IPTV services

“…In [3] we showed that our group key management solution requires less bandwidth than current solutions present in H + E -literature. Typical IPTV services use one DEK per video channel and refresh them frequently, leading to a high usage of network resources.…”

“…In this paper we have extended our solution presented in [3] to support user generated video channels and to impose IP multicast admission control. A user behaving as a video source can obtain VEKs for his video channels and distribute them to restricted groups of receivers, triggering the system to automatically adapt to this new channel.…”

“…When considering the applicability of these key distribution types to IPTV services, we identified [3] the centralized and decentralized as the types more adequate to IPTV services.…”

“…In what concerns security, common IPTV services use one key for each video channel. In this work we extend our previous secure multicast technique [3] by adding the support for multicast admission control and user generated groups. The video channels are generated by Video Servers (VS) to groups of Set-Top Boxes (STB).…”

“…Secure IP multicast [3][4][5] may be used to support the secure transmission of IP packets to groups of receivers in IPTV services but neglects access control and network management. Key distribution solutions for secure group communications usually apply key refreshing techniques upon a group change (member join or leave) in order to impose both perfect forward and backward secrecy.…”