INTERNATIONAL JOURNAL OF RESEARCH IN COMPUTER APPLICATIONS AND ROBOTICS www.ijrcar.in Vol.2 Issue.2, Pg.: 133-141 February 2014 A.Vasanthi et al Page 133 INTERNATIONAL JOURNAL OF RESEARCH IN COMPUTER APPLICATIONS AND ROBOTICS ISSN 2320-7345 GROUP KEY MANAGEMENT SERVICES FOR NEXT GENERATION BROADCAST NETWORKS: IPTV A.Vasanthi 1 , T.Purusothaman 2 1. Department of CSE, BVRITH, Hyderabad, India, Vasanthi_gct@yahoo.co.in 2. Department of CSE&IT, Government College of Technology, Coimbatore, India, purushgct@yahoo.com Author Correspondence: Associate Professor, BVRITH, Hyderabad, 8885510777, vasanthi_gct@yahoo.co.in Abstract The next generation broadcasting networks is expected to be ruled by Internet Protocol Television (IPTV). IPTV uses IP Multicasting to disseminate multimedia contents to its large set of audience. Secure group communication plays a vital role in ensuring only the authorized customers receive the multimedia data. Key management is the indispensable defy in secure multicasting. Group key or session key is to be updated for every change in group membership. Applications like IPTV faces frequent change in membership. Batch rekeying can be an ideal solution. This paper concentrates on developing an ideal prototype for transmitting multimedia contents through secure multicasting. Queuing model based rekeying policy is proposed to reduce computational and communicational overhead. Keywords: Batch Rekeying, IPTV, Group Key Management, Queuing Model, Secure Multicasting 1. Introduction Predominantly the next generation television broadcasting is expected by means of packet switched network. The technological changes of communication and computing has stimulated increasing interest in the deliverance of TV services via the Internet Protocol (IP) Networks globally and the service is coined as Internet Protocol Television (IPTV). The triple play package which coalesce digital data, television broadcasting and data services together. When the data is transferred over the public network the security remains unanswered part. Adding with the triple play package it provides an interactive environment for the customers by promoting applications like CollaboraTV. The most exigent errand for IPTV, is broadcasting of the scheduled multimedia programs as per the subscription of user and broadcasting of on demand multimedia contents. Secure group communication plays a vital role to ensure the audio and visual contents are transmitted only to the subscribers. The different phases of broadcasting of multimedia contents in IPTV is shown in fig.1.1