Efficient Conference Key Distribution for Dynamic Groups

Life of modern people is greatly influenced byte emerging technologies and tremendous growth of the internet. The growth of the Internet is the driving force behind many popular multicast based group applications like e-learning, conferencing, TV over Internet, interactive gaming etc. These group based are vulnerable to many attacks. The features that make multicast so applicative, in turn make security a challenging issue. The dynamic changes in the group membership with frequent joins and evictions are the prime factor which makes the security difficult in any group based applications. Key distribution and key management is the challenging issue with any of these applications. This paper describes a novel technique for secure distribution of the group key. The idea proposed in this paper makes use of the hybrid key trees which allow the complete elimination of the secure channels for the distribution of the key material unlike many of the earlier proposed schemes, minimum storage requirements at each member, elimination of the chances of generation of week keys, less number of rounds and minimum computational overhead.