Enhancement of Hierarchical Key Management Scheme of Secure Multicast Transmission for Overlay Networks

Group communication security is needed to protect sensitive information. A group key is shared by all users under secure group communication model. The group key is used to encrypt data transmitted to the group. The group membership is dynamic and requires new key for membership changes. Secure multicast transmission schemes are used to transfer data to a set of nodes. Membership in secure multicast groups is dynamic and requires multiple updates in a single time frame. Storage cost and rekeying cost are considered in the secure multicast transmission. The system manages long standing members and shortly lived members separately. Long standing members need to store smaller number of keys than short-lived members. The system manages variable storage levels for key management. Hierarchical key management algorithm is used to manage group key values. The system manages membership addition and removes operations. The key management scheme is not optimized for overlay networks, End node based multicast transmission is not optimized, Traffic overhead is high and Transmission and listen mode energy levels are not managed problems are identified from the existing security models. The secure multicast transmission supports key management under multicast groups. The storage and key revocation operations are managed by the system. The system is enhanced to manage keys under overlay networks. The traffic and energy control mechanisms are integrated with the system. The system is designed to manage storage and key revocation process. Multicast group and key management operations are integrated in the system. The system is enhanced to manage group keys under overlay network environment. The key management messages are controlled in the system.