Sayee Kumar, M. and

Abstract: In hasty growth of communication, security plays a central role in maintaining confidentiality of data in group communication. Keeping the data intended for the group in confidential manner is the most important security feature need to be sustained for the group communication. An efficient group key management mechanism named as Hybrid Broadcast Group Management Protocol (HBGMP) is devised based on the Reverse Function (RF) and Chinese Remainder Theorem (CRT). The distinctive security among the subgroups is ensured by the reverse function and the session ID of each subgroup is calculated by employing Chinese remainder theorem. By contraption, the Session ID using Chinese Remainder Theorem, with which a cohort of n users requires Sub Group Service Provider (SGSP) to do O (n/m) computation for communication and the storage cost are diminished by diverting the computing load of the Group Service Provider (GSP) into the SGSP. The significance of this protocol is the group member needs to store only two different values during the entire life span and also the rekey message is broadcasted which brings down the communication cost to O(1). The protocol is defined generally for any applications in hybrid architecture. The proposed architecture using CRT and Reverse function is scalable for hefty sized dynamically changing group