چکیده (انگلیسی):

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.