Figure 7 presents the control overhead occurred for both the techniques when the group size is increased. It can be seen that MBKM has 60% lesser overhead than the existing GKMPAN scheme, since does not use the traditional multicast tree structure which involves large number of nodes. Figure 9 presents the results for resilience for both the techniques when the group size is increased. It can be seen that MBKM has 27% lesser resilience than GKMPAN, since it has efficient rekeying technique.