In this paper, we propose a multi server architecture that uses LKH and dynamic split and merge for group key management to improve the packet delivery ratio. The proposed system utilizes the dynamic split and merge with low overhead where a physical server adaptively splits and merges its traffic into multiple groups each served by a dedicated server so as to improve the packet delivery ratio. We compare the performance of this proposed approach with that of the single server case. Our results show that multi server architecture scales well as compared with the traditional approaches.