naa a22 4500 510798411 CHVBK 20180411083345.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s11277-012-0910-1 doi (NATIONALLICENCE)springer-10.1007/s11277-012-0910-1 An Enhanced Hierarchical Key Management Scheme for MANETs [Elektronische Daten] [Mohamed Elaskily, Hamdy Kelash, Hala El-sayed, Osama Faragallah] Security is one of the major issues in Mobile Ad-hoc Networks (MANETs). Their natural characteristics make them vulnerable to numerous severe attacks. In this paper, we present an enhanced hierarchical key management scheme for secure group communications in MANETs. The proposed approach primarily aims at improving security and complexity, especially complexity in the level of ordinary members for joining or leaving processes to achieve the most possible dynamic characteristic of MANETs without neglecting network security. The proposal scheme is designed with the potential of developing an efficient model interested in keying applied on hierarchical structure to increase the security and make no need to apply rekeying of all group members in different sub-levels as made by hierarchical key management scheme (HKMS). Also, it reduces complexity of processing load, memory usage and improves resources. In the proposed model, each communication between two nodes have a unique key to make it more secure with encrypting messages by different keys for more than one time and support node flexibility. Experiments are carried out on the proposed scheme to show the effect of complexity on each node in different grades and results are compared with traditional HKMS. Springer Science+Business Media New York, 2013 Group communication nationallicence Mobile ad-hoc network nationallicence Network security nationallicence Elaskily Mohamed Faculty of Electronic Engineering, Menoufia University, 32952, Menouf, Egypt aut Kelash Hamdy Faculty of Electronic Engineering, Menoufia University, 32952, Menouf, Egypt aut El-sayed Hala Faculty of Engineering, Menoufia University, Shebin El-kom, Egypt aut Faragallah Osama Faculty of Electronic Engineering, Menoufia University, 32952, Menouf, Egypt aut Wireless Personal Communications Springer US; http://www.springer-ny.com 72/4(2013-10-01), 1783-1800 0929-6212 72:4<1783 2013 72 11277 https://doi.org/10.1007/s11277-012-0910-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0910-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Elaskily Mohamed Faculty of Electronic Engineering, Menoufia University, 32952, Menouf, Egypt aut NATIONALLICENCE 700 1- Kelash Hamdy Faculty of Electronic Engineering, Menoufia University, 32952, Menouf, Egypt aut NATIONALLICENCE 700 1- El-sayed Hala Faculty of Engineering, Menoufia University, Shebin El-kom, Egypt aut NATIONALLICENCE 700 1- Faragallah Osama Faculty of Electronic Engineering, Menoufia University, 32952, Menouf, Egypt aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 72/4(2013-10-01), 1783-1800 0929-6212 72:4<1783 2013 72 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer