Simple Hash Based Symmetric Encryption Mechanism for Dynamic Groups.

Security in Dynamic Groups is an open research problem in Mobile Adhoc Networks (MANETs) as users join/leave a group with insecure open wireless networks. To avoid information leakage in multicast communication during group dynamics, forward secrecy, and backward secrecy primitives to be ensured. In this context, a proper and secure group key is to be derived and updated whenever users join or leave the group. An efficient, simple, and secure symmetric multicast group encryption mechanism for group-oriented communications in MANETs is proposed and implemented with the derived group key. In this paper, the encryption mechanism for the “Multicast Symmetric Secret Key Management Scheme (MC-SSKMS)” is illustrated. This protocol provides O(1) computational overhead which is less than the other existing approaches and the results for both join and leave events are provided. [ABSTRACT FROM AUTHOR]