A Novel Method For Security Enhancement In Manet
Fully self-organized mobile ad hoc networks (MANETs) represent complex distributed systems that may also be
part of a huge complex system, such as a complex system-of-systems used for crisis management operations. Due to the
complex nature of MANETs and its resource constraint nodes, there has always been a need to develop lightweight security
solutions. Since MANETs require a unique, distinct, and persistent identity per node in order for their security protocols to
be viable, Sybil attacks pose a serious threat to such networks. A Sybil attacker can either create more than one identity on a
single physical device in order to launch a coordinated attack on the network or can switch identities in order to weaken the
detection process, thereby promoting lack of accountability in the network. In this research, we propose a lightweight
scheme to detect the new identities of Sybil attackers without using centralized trusted third party or any extra hardware,
such as directional antennae or a geographical positioning system. Through the help of extensive simulations and real-world
test bed experiments, we are able to demonstrate that our proposed scheme detects Sybil identities with good accuracy even
in the presence of mobility.
Index Terms- Identity-based attacks, intrusion detection, mobile ad hoc networks, Sybil attacks.