Secured Message Distribution Based on Multi-bit Digital Signature in Mobile Ad-hoc Network

Route identification and digital signature has been considered in Mobile Ad hoc NETwork (MANET) for efficient message broadcasting. The integrity and authenticity through acknowledgement packets, forged acknowledgment attack is not possible due to dynamic traffics. In addition, the route identification usually filters out newly observed polluted nodes through digital signature scheme. Thus, the information state is obtained through Gittins index, because the traffic changes continuously and demand for security arises. In this paper, we propose a Sender Route Authentication with Multi-bit Digital Signature (SRA-MDS) model to improve security level during message broadcasting in MANET. Initially, the route authentication in MANET is verified through evaluate the confidence value and probability measure of the neighboring node that efficiently performs the route authentication to reduce the network overhead. Authenticated routes are selected for message broadcasting using authentication and verification algorithm, aiming at reducing the forged acknowledgement attacks. Broadcast message is finally secured on dynamically changing topology using Multi-bit Digital Signature generation. A single instance digital signature with multiple bits is used to highly secure the broadcasted message in SRAMDS model. Extensive performance analysis is performed to prove the effectiveness and strengths of the proposed message broadcasting model in MANET. Moreover, simulations were performed to measure several parameters, like the network overhead, secure message forwarding rate and acknowledgement attack rate. It shows that SRA-MDS model significantly reduces the network overhead, acknowledgement attack rate and improves secure message forwarding rate compared to the state-of-the-art works.