• Gauri Upadhyay
• Aditya Kumar
• Aradhana Sahu

This Mobile ad hoc networks (MANETs) are composed of independent and self organized nodes without the need of any infrastructure. Mobile ad hoc networks consist of mobile devices that are freely moving inside and outside in the network. These devices can operate as a host, a router or both at the same time. These nodes have the ability to organize themselves because of their self configurable capability; they can be organized immediately without the help of any infrastructure. Due to various features like open medium, dynamic topology, lack of defensive mechanism, makes MANET more susceptible to security problems and attacks. Ad hoc On-Demand Distance vector routing protocol (AODV) is one of the best and most popular routing protocols in MANET. This routing protocol is frequently affected by well known black hole attack in which it injects a forged route reply message that considers as it has a fresh enough route to destination node. In this research work a “Digital Signature Authentication Scheme (DSAS) to detect black hole attack in MANETs” is proposed using AODV routing protocol to implement black hole attack in NS-2 and measure its impact on the performance of AODV routing protocol by using different performance metrics like Packet Delivery Ratio, Average End-to-End Delay, Average Throughput, Normalized Routing Load, and Routing Overhead. The proposed work is implemented in NS-2 using AES symmetric cryptographic technique and digital signature schemes to secure AODV routing protocol of MANET from black hole attack. The proposed method DSAS_AODV is compared with existing Secure_AODV method and simulative results shows that DSAS_AODV is better than Secure_AODV 7.2% in terms of Packet Delivery Ratio, 10.257% in terms of End-to-End Delay, 9.79 % in terms of Throughput, 6.396% in terms of Normalized Routing Load and 3.047% in terms of Routing Overhead.

Wireless Networks, MANET, AODV, black hole, AODV, Digital Signature, Hash Function, AES

"Digital Signature Authentication Scheme (DSAS) to detect Blackhole attack in MANETs ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.106-119, May-2019, Available :http://www.jetir.org/papers/JETIR1905921.pdf

"Digital Signature Authentication Scheme (DSAS) to detect Blackhole attack in MANETs ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp106-119, May-2019, Available at : http://www.jetir.org/papers/JETIR1905921.pdf