ADVISEDLY DELAYED PACKET ATTACK ON TCP-BASED MOBILE AD-HOC NETWORKS

Abstract

Efficient routing in mobile ad-hoc networks (MANETs) is a challenging task due to its varying physical channel characteristics, dynamic topology and un-centralized communication. Furthermore, multihop routing is required when the source-destination pairs are not in each other’s communication range. Due to the above challenges these networks are vulnerable to various types of attacks on various layers of the TCP/IP protocol stack. In this thesis, we implement and analyze an attack called advisedly delay packet attack on ad-hoc on-demand distance vector (AODV) routing protocol. The advisedly delay packet attack is an attack that effects the TCPbased as well as UDP-based data transmissions but in this thesis we will also see how it exploits the TCP congestion control mechanism to decrease the throughput of the network. In this attack, the attacker exploit the period of retransmission time out (RTO) of the sender and attack in such a way so the sender is always transmitting in the slow start phase. KeywordsMANETs; Multimedia Streaming; Routing protocols; QoS; Topology; Node Mobility; Network Scalability ----------------------------------------------------------------------***-----------------------------------------------------------------------