International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 04 Issue: 05 | May -2017 www.irjet.net p-ISSN: 2395-0072 © 2017, IRJET | Impact Factor value: 5.181 | ISO 9001:2008 Certified Journal | Page 1200 QUANTUM BASED ADAPTIVE TOPOLOGY CONTROL FOR INTRUSION DETECTION AND ISOLATION IN MANET E.Selvi 1 , M.S. Shashidhara 2 1 Asst. Professor, Department of Computer Science, Asan Memorial College of Arts and Science, Chennai, India. 2 Head of the Department, Department of MCA, The Oxford College of Engineering, Bangalore, India. ---------------------------------------------------------------------***--------------------------------------------------------------------- ABSTRACT:A mobile ad hoc network (MANET) is an infrastructure-less network where the number of mobile nodes is independently moved in a random direction within the transmission range of the network. Due to the movement of mobile nodes, the network topology is changed arbitrarily. Therefore, various intrusions are presented in MANET. For accurate and robust intrusion detection against several attack and deceiving actions, SIEVE technique was designed in MANET. However, node mobility of the ad hoc network restricts the BP algorithm efficiency and itǯs difficult to identify attack behavior. Therefore, security is a most important concern in decentralized structure of mobile network. In order to develop the intrusion detection and isolation in MANET, Quantum based Adaptive Topology Control (QATC) technique is developed. In QATC, an adaptive topology control is designed to adjust the transmission range of the mobile nodes to extend the lifetime of networks by retaining the network connectivity. This topology leaves maximum possible nodes connected in a cluster zone with minimum energy consumption and transmission interference. This helps to increase the packet delivery ratio. After this, the arriving and leaving nodes are monitored and the malicious node is identified from the network, through Quantum Mechanism. Quantum mechanism is typically used to detect the malicious node from the network using specific key distribution. Due to this, the malicious nodes are easily detected and isolated, aiming at improving the Malicious node detection rate with minimum time. A simulation result shows that the Quantum based Adaptive Topology Control (QATC) technique achieves higher packet delivery ratio, malicious node detection rate and reduces energy consumption, and time to identify the malicious node compared to state-of- the-works. KEYWORDS: Mobile ad hoc network (MANET), malicious node, Adaptive Topological Control, Quantum Mechanism, intrusion detection, intrusion isolation I.INTRODUCTION A mobile ad hoc network is an infra-structure less network which can establish the route path through collection of intermediate mobile nodes. In MANET, the mobile nodes are randomly moved in any direction. Due to the mobility of node, the transmission range of the networks is varied accordingly. By varying the transmission range, several intrusions continuously attack the network's accessibility through common techniques such as flooding, black hole and denial of service (DoS). The mobile nodes perform packet transmission from one end to another end with the mobility of nodes and due to this wide range of intrusion occurs in MANET. Therefore, several review techniques are expensively developed. MANET processed with two different types of modes such as single-hop and multi-hop. The nodes in MANETs assume that other nodes are always combined with each other to communicate data, which is exploited by malicious nodes and propagate intrusive attacks across the network. Intrusion detection system is developed for MANET to improve the security level and to detect the malicious attackers in the network. To obtain accurate and robust intrusion detection against several attack and deceiving actions, SIEVE technique was designed in [1] to infer Identity of Polluters in MANET by exploiting Rate less Codes and Belief Propagation (BP). The BP algorithm evaluates the identity of malicious nodes residing upon the network with simple pollution detection mechanism. SIEVE technique ensures multi-party download or collaboration attack detection with minimal computational, memory and communication resources. However, node mobility of the ad hoc network restricts the BP algorithm efficiency, as it affects key Pre- distribution, identifying routing mechanisms and attack behavior. To improve the routing performance in MANET, Energy-Aware Routing Algorithm was introduced in [2] along with RMECR and RMER. Reliable Minimum Energy Cost Routing (RMECR) addresses requirements of ad hoc