Security and Privacy Issues in Wireless Mesh Networks: A Survey

This book chapter identifies various security threats in wireless mesh network (WMN). Keeping in mind the critical requirement of security and user privacy in WMNs, this chapter provides a comprehensive overview of various possible attacks on different layers of the communication protocol stack for WMNs and their corresponding defense mechanisms. First, it identifies the security vulnerabilities in the physical, link, network, transport, application layers. Furthermore, various possible attacks on the key management protocols, user authentication and access control protocols, and user privacy preservation protocols are presented. After enumerating various possible attacks, the chapter provides a detailed discussion on various existing security mechanisms and protocols to defend against and wherever possible prevent the possible attacks. Comparative analyses are also presented on the security schemes with regards to the cryptographic schemes used, key management strategies deployed, use of any trusted third party, computation and communication overhead involved etc. The chapter then presents a brief discussion on various trust management approaches for WMNs since trust and reputation-based schemes are increasingly becoming popular for enforcing security in wireless networks. A number of open problems in security and privacy issues for WMNs are subsequently discussed before the chapter is finally concluded.Comment: 62 pages, 12 figures, 6 tables. This chapter is an extension of the author's previous submission in arXiv submission: arXiv:1102.1226. There are some text overlaps with the previous submissio

An Optimised and Efficient Routing Protocol Application for IoV: A Review

Mobile ad hoc network (MANET) is a wireless network without a centralised administrator, where each node acts as a router forwarding data packets to other nodes. The study compares the performance of three routing protocols (AODV, OLSR, and DSDV) using the NS2 simulator under various mobility models. The proposed work introduces a modified protocol, MAODV, which combines the features of AODV protocols to optimise energy consumption, minimise transmissions, and find an optimum path for data transmission. The proposed method is compared with the standard AODV protocol. It shows better average throughput and packet delivery ratio results in a vehicular ad hoc network (VANET) scenario

MITIGATING NODE ISOLATION ATTACK IN OLSR PROTOCOL USING DCFM TECHNIQUE

A Mobile Ad Hoc Network (MANET) is a collection of mobile devices which are connected by wireless links without the use of any fixed infrastructures or centralized access points. The Optimized Link State Routing (OLSR) protocol is an important proactive routing protocol designed for mobile ad hoc networks. It employs periodic exchange of messages to maintain topology information of the network at each node. Based on topology information, each node is able to calculate the optimal route to a destination. One major DoS attack against the Optimized Link State Routing protocol (OLSR) known as the node isolation attack occurs when topological knowledge of the network is exploited by an attacker who is able to isolate the victim from the rest of the network and subsequently deny communication services to the victim. The proposed method named Denial Contradictions with Fictitious Node Mechanism (DCFM) relies on the internal knowledge acquired by each node during routine routing, and augmentation of virtual (fictitious) nodes. Moreover, DCFM utilizes the same techniques used by the attack in order to prevent it. DCFM successfully prevents the attack, specifically in the realistic scenario in which all nodes in the network are mobile

A Study on Preventing Node Isolation Attack in OLSR Protocol

AbstractA mobile ad hoc network (MANET) is a wireless communication system of continuously self-configuring and infrastructure-less network of mobile devices which can move independently in any direction at any time.Routing protocols is required for message exchange in MANET. The most widely used routing protocol is OLSR (Optimized Link State Routing Protocol). It is efficient in bandwidth utilization and path calculation. But it is vulnerable to many types of attacks. In this paper, we discuss about various methods used to prevent a type of Denial of Service (DoS) attack called the node isolation attack that is capable to compromise OLSR protocol

A Survey on Various Routing Protocols in Manet with Various Protection Schemes

A MANET is a dynamic collection of the wireless mobile devices that can communicate and move at the same time. The demand of MANET is increasing due to its application in the various fields such as the military and commercial operations, sensor networking, flood affected areas etc. This is so, as the MANET nodes can communicate through wireless links and transfer the data packets from one point to another. But, the main challenge in MANET is to design the robust security solution that may protect the MANET from various routing attacks. Without any centralized administration, these mobile nodes are placed at different ranges in a particular defined area. Flooding attack is kind of the security threat in which source node sends huge amount of data, Root Request (RREQ) and Sync packet to destination node, due to which the receiver shall not work properly as it would be engaged in receiving the excessive amount of data, RREQ and Sync packets from the attacker. To attain the optimal improved results, various routing protocols are implemented and used. In this paper we shall discuss various attacks such as Black Hole, Gray Hole attack & various prevention schemes like OSPF, RIP, IGRP, and EIGRP to protect it from the attack

A New Approach for DDoS attacks to discriminate the attack level and provide security for DDoS nodes in MANET

Mobile Ad Hoc Networks (MANETs) enable versatile hosts to frame a correspondence arrange without a prefixed framework. In military applications portable specially appointed system assumes essential part since it is particularly planned network for on request necessity and in circumstances where set up of physical network isn't conceivable. Despite the fact that it gives high adaptability, it likewise conveys more difficulties for MANETs to battle against malicious assaults. In any case, the property of mobility and excess additionally motivates new plans to outline safeguard procedure. In this paper, we propose a procedure to relieve DDoS assaults in MANETs. Expect that a malicious attacker ordinarily targets particular victims. The attacker will surrender if the assault neglected to accomplish the coveted objectives after a specific length of assaulting time. In our assurance system, we exploit high excess and select a protection node. Once a DDoS attack has been identified, the suspicious movement will be diverted to the protection node. The victim will work typically, and it is sensible to expect that the attacker will stop the trivial endeavors. Through escalated recreation test utilizing NS-2, we have confirmed the viability of our approach and assessed the cost and overhead of the framework