Emergence in the security of protocols for mobile ad-hoc networks

This thesis is concerned with the study of secure wireless routing protocols, which have been deployed for the purpose of exchanging information in an adhoc networking enviromnent. A discrete event simulator is developed, utilising an adaptive systems modelling approach and emergence that aims to assess networking protocols in the presence of adversarial behaviour. The model is used in conjunction with the characteristics that routing protocols have and also a number of cryptographic primitives that can be deployed in order to safeguard the information being exchanged. It is shown that both adversarial behaviour, as well as protocol descriptions can be described in a way that allows for them to be treated as input on the machine level. Within the system, the output generated selects the fittest protocol design capable of withstanding one or more particular type of attacks. As a result, a number of new and improved protocol specifications are presented and benchmarked against conventional metrics, such as throughput, latency and delivery criteria. From this process, an architecture for designing wireless routing protocols based on a number of security criteria is presented, whereupon the decision of using particular characteristics in a specification has been passed onto the machine level

The Modified Secure AODV Routing Protocol for Black Hole Attack in Manet

Mobile Adhoc Network is gathering of portable nodes which are actively structuring a momentary network without utilizing any pre accessible network infrastructure or central management. Each node in MANET not only provides as a specific terminal but also performs as a router to form a route. While a source node plans to send data to an intended node, packets are moved from the middle nodes. An Adhoc routing protocol is a classical method that supervises how nodes opt any route and in which manner they have to route packets among computing devices in a MANET. Because of different factors with lack of infrastructure, deficiency of already established trust relationship among the various nodes and dynamic topology, the MANET routing protocols are weak to different routing attacks. In contrast to conventional wired networks, such type attacks are executed simply in MANET because of the unsupervised entrance to the wireless medium. The malicious exploitation of various routing information results in the diffusion of wrong routing information which could eventually guide to network failure. One of these attacks in the existing wireless routing protocol like Ad-hoc on demand Distance Vector (AODV) Routing protocol is the Black Hole Attack against network truthfulness. In this attack, the data packets doesn’t arrive at the destination node, thus data loss happens. There is number of detection and protection methods to reduce the intruder that achieve the black hole attack. Therefore, this paper proposes Modified Secure AODV routing protocols (MSAODV) found on threshold evaluation and cryptographic verification. In this paper, the black hole attack and the proposed MSAODV protocols are simulated in the Network Simulator NS-2 under different MANET circumstances and their performances are evaluated on various parameters like Packet drop ratio, routing overload, throughput etc. Keywords: AODV, Black hole, gray hole, worm hole attack, MANET, AOMD

Mobile ad hoc networks under wormhole attack: A simulation study

Security has become the main concern to grant protected communication between mobile nodes in an unfriendly environment.Wireless Ad Hoc network might be unprotected against attacks by malicious nodes.This paper evaluates the impact of some adversary attack on mobile Ad Hoc Network (MANET) system which has been tested using QualNet simulator.Moreover, it investigates the active and passive attack on MANET.At the same time, it measures the performance of MANET with and without these attacks.The simulation is done on data link layer and network layer of mobile nodes in wireless Ad Hoc network.The results of this evaluation are very important to estimate the deployment of the MANET nodes for security. Furthermore, this study analyzes the performance of MANET and performs “what-if” analyses to optimize them

Software Defined Networks based Smart Grid Communication: A Comprehensive Survey

The current power grid is no longer a feasible solution due to ever-increasing user demand of electricity, old infrastructure, and reliability issues and thus require transformation to a better grid a.k.a., smart grid (SG). The key features that distinguish SG from the conventional electrical power grid are its capability to perform two-way communication, demand side management, and real time pricing. Despite all these advantages that SG will bring, there are certain issues which are specific to SG communication system. For instance, network management of current SG systems is complex, time consuming, and done manually. Moreover, SG communication (SGC) system is built on different vendor specific devices and protocols. Therefore, the current SG systems are not protocol independent, thus leading to interoperability issue. Software defined network (SDN) has been proposed to monitor and manage the communication networks globally. This article serves as a comprehensive survey on SDN-based SGC. In this article, we first discuss taxonomy of advantages of SDNbased SGC.We then discuss SDN-based SGC architectures, along with case studies. Our article provides an in-depth discussion on routing schemes for SDN-based SGC. We also provide detailed survey of security and privacy schemes applied to SDN-based SGC. We furthermore present challenges, open issues, and future research directions related to SDN-based SGC.Comment: Accepte

Secure Group Communication in Delay Tolerant Mobile Ad-Hoc Network

Delay-tolerant networks (DTNs) are well-known for delivering various types of information from different senders in a multicast manner, both in centralised and decentralised networks. Wireless mobile nodes form small networks in which one or more senders transmit data to one or more destinations through intermediate nodes. DTN routing protocols differ from traditional wireless routing protocols. There are security threats in DTNs, such as blackhole attackers dropping data, jamming attacks consuming bandwidth, and Vampire attacks depleting battery power and available bandwidth. This paper proposes a prevention scheme to detect and mitigate all three types of attackers in multicast communication. These attackers can impact performance by generating false replies, flooding with redundant information, and wasting communication power. The primary focus of this paper is on security issues related to DTN routing protocols. In order to counter malicious nodes, a blacklist is maintained, and if a neighbour identifies a node as malicious, it excludes packets from that node. Meanwhile, the neighbour continues sending packets to the malicious node, except for broadcast packets, which are dropped. If a node is found to forward no packets or only some packets by all its neighbours, any reply it gives to route requests is disregarded, and any request it initiates is ignored. Successful data reception at the destination indicates that hop-based data delivery maintains a record of successful transmissions. The proposed security scheme demonstrates improved performance