Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

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A mobile ad hoc network (MANETs) consists of a group of mobile nodes which are connected by wireless links. The peculiar characteristics of MANET like open medium, high dynamic nature of the network lead to various attacks which partition or destroy entire network. A black hole attack can be working in opposition to routing in mobile adhoc networks. A black hole node is a malicious node which sends the fake reply for route requests and drops the packets. In this paper, a novel approach is proposed to detect blackhole nodes in the MANET. Our solutions find out the safe route between sending node and receiving node. The simulations show that the proposed approach is efficient than normal AODV when the black hole attack is present with high packet delivery and less packet drop. Â© 2010 Springer-Verlag Berlin Heidelberg.

Department of Software Systems

School of Computer Science and Engineering

Vellore Campus

Department of Database Systems

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Communications in Computer and Information Science

A Novel Security Approach for Detecting Black Hole Attack in MANET

Mobile ad hoc networks (MANETs) consist of a collection of wireless mobile nodes which dynamically exchange data among themselves without the need of fixed infrastructure or a wired backbone network. In MANET nodes are typically distinguished by their limited power, processing, and memory resources as well as high degree of mobility. In such networks, the wireless mobile nodes may dynamically enter the network as well as leave the network at any time. Due to limited transmission range of wireless network nodes, multiple hops are usually needed for a node to exchange information with any other node in the network. Thus routing is a crucial issue in the design of MANET. In this paper we deal with misbehaving nodes in mobile ad hoc networks (MANETs) that drop packets supposed to be relayed, whose purpose may be either saving their resources or launching a DoS attack. This paper also nvestigates the serious and harmful attack, "Denial of Service" (DOS) that exhibit in multiple forms across different layers of protocol stack. To defend against this attack, a novel Cross Layer Based Intrusion Detection System that performs accurate diagnosis of malicious attacks by analyzing the pattern of trace files, overcome the demerits such as false positives present in traditional IDS, thereby providing secure communication between nodes that communicate with each other to route the traffic from source to destination and also increase the efficiency of the network performance. The simulations conducted in ns-2 proved that this work has achieved high performance with fever overheads.

International Journal of Research and Reviews in Computer Science

A Mechanism for Detection of Denial of Service Attacks in Mobile Adhoc Networks

Mobile ad hoc networks (MANETs) consist of a collection of wireless mobile nodes which dynamically exchange data among themselves without the need of fixed infrastructure or a wired backbone network. Due to limited transmission range of wireless network nodes, multiple hops are usually needed for a node to exchange information with any other node in the network. Thus routing is a crucial issue in the design of MANET. On-demand routing protocols for mobile ad hoc networks discover and maintain only the needed routes to reduce routing overheads. They use a flood-based discovery mechanism to find routes when required. Since each route discovery incurs high overhead and latency, the frequency of route discoveries must be kept low for on demand protocols to be effective. The wide availability of wireless devices requires the routing protocol should be scalable. But, as the size of the network increases the on demand routing protocols produce poor performance due to large routing overhead generated while repairing route breaks. The proposed multipath routing scheme provides better performance and scalability by computing multiple routes in a single route discovery. Also, it reduces the routing overhead by using secondary paths. This scheme computes combination of the node-disjoint path and fail-safe paths for multiple routes and provides all the intermediate nodes of the primary path with multiple routes to destination.

International Journal of Engineering and Technology

An extended AODV protocol for multipath routing in MANETs

In this paper a framework called Team Automata (TA) has been introduced for capturing notions like co-ordination, collaboration and cooperation in distributed systems. It consists of component automata, combined in a coordinated way such that they can perform shared actions. Moreover, we consider a Spatio -Temporal Role Based Access Control Model (STRBAC) in the context of the team automata model, it describes the usage of the model and utility for capturing information security structures as well as critical coordination between these structures on the basis of Spatio -Temporal metaphor. In this work, Known access control strategies are given a formal description in terms of synchronization in TA. © 2010 Springer-Verlag Berlin Heidelberg.

Team automata based framework for spatio-temporal RBAC model

Currently the characteristics of web services and the complexity of the distributed environment poses a great challenges for its security. Moreover, there is no complete Role Based Access Control (RBAC) model and RBAC framework for Web Services that has been reported in the current literature which considers spatio-temporal constraints in its model. So, in this work we propose a spatio-temporal RBAC model for providing effective access control for Web Services. In this model SOAP Proxy has been employed to send messages for Web Services and security mechanisms are provided using rules, temporal and spatial constraints. In the proposed model, users are restricted to assign the role and to access the service only when (s) he satisfies some predefined identity and spatio-temporal constraits in addition to the enforcement of usual security and integrity constraints which are used for providing additional security. Finally, we use intelligent agents to rpovide security through rules and constraints and hence multiple agents are deployed. ©2009 IEEE.

2009 International Conference on Intelligent Agent and Multi-Agent Systems, IAMA 2009

An intelligent agent based framework for secure web services

In mobile ad hoc networks the nodes are dynamically changing and they have a fully decentralized topology. Hence, security is hard to achieve due to the dynamic nature of the relationships between the participating nodes as well as the vulnerabilities and limitations of the wireless transmissions medium. We proposed a novel agent based framework to monitor, detect, and isolate misbehaving nodes in the MANET. The proposed framework protect both routing and data forwarding operations, which aiming at improving the efficiency in detecting and isolating misbehaving nodes with a minimum overhead. In this paper local neighboring nodes collaboratively monitor each other. A novel honesty rate strategy is introduced in each node to determine the well-behaving nodes. We evaluate through network simulations the effectiveness of the framework in detecting malicious nodes and improving the network performance.

2009 First International Conference on Networks & Communications

An Agent Based Security Framework for Protecting Routing Layer Operations in MANET

An intrusion detection system framework using mobile agents is a layered framework mechanism designed to support heterogeneous network environments to identify intruders at its best. Traditional computer misuse detection techniques can identify known attacks efficiently, but perform very poorly in other cases. Anomaly detection has the potential to detect unknown attacks; however, it is a very challenging task since its aim is to detect unknown attacks without any priori knowledge about specific intrusions. This technology is still at its early stage. The objective of this paper is thatthe system can detect anomalous user activity. Existing research in this area focuses either on user activity or on program operation but not on both simultaneously. In this paper, an attempt to look at both concurrently is presented. Based on an intrusion detection framework [1], a novel user anomaly detection system has been implementedand conducted several intrusion detection experiments in a simulated environment by analyzing user activity and program operation activities. The proposed framework is a layered framework, which is designed to satisfy the core purpose of IDS, and allows detecting the intrusion as quickly as possible with available data using mobile agents. This framework was mainly designed to provide security for the network using mobile agent mechanisms to add mobility features to monitor the user processes from different computational systems. The experimental results have shown that the system can detectanomalous user activity effectively.

International Journal of Network Security and its Applications (IJNSA) 1 (2 …

Intelligent intrusion detection system framework using mobile agents

The important security issue in mobile ad hoc networks is to protect the routing layer from malicious attacks. A unified security solution for such networks is applied to protect both routing and data forwarding operations in the routing layer. In this paper the proposed model does not apply the cryptographic primitives on the routing messages This model protects the network by detecting and isolating the malicious nodes. In this proposed model, every node is monitoring other nearest neighboring nodes. A novel recognition strategy is applied to decrease its overhead as time evolves. In the proposed model information cross-validation is used to protect the network in a self-organized manner. Through both analysis and simulation results, the effectiveness of proposed model in a MANET environment is demonstrated.