-A MANET is an infrastructure-less type network, which consists of number of mobile nodes with wireless network interfaces In order to make communication among nodes, the nodes dynamically establish paths among one another. The nature and structure of such networks makes it attractive to various types of attackers. Security is a major concern for protected communication between mobile nodes. MA...

The foremost concerned security issue in mobile ad hoc networks is to protect the network layer from malicious attacks, thereby identifying and preventing malicious nodes. A unified security solution is in very much need for such networks to protect both route and data forwarding operations in the network layer. Without any appropriate security solution, the malicious nodes in the network can r...

Wireless Sensor Networks (WSNs) require an efficient intrusion detection scheme to identify malicious attackers. Traditional detection schemes are not well suited for WSNs due to their higher false detection rate. In this paper, we propose a novel intrusion detection scheme based on the energy prediction in cluster-based WSNs (EPIDS). The main contribution of EPIDS is to detect attackers by com...

Causing packet loss due to attacks by malicious nodes is one of the most important problem in MANETs. There are many ways by which packet loss can occur in MANETs such as broken links, transmission errors, no route to the destination and attacks caused by malicious nodes. To determine the exact cause of packet loss in wireless network is a challenging task. In this paper, we have investigated p...

In this paper, studying the effect of malicious nodes in the Wireless Sensor Networks (WSNs) is proposed. The low-cost, low data rate of the sensor nodes made the WSN a hot topic among researchers. Certain characteristics like dynamic topologies, limited data rate and limited battery power makes routing in WSN challenging compared to traditional networks. Earlier work on WSNs mainly focused on ...

Sensor networks for various event detection applications cannot function effectively if they are vulnerable to attacks. Malicious nodes can generate incorrect readings and misleading reports in such a way that event detection accuracy and false alarm rates are unacceptably low and high, respectively. In this paper, we present a malicious node detection scheme for wireless sensor networks. Unlik...

Link error and malicious nodes are responsible for packet drop in wireless ad hoc networks. When we observe a sequence of packet losses, may be due to link errors only, or by both link errors and malicious drop, we should determine the malicious node. In the insider-attack case, whereby malicious nodes that are part of the route exploit their knowledge of the interactions to drop a small amount...

1Asst. Professor, Department of Computer Science, Asan Memorial College of Arts and Science, Chennai, India. 2Head of the Department, Department of MCA, The Oxford College of Engineering, Bangalore, India. ---------------------------------------------------------------------***--------------------------------------------------------------------ABSTRACT:A mobile ad hoc network (MANET) is an infr...

We present a novel attack targeting anonymizing systems. The attack involves placing a malicious relay node inside an anonymizing system and keeping legitimate nodes “busy.” We achieve this by creating circular circuits and injecting fraudulent packets, crafted in a way that will make them spin an arbitrary number of times inside our artificial loops. At the same time we inject a small number o...

Cognitive radio is a revolutionary paradigm to migrate the spectrum scarcity problem in wireless networks. In cognitive radio networks, collaborative spectrum sensing is considered as an effective method to improve the performance of primary user detection. For current collaborative spectrum sensing schemes, secondary users are usually assumed to report their sensing information honestly. Howev...