Wireless sensor networks (WSNs) form a unique class of ad hoc networks consisting of heterogeneous but highly resource-constrained devices that can sense their environment and report sensed data to designated nodes in the network. We present a holistic ...

In order to create secure and dependable systems and information intelligence, it is a major challenge to determine the security level of the network. This security level depends on a number of dynamically changing factors including emerging of new vulnerabilities ...

This dissertation investigates two research problems to protect wireless network topology and routing: (1) designing protocols with configurable overhead to defend against wormhole attacks; (2) designing an intruder identification mechanism ...

The existing security schemes are not applicable to ad hoc networks perfectly because ad hoc networks have some inherent security vulnerabilities and stringent resource constraints. This paper suggests using CPK as the security mechanisms of ad hoc networks ...

In conventional egress network access control (NAC) based on access control lists (ACLs), modifying the ACLs is a heavy task for administrators. To enable configuration without a large amount of administrators' effort, we introduce capabilities to egress ...

The aim of this work is to evaluate the risk of an external attack to the network of our Department in the University. Thus, this work wants to complement the results in [M. Benini, S. Sicari, A mathematical framework for risk assessment, in: H. Labiod, ...

We propose in this paper a new intrusion detectionmethod for supporting high speed traffic. As in firewalls and routers, we rely on packet classification to specialize the task of several Network Intrusions Detection Systems (NIDSs). We build several ...

In this paper, we propose a scalable service scheme for secure group communication in grid. In the service scheme, a series of methods and strategies are presented, such as the initialization methods for group member, administrative domain and virtual ...

The extraordinary growth of the Information Society is originating a high dependency on ICT. This provokes that those strongly interrelated technological infrastructures, as well as the information systems that underpin them, become highly critical, ...

Local monitoring is an effective mechanism for the security of wireless sensor networks (WSNs). Existing schemes assume the existence of sufficient number of active nodes to carry out monitoring operations. Such an assumption, however, is often difficult ...

Intrusion Detection Systems (IDS) have become widely used tools for ensuring system and network security. Among many other challenges, contemporary IDS have to cope with increasingly higher bandwidths, which sometimes force them to let some data go by ...

According to traditional conceptions of cryptographic security, it is necessary to transmit a key, by secret means, before encrypted massages can be sent securely. This paper shows that it is possible to select a key over open communications channels ...

The importance of security has been recognized in ad hoc networks for many years. Consequently many secure routing methods have been proposed in this field. This paper discusses major security attacks in ad hoc networks, and proposes a number of prevention ...

Due to the complexity of Grid computing, many new security problems have appeared in grid, and so the traditional network security practices can not meet the security demand of grid.As a result, the study of security problems in grid is important,complicated ...

We propose a framework for collaborative defense by extending the original distributed intrusion detection model. It contains alert's collector, extractor, analyzer, report's generator, alert warehouse and alert's analysis. Besides, we develop a hybrid ...

This dissertation presents our work on the network intrusion detection and intrusion simulation. The work in intrusion detection consists of two different network anomaly-based approaches. The work in intrusion simulation introduces a model using explicit ...