Denial of service (DoS) and Distributed Denial of Service (DDoS) attacks continue to threaten the reliability of networking systems. Previous approaches for protecting networks from DoS attacks are reactive in that they wait for an attack to be launched before taking appropriate measures to protect the network. This leaves the door open for other attacks that use more sophisticated methods to m...

Cloud computing is considered as technical advancement in information technology. Many organizations have been motivated by this to outsource their data and computational needs. Such platforms are required fulfil basic security principles such confidentiality, availability, integrity. offers scalable virtualized services with a high flexibility level decreased maintenance costs end-users. The i...

Upgrading the software of long-lived distributed systems is difficult. It is not possible to upgrade all the nodes in a system at once, since some nodes may be down and halting the system for an upgrade is unacceptable. This means that different nodes may be running different software versions and yet need to communicate, even though those versions may not be fully compatible. We present a meth...

The realization of novel vehicular services requires a distributed computing and data management architecture in the roadside nodes. We illustrate the proposed architecture with a data transport service that can cope with connectivity disruptions, inherent to this kind of mobility. We discuss the results obtained by running the disruption tolerant service in a field trial on Austrian motorways.

Failing to control resources in mobile, concurrent and distributed systems may lead to important breakdowns or Denial of Service-like attacks. In order to address this problem, we present enhanced versions of several calculi for mobile and distributed computing, namely NBA, Seals, Nomadic π and Kells. In each case, we make the formalism resource-conscious and define a type system in order to gu...

In this paper, we present a study on the recent approaches in handling Distributed Denial of Service (DDoS) attacks. DDoS attack is a fairly new type of attack to cripple the availability of Internet services and resources. A DDos attack can originate from anywhere in the network and typically overwhelms the victim server by sending a huge number of packets. Several remedial measures have been ...

We propose a characterization of distributed denial-of-service (DDOS) defenses where reaction points are network-based and attack responses are active. The purpose is to provide a framework for comparing the performance and deployment of DDOS defenses. We identify the characteristics in attack detection algorithms and attack responses by reviewing defenses that have appeared in the literature. ...

Malicious intruders may launch as many invalid requests as possible without establishing a server connection to bring server service to a standstill. This is called a denial-of-service (DoS) or distributed DoS (DDoS) attack. Until now, there has been no complete solution to resisting a DoS/DDoS attack. Therefore, it is an important network security issue to reduce the impact of a DoS/DDoS attac...