Some “non-” or “extra-functional” features, such as reliability, security, and tracing, defy modularization mechanisms in programming languages. This makes such features hard to design, implement, and maintain. Implementing such features within a single platform, using a single language, is hard enough. With distributed, heterogeneous (DH ) systems, these features induce complex implementations...

The automated provisioning of complex composite Cloud applications is a major issue and of vital importance in Cloud computing. It is key to enable Cloud properties such as pay-as-you-go pricing, on-demand self-service, and elasticity. The functional aspects of provisioning such as instantiating virtual machines or installing software components are covered by several technologies on different ...

The infrastructure networks of greatest importance to national security and stability include telecommunications, electrical power systems, gas and oil, banking and finance, transportation, water supply systems, government and emergency services. After the September 11, 2001 WTC attack, more sensors and surveillance systems are being deployed to monitor these critical infrastructures. While the...

For the purposes of the present discussion , a network is the telecommunications arrangement for transporting digital trafñc from place to place, and the boundary is considered to be at the interface between it and subscriber systems. Both homogeneous networks and heterogeneous networks are described and discussed in detail, and security concerns and threats are presented. The focus of concern ...

Distributed systems usually contain objects with heterogeneous security requirements that pose important challenges on the underlying security mechanisms and especially in access control systems. Access control in distributed systems often relies on centralized security administration. Existing solutions for distributed access control do not provide the flexibility and manageability required. T...

Distributed systems usually contain objects with heterogeneous security requirements that pose important challenges on the underlying security mechanisms and especially in access control systems. Access control in distributed systems often relies on centralized security administration. Existing solutions for distributed access control do not provide the flexibility and manageability required. T...

Information security in infrastructureless wireless sensor networks (WSNs) is one of the most important research challenges. In these networks, sensor nodes are typically sprinkled liberally in the field in order to monitor, gather, disseminate, and provide the sensed data to the command node. Various studies have focused on key establishment schemes in homogeneous WSNs. However, recent researc...

The computing integrated in modern vehicles has increased dramatically over the last decade, with many cars having over 50 compute units controlling critical and non-critical functions. These ECUs communicate over increasingly complex and heterogeneous networks, and these systems combined present challenges in terms of scalability, validation, and security. In this article, we present the conce...