Dear Colleagues,

Smart networks are becoming part of our daily life. Social networks and novel infrastructure networks are all around us and promise new exciting opportunities of communication, collaboration and doing business. These new adventures come at a high price though: Our privacy.
Online privacy is one of the major concerns in todays modern society. Far too often we trade privacy for trust in order to reap the promised potential of such smart networks. Since the fundaments of rights shifted from the person to social circumstances, it is increasingly difficult to protect the privacy of individuals sharing a public space, or performing public activities.
This issue collects tutorials and original contributions in the area of trust and privacy in networks. Contributions are welcome that contain theoretical work about trust and privacy in networks as well as present practical examples from our daily life.

Dr. Dieter M. Arnold
Guest Editor

Submission

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• metrics for and fundamental limits of entropy in networks
• network topologies of social networks
• distributed trust models and security protocols
• practical example of security in infrastructure networks such as eGovernment, eHealth, and SmartGrid

Type of Paper: Article
Title: The Importance of DoS Attacks in Smart Ad hoc Networks (SAN)
Authors: Michalas Antonis ^1,2, Nikos Komninos ¹ and Neeli R. Prasad ²
Affiliation: ¹ Algorithms & Security Group, Athens Information Technology, GR-190-02, Peania, Greece
² Center for Teleinfrastruktur, Aalborg University, Niels Jernes Vej 12, 9220 Aalborg, Denmark; E-Mail: np@es.aau.dk (N.R.P.)
Abstract: Denial of Service (DoS) attack is one of the major threats in computer networks and especially for online applications such as e-commerce and military services. A DoS attack is an attempt to make a Web Resource or a Service unavailable or even destroy it so that legitimate users cannot make use of it. Such attacks could become very dangerous in a disaster recovery scenario where Mobile Ad hoc Networks (MANETs) are working together with sensor networks. In this paper, first of all we clarify the importance of providing DoS resilience in smart Ad hoc Networks (SAN). Then we describe already known techniques that provide DoS resilience and we point out the limitations of each technique. Finally, we present the specifications that a new technique would have to meet, in order to provide DoS resilience in SAN’s.