A Community-based Approach for Service-based Application Composition in an Ecosystem -- Complexity Analysis of Data Routing Algorithms in Extended Lucas Cube Networks -- An Incremental Algorithm for Clustering Search Results -- Query Planning in DHT Based RDF Stores -- A Formal Methodology to Specify Hierarchical Agent-Based Systems -- Reducing RedundantWeb Crawling Using URL Signatures -- Interoperability Among Heterogeneous Systems in Smart Home Environment -- A Formal Framework to Specify and Deploy Reaction Policies -- A new distributed IDS based on CVSS framework -- Modeling and Testing SecureWeb Applications -- Secure interoperability with O2O contracts -- ADMON: I/O Workload Management by Visage Administration and Monitoring Service -- Extracting Neglected Content from Community-type-content.

This book is devoted to the emerging and novel concepts, architectures and methodologies for creating an interconnected world where information can be exchanged easily, tasks can be processed collaboratively, and communities of users with similar interests can be formed transcending borders, while addressing the increasingly pervasive security threats. This book is a collection of the best papers from WITDS Track of IEEE SITIS 2008. All the chapters are newly extended versions of the original papers. The book contains four parts; the first part is devoted to Ad Hoc and Routing Protocols where novel algorithms are proposed for ad hoc networks; the second part focuses on security and policies and the various innovative solutions; the third part covers efficient algorithms for web services; the fourth part features the various intelligent systems for agent systems, smart home environment, and service-driven applications.