The rapid evolution of the networking industry introduces new exciting challenges that need to be explored by the research community. The adoption of Internet as the global network infrastructure places the issue of quality of service among one of the hot topics nowadays: a huge diversity of applications with quite different service requirements must be supported over a basic core of protocols. Also, the open and uncontrolled nature of Internet enforces the need to guarantee secure transactions among users, thus placing security as another hot topic. Finally, the explosion of mobility and its integration as part of the global infrastructure are probably now the most challenging issues in the networking field.Key areas covered include:Network PolicyNetwork SecurityQuality of ServiceWireless NetworksIntelligent NetworksPerformance EvaluationIt contains the proceedings of the Third International Conference on Network Control and Engineering for QoS, Security and Mobility, Net-Con'2004, organised by the International Federation of Information processing and held at the Universitat de les Illes Balears, Spain in November 2004.This valuable new book will be essential reading for all those working in computer science and engineering departments, especially researchers, engineers and students in university and industry research laboratories.Dominique Gaïti is based at the Université Technique de Troyes, France and, Sebastià Galmés and Ramon Puigjaner at the Universitat de les Illes Balears, Spain.