Dr. Víctor A. Villagrá is an associate professor of the Technical University of Madrid in the Telematics Engineering Department (DIT). From 1989, he has been making research activities in the areas of Network and Service Management and Networks Security, participating in several national and international research projects in these areas. He is in charge also of the coordination and impartition of several courses in these areas, both in a undergraduate level and a post-graduate level.