The FOSAD symposia are a vital means of disseminating cutting-edge developments in computer network security. This collection features revised versions of nine lectures given at FOSAD tutorials by some of the world s leading researchers in the field. " The FOSAD symposia are a vital means of disseminating cutting-edge developments in computer network security. This collection features revised versions of nine lectures given at FOSAD tutorials by some of the world s leading researchers in the field. "