This book combines theoretical discussions of the concepts at stake and case studies following the relevant developments of ICT and datadriven technologies. Part I sets the scene by considering definitions of security. Part II questions whether and if so to what extent the law has been able to regulate the use of ICT and datadriven technologies as a means to maintain protect or raise security in search of a balance between security and other public values such as privacy and equality. Part III investigates the regulatory means that can be leveraged by the lawmaker in attempts to secure products organizations or entities in a technological and multiactor environment. Lastly Part IV discusses typical international and national aspects of ICT security and the law.