From the common workplace computer to systems for order fulfillment to entire business models like online shops; our increased dependence on both information as a resource and information systems is beyond question. The absence of either causes significant disruptions in our lives. Whether it is in our personal environment or on an enterprise scale, the confidentiality of our information, the availability of the systems and their integrity are some of the crucial security goals that must be upheld in order for us to benefit from the use of information systems.