This chapter describes Luciano Floridi’s information ethics and provides the conceptual framework that will be used to develop an informational approach to cyber attacks and the law on the use of force. It first locates Floridi’s information ethics within the philosophy of technology, outlining what Floridi describes to be the wider philosophical and technological transformations and challenges that give rise to the need for new conceptual toolkits such as information ethics. It then explores the key principles and concepts of information ethics, as well as the criticisms that have been levelled against it. These concepts – namely, the ontological equality principle, the infosphere, and entropy – will then be drawn upon to build an informational approach in subsequent chapters.