Cyber warfare, a term that encompasses a wide range of computer-based attacks on targeted enemy states, has emerged as one of the most pressing national security concerns of the 21st century. All around the world, the scramble to shield thoroughly computerized military and infrastructure resources from cyber attacks is intensifying. This all-in-one resource written by an expert on the subject explains the world of cyber warfare in authoritative but accessible terms, utilizing a full suite of resources and materials. First, it details the historical evolution of cyber warfare and the different forms it can take, from crippling attacks on power grids and communications networks to secret intelligence gathering. From there it moves into a wide-ranging exploration of the main controversies and issues surrounding cyber security and cyber warfare, as well as coverage of major cyber warfare attacks, the organizations responsible, and the steps that the United States and other countries are taking to protect themselves from this constantly evolving threat. The work is further supplemented with a range of useful resources, including noteworthy primary sources, expert perspectives, and an extensive glossary of cyber warfare terms.