The book is divided into two parts. Part 1 deals with cyber warfare in general bringing out the unique characteristics of cyber space, the recent cyber attack on Estonia and the Stuxnet attack on Iranian Nuclear facilities, how the established Principles of War can be applied in cyberspace, cyber strategy of US and China, offensive and defensive aspects of cyber warfare cyber deterrence and the new challenge facing the militaries the world over- leadership in cyber domain. Part 2 is devoted to the Indian context. It discusses in detail the impact of ICT on the life of an ordinary Indian citizen, the cyber challenges facing the country and the implications for the Indian Armed Forces. A few recommendations have been summarised in the end.