pThe information age has opened a new front of adversarial statecraft. The past decades have seen the rise and refinement of conflict enacted in the world of information, with tactics including seeding disinformation, the theft of sensitive data, confusing or obscuring public opinion to forward specific goals, and beyond. emDeterrence in the 21st Centuryem asks how, and if it is indeed possible, to deter an enemy in the realm of information warfare.p pSetting the stage with an overview of key concepts of deterrence in the information age, the book presents new conceptual approaches and their possible applications. Bringing together some of the most respected analysts working today, emDeterrence in the 21st Centuryem looks beyond the technical aspects of the use of information and disinformation as adversarial statecraft to seek new avenues to deter the undermining of institutions and societies.p pTreating deterrence as a concept, a policy, a social challenge, and a series of practical