This volume addresses security detention in times of armed conflict, with a view to ascertaining whether international human rights norms on the right to personal liberty remain relevant when war rages and international humanitarian law is specifically applicable. The aim is twofold. First, this study seeks to outline the basic legal framework within which security detention may be considered under international human rights law. Second, it aims to investigate the extent to which the interaction between international human rights norms, on the one hand, and international humanitarian norms, on the other hand, affects the degree of protection that may be afforded to individuals in the context of both international and non-international armed conflict.