This collection of essays is divided in two parts. In the first part, security is considered from a theoretical angle, as a phenomenon that has become an integral part of modern society and inevitably interacts with law in many ways. The aim of the authors' analyses is to emphasise the ambiguity of the notion of security and its tendency to expand and affect simultaneously different fields of law. Depending on the adopted approach, security can be understood in many different terms and through various concepts. The second part of the book considers some of these security dilemmas in two specific areas of law: human rights and criminal law.