Security/Mobility brings together research that examines the political regulation of movement with research that engages the material enablers of and constraints on such movement. It bridges theoretical perspectives from critical security studies and political geography in order to provide a more comprehensive perspective on security and mobility. In this vein, the book brings together approaches to mobility that take into account both techniques and practices of regulating movement, as well as their underlying infrastructures. Together they form a perspective on a politics of movement that is underpinned and shaped by a politics of security. This collection covers a broad range of topics, united by their goal to contribute to a more detailed perspective on a presumably mobile and insecure world. The title Security/Mobility is a direct reference to a world that appears dominated by these two paradigms. Demonstrated throughout the book security and mobility are not opposed to each other. To the contrary, a great deal of the politics of movement is undertaken in order to reconcile the need for security and the necessity of mobility. This book shows how those politics cover distinct yet connected areas such as internet infrastructure, the circulation of data, discourses of borders and bordering, bureaucracy and citizenship. Together, they offer a detailed picture of the manifold regulations and underpinning imaginaries of security and mobility that we encounter today.