With around 232 million migrants globally (according to estimates by the UN Department of Economic and Social Affairs) and much higher levels of short-term human movement and undocumented migration, the topic of global mobility is a crucial one to consider. This entry examines the interplay between the overarching topic of global [Page 428]mobility and the three concepts of surveillance, security, and privacy. After a brief overview, this entry approaches the study through four key phases in the migration (and shorter term movement) process: (1) preentry, (2) border crossing, (3) internal controls, and (4) detention and deportation. Emphasis is often on national security, but this piece will also critique this approach and touch on global mobility as a matter of individual human security. One crucial aspect ...