This book offers a legal analysis of sharing of passenger data from the EU to the US in light of the EU legal framework protecting individuals’ privacy and personal data. It aims to situate this analysis with respect to the ever-growing policies of Global North countries to introduce pre-screening procedures in border control proceedings for the purpose of the fight against terrorism. By tracing the literature on the (in)securitisation and as such depoliticization of border controls through technology-led interventions, it explores the multiplicity of purposes that passenger data sharing entail and considers the question on the limitability of fundamental rights depending on its purpose.