Since the September 11 attacks, airport security has significantly changed and further strengthened to prevent possible terrorist's attacks. The measure has been taken to cut down the risk, and threats emerging from terrorists activities. One of the measures is the adoption of biometric body scanners, which are now widely used in airports as an additional security measure. However, their deployment has given rise to ethical and legal concerns among researchers, civil servants and public policy-makers.
Homeland Security is tasked to defend the homeland from any interior and external threats of terrorism either by deterrence, avoidance, ...