When it comes to threats to national security in South Korea, terror attacks by North Korea and the invasion of International terrorist organization are not excluded. Given that background, the administration takes firm measures against the threats, such as intensive surveillance, for the sake of national security and public safety. In order to implement the security policy effectively, the cooperation with citizens and the agreement on the trade-off between liberty and security are highly necessary for the government. For this reason, this study examines the willingness of Korean teenagers to trade off civil liberties for national security. In addition, it seeks to understand why some teenagers are more willing to accept the capacity of national security control at the expense of civil liberties. In order to achieve the goal, it tests specific hypotheses regarding the effect of the factors, such as trust in government and national pride, on the willingness to trading civil liberties for national security. In result, the politics trust was found significantly related to the capacity of national security control. Specifically, those who trust in administration and in law enforcement were willing to support the national security control at the expense of civil liberties when necessary. Another finding included the positive association between national pride and capacity of national security control. Thus, before underlining the importance of national security, first of all, the government should show reliable abilities and exemplary conducts to the public. In addition, the government and educational institutions take the responsibility on fostering the youth with the righteous view on the national pride and identity.