Introduction. The dynamics of the post-Cold War global situation have caused a change in the perception of the threat, which was originally oriented to be a military threat, becomes a multidimensional threat that includes political, economic, social and cultural aspects, which then led to the revolution in nature of security. Besides that, with the increase in terrorist activities that started a few years ago as part of the changes in generational warfare, many states have changed their concept of security to protect and secure their nation. In short, security becomes a national interest and scholars begin to make further adjustments or modifications to the concept of security. The changes originally envisioned the more state-centered security becoming people-centered security. Before discussing the usefulness and changes in the concept of security, it is necessary to understand the meaning of security and the concept of security itself. The definition of security used most frequently by scholars is that of Barry Buzan, who in his book People, States, and Fear states that "security, in any objective sense, measures the absence of threat to acquired values, in the wiki sense, the absence of fear that such values ​​will be attacked” (Buzan, 1991:4). Ayoob stated that “security – insecurity is defined in relation to vulnerabilities – both internal and external – that threaten or have the potential to overthrow or weaken state structures, both territorial and institutional, and regimes of government” (Ayoob, 1995: 9). Another notion, “…security involves both coercive means of controlling an aggressor and all sorts of persuasion, strengthened by the prospect of mutually shared benefits, to transform hostility into cooperation” (Kolodziej, 2005: 25). Final, “security is not just a social issue... at the heart of a change of charter, London: Frank Cass.- Buzan, B. (2001), 'Human Security in International Perspective', in Mely C. Anthony and Mohammed Jawar Hassan (ed.), The Asia Pasific in the New Millenium: Political and Security Challenges, Kuala Lumpur: Institute of Strategic and International Studies.- Collins, A. (2013), Contemporary Security Studies. (3rd edition)- Dalby, S. (2009), Security and Environmental Change, Cambridge: Polity Press.- Deutsch in Rosenau. (2007),- Hough, Peter (2008), Understanding Global Security, 2nd edition, London: Routledge.- John Herz,- Kolodziej, Edward A. (2005), Security and International Relations, Cambridge University Press.- Smith, M.E. (2010), International Security: Politics, Perspectives, Basingtoke: Palgrave Macmillan.- Ullman, R. (1983), 'Redefining Security', International Security, 8/1.- Viotti & Kauppi, (1999), International Relations Theory.