The term security is an inevitable part of every nation, irrespective of their socio-economic and political conditions. This commonly used term has undergone a smooth transition from traditional security to non-traditional or human security. This shift is visible in terms of both theoretical and practical perspective of world nations. The growing need to address the vulnerabilities of individuals, society and county made the shift to non-traditional security an inevitable process. This has paved way to focus on aspects other than mere military security which has been the pattern since formation of nation-states. This paper attempts to highlight literatures published on traditional security, its change-over to non-traditional security, nature characteristics and significance of the same.