This paper examines the vital element of National security in today’s world of globalization and information cyber security. The internet is revolutionizing our society by providing a fast, inexpensive and easy way to connect people and is an important source to drive economic growth. Internet has become increasingly central to our economy and social relations. There is now a close relationship between the physical world and cyber world and they affect each other. The revolution in the information technology, processes and internet connected computers are altering our way of living- how we communicate, perform banking transactions, make purchases and make use of this in diplomacy and wars. While the cyber world provides a number of facilities, it also brings with it a host of problems for security of communications, data and infrastructure.

This paper shows different aspects of cyber security its objective, functions, threats, challenges etc. and finally conclusion. At present time the development of cyber-assets depend upon how strong protection measure we have devised to protect it. It is the stage when cyber security should be placed at the zenith of priority even if it amounts to certain modifications and alterations in India’s cyber domain. If the cyber security of the country is to be preserved the most pertinent consideration is that the security measures must be devised keeping in mind the native conditions and shall be developed by the Indian minds. This consideration again remind us the reason behind formal division of roles and responsibilities between the civil and military functions of cyber security