Internet usage has increased significantly across developing economies in last decade and most of the enterprises are extensively reliable on computer networks for electronic mails to payment gateways. But, the scenario we live in today has become more and more connected, sophisticated and risk-prone to our network-delivered society. Nevertheless, it remains critical for enterprises to exploit the full potential of available technologies such as mobile computing, smart computing and cloud computing. A cyber security related gaffe in any of these rapidly emerging domains may lead to lost productivity and grave concerns to the enterprise. The chapter highlights the various concerns associated to cyber security, viz., how an attack may be operated and offered measures to secure the network and information technology resources within and outside the enterprise. In most of the developing economies no synchronized activities in this regard are taking place which opens the opportunity to cyber criminals intrude into the system and compromise the resources.