Cyber security is gaining tremendous attention nowadays due to the increasing use of internet, computers by the media and various public and private institutions. They recognize the terrible impacts with the cyber attacks. At present, cyber attacks has resulted in computer based criminal activities which are generating worldwide threat, destruction and disruption. There is no cross border for cyber activities and the increase in the use of internet by the world wide users and lack of international cyber legal regime resulting the increase of the international cyber attacks. Cyber security involves preventative methods which are used to protect information from being stolen or attacked. Computer crime or cyber attack has become a widespread problem since the evolution of Information Systems. Cyber attack is a crime that involves a computer and a network. Cyber crime or a cyber attack is an attack where a person uses a computer to commit an illegal act. Cyber attack is a current emerging issue to all the sectors around the world.
2.2 Introduction to Cyber Space

There are no internationally agreed or legally binding definitions of ‘cyberspace’, ‘cyber attack’ or any other related terms. According to the Memorandum from the US Deputy Secretary of Defence, Cyber space is defined as the cyber activities can be performed for both
• Defensive and
• Offensive purposes. Defensive cyber activities include the following
• Upgrading or restoring a computer system that has been