Security is the degree of resistance to, or protection from, harm. It applies to any vulnerable and valuable asset, such as a person, dwelling, community, item, nation, or organization.
Computer security, also known as cybersecurity or IT security, is security applied to computing devices such as computers and smartphones, as well as computer networks such as private and public networks, including the whole Internet.
In the corporate world, various aspects of security are historically addressed separately - notably by distinct and often noncommunicating departments for IT security, physical security, and fraud prevention.
Today there is a greater recognition of the interconnected nature of security requirements