Concept of Security




Perceived security compared to real security




Categorizing security


Security concepts

Certain concepts recur throughout different fields of security:

Defense in depth - never rely on one single security measure alone

Home security

Home security is something applicable to all of us and involves the hardware in place on a property, and personal security practices. The hardware would be the doors, locks, alarm systems, lighting that is installed on your property. Personal security practices would be ensuring doors are locked, alarms activated, windows closed and many other routine tasks which act to prevent a burglary.

Computer security

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. The field includes all five components: hardware, software, data, people, and procedures by which digital equipment, information and services are protected from unintended or unauthorized access, change or destruction, and is of growing importance due to the increasing reliance of computer systems in most societies. It includes physical security to prevent theft of equipment and information security to protect the data on that equipment. Those terms generally do not refer to physical security, but a common belief among computer security experts is that a physical security breach is one of the worst kinds of security breaches as it generally allows full access to both data and equipment.

Security management in organizations

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, an approach variously known as holistic security, "all hazards" management, and other terms.



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