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The purpose of computer security is to protect an organization's valuable resources, such as information, hardware, and software. Through the selection and application of appropriate safeguards, security helps the organization's mission by protecting its physical and financial resources, reputation, legal position, employees, and other tangible and intangible assets. Unfortunately, security is sometimes viewed as thwarting the mission of the organization by imposing poorly selected, bothersome rules and procedures on users, managers, and systems. On the contrary, well-chosen security rules and procedures do not exist for their own sake they are put in place to protect important assets and thereby support the overall organizational mission. Security, therefore, is a means to an end and not an end in itself. For example, in a private- sector business, having good security is usually secondary to the need to make a profit. Security, then, ought to increase the firm's ability to make a profit. In a public-sector agency, security is usually secondary to the agency's service provided to citizens. Security, then, ought to help improve the service provided to the citizen.To act on this, managers need to
understand both their organizational mission and how each information
system supports that mission. After a system's role has been defined, the
security requirements implicit in that role can be defined. Security can then
be explicitly stated in terms of the organization's mission.
The roles and functions of a system may not be constrained to a single
organization. In an interorganizational system, each organization benefits from
securing the system. For example, for electronic commerce to be successful,
each of the participants requires security controls to protect their resources.
However, good security on the buyer's system also benefits the seller; the
buyer's system is less likely to be used for fraud or to be unavailable or
otherwise negatively affect the seller. (The reverse is also true.)


Here i just changed my topic from computer hardwares and the protocols to the computer security.


Enjoy.....