Introduction To Computer security

Computer security is one of the branch of computer technology known as information security as applied to computers and networks. The main objective for a computer security includes protection of information and property from theft, corruption, or natural disaster, while allowing the information and property to remain accessible and productive to its intended users. The term referring to computer system security means the collective processes and mechanisms by which sensitive and valuable information and services are protected from publication, tampering or collapse by unauthorized activities or untrustworthy individuals and unplanned events respectively. The strategies or the methodologies of computer security often differ from most other computer technologies because of its somewhat elusive objective of preventing unwanted computer behavior instead of enabling wanted computer behavior.

Secure Operating System:

The technology to implement a secure operating system is known as computer security. The technology is based on science developed in the 1980s and used to produce what may be some of the most impenetrable operating systems ever. Though still it is valid, the technology is in limited use today, primarily because it imposes some changes to system management and also because it is not widely understood. Such ultra-stronger secure operating systems are based on operating system kernel technology that can guarantee that certain security policies are absolutely enforced in an operating environment. An example for such a Computer security policy is the Bell-LaPadula model.

The strategies are based on a coupling of special microprocessor hardware features, often involving the memory management unit, to a special correctly implemented operating system kernel. This forms some of the foundation for a secure operating system which, if certain critical parts are designed and implemented correctly, can ensure the absolute impossibility of penetration by hostile elements. This capability was enabled because the configuration not only imposes a security policy, but in theory completely protects itself from corruption. This design helps to produce such secure systems which are precise, deterministic and logical.