Typical approaches to improving computer security can include the following:
Computer Security has three Layers:
Computer Security is a branch of technology known as information security as applied to computers. Information security means protecting information and information systems from unauthorized access, use, disclosure, disruption, modification, or destruction. The objective of computer security varies and can include protection of information from theft or corruption, or the preservation of availability, as defined in the security policy.
Technological and managerial procedures applied to computer systems to ensure the availability, integrity and confidentiality of information managed by the computer system. Computer security imposes requirements on computers that are different from most system requirements because they often take the form of constraints on what computers are not supposed to do.