Computer security has been studied as a discipline since the early 1970s. It refers tomeasures and controls that protect an information system against denial of service and unauthorized (accidental or intentional) disclosure modification or destruction of information systems and data [Abrams et al., 1997]. Researchers have commonly summarized computer security asconfidentiality integrity andavailability [ITSE, 1991]. Confidentiality refers to prevention/determent/detection of unauthorized disclosure of information; integrity refers to prevention/determent/detection of unauthorized modification of information; and availability refers to prevention/determent/detection of unauthorized withholding of information or resource.
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