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Presented is an overview of computer security, including concepts, techniques, and mea-sures relating to the protection of computing systems and the information they maintain against deliberate or accidental threats. Motivations for security measures are discussed. Security strategies are considered. Actions and events that threaten security are described, along with technical problems that can prevent the computer from adequately dealing with threats. Security models are surveyed. Specific technical and administrative measures for promoting security are described. Among the technical measures discussed are design of secure systems, hardware and operating systems, identification of users, encryption, and access control packages. Administrative measures include personnel, physical security of the computing system, and auditing. Also presented is the establishment of a security program. Reviewed are special problems and their solutions, including communications and networks, data base management systems, and statistical data bases. This paper is based on a paper by the author published in Handbook of Computers and Computing, edited by Arthur H. Seidman and Ivan Flores, Van Nostrand Reinhold Company, Inc., New York (1984).
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