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PowerPoint Slideshow about 'computer security' - cygnismedia
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Computer Security: The protection afforded to an automated information system in order to attain the applicable objectives of preserving the integrity, availability and confidentiality of information system resources (includes hardware, software, firmware, information/data, and telecommunications).
Secrecy requires that the information in a computer systems only be accessible for reading by authorized parties. This type of access includes printing, displaying, and other forms of disclosure, including simply revealing the existing of an object.
Integrity: In lay usage, information has integrity when it is timely, accurate, complete, and consistent. However, computers are unable to provide or protect all of these qualities. Therefore, in the computer security field, integrity is often discussed more narrowly as having two data integrity and system integrity. "Data integrity is a requirement that information and programs are changed only in a specified and authorized manner." National Research Council, Computers at Risk, (Washington, DC: National Academy Press, 1991), p. 54. System integrity is a requirement that a system "performs its intended function in an unimpaired manner, free from deliberate or inadvertent unauthorized manipulation of the system." (National Computer Security Center, Pub. NCSC-TG-004-88.) The definition of integrity has been, and continues to be, the subject of much debate among computer security experts.
An asset of the system is destroyed or becomes unavailable or unusable. This is an attack on the availability. Examples include destruction of a piece of hardware, such as a hard disk, the cutting of a communication link, or the disabling of the file management system.
An unauthorized part inserts counterfeit objects into the system. This is an attack on the authenticity. Examples include the insertion of spurious messages in a network or the addition of records to a file.