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The purpose of classification is to protect information. Higher classifications protect information that might endanger national security.Classification formalises what constitutes a "state secret" and accords different levels of protection based on the expected damage the information might cause in the wrong hands.
The Clinton administration made a major change in the classification system by issuing an executive order that for the first time required all classified documents to be declassified after 25 years unless they were reviewed by the agency that created the information and determined to require continuing classification. [26]
Classified information generally refers to information that is subject to special security classification regulations imposed by many national governments, the disclosure of which may cause harm to national interests and security. The protocol of restriction imposed upon such information is categorized into a hierarchy of classification levels ...
Compartmentalization, in information security, whether public or private, is the limiting of access to information to persons or other entities on a need-to-know basis to perform certain tasks. It originated in the handling of classified information in military and intelligence applications.
Sensitive compartmented information (SCI) is a type of United States classified information concerning or derived from sensitive intelligence sources, methods, or analytical processes. All SCI must be handled within formal access control systems established by the Director of National Intelligence .
Classification is a part of many different kinds of activities and is studied from many different points of view including medicine, philosophy [2], law, anthropology, biology, taxonomy, cognition, communications, knowledge organization, psychology, statistics, machine learning, economics and mathematics.
Data classification can be viewed as a multitude of labels that are used to define the type of data, especially on confidentiality and integrity issues. [1] Data classification is typically a manual process; however, there are tools that can help gather information about the data. [ 2 ]
Library classification systems are one of the two tools used to facilitate subject access. The other consists of alphabetical indexing languages such as Thesauri and Subject Headings systems. The practice of library classification is a form of the more general task of classification. The work consists of two steps.