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The older system used five levels of classification, supplemented with caveat keywords. [4]: Annex One The keyword was placed in all capital letters in the centre of the top and bottom of each page of a classified document and described the foreseeable consequence of an unauthorised release of the data (a ‘breach of confidentiality’).
The UK prefix is added to the security classification of all assets sent to foreign governments or international organisations. This prefix designates the UK as the originating country and that the British Government should be consulted before any possible disclosure. [2] National caveats follow the security classification.
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.
Vetting in the UK is currently undergoing change as part of the Vetting Transformation Programme. This will see a series of "Levels" introduced and the phasing out of the current nomenclature. These new levels will be broadly: Accreditation Check (AC) = Level 1A; Counter Terrorist Check (CTC) = Level 1B; Security Check (SC) = Level 2
After the United States entered into World War II, Britain changed its security classifications to match those of the U.S..Previously, classifications had included the top classification "Most Secret", but it soon became apparent that the United States did not fully understand the UK's classifications, and classified information appeared in the U.S.'s press.
Eyes only is jargon used with regard to classified information.Whereas a classified document is normally intended to be available to readers with the appropriate security clearance and a need to know, an "eyes only" designation, whether official or informal, indicates that the document is intended only for a specific set of readers.
The initial ODNI review, completed in January 2008, found that "There appears to be no common understanding of classification levels among the classification guides reviewed by the team, nor any consistent guidance as to what constitutes 'damage,' 'serious damage,' or 'exceptionally grave damage' to national security." [51]
The Information Technology Security Evaluation Criteria (ITSEC) is a structured set of criteria for evaluating computer security within products and systems. The ITSEC was first published in May 1990 in France , Germany , the Netherlands , and the United Kingdom based on existing work in their respective countries.