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  2. Classified information in the United States - Wikipedia

    en.wikipedia.org/wiki/Classified_information_in...

    The United States has three levels of classification: Confidential, Secret, and Top Secret. Each level of classification indicates an increasing degree of sensitivity. Thus, if one holds a Top Secret security clearance, one is allowed to handle information up to the level of Top Secret, including Secret and Confidential information. If one ...

  3. Classified information - Wikipedia

    en.wikipedia.org/wiki/Classified_information

    Top Secret is the highest level of classified information. [4] Information is further compartmented so that specific access using a code word after top secret is a legal way to hide collective and important information. [5] Such material would cause "exceptionally grave damage" to national security if made publicly available. [6]

  4. Security clearance - Wikipedia

    en.wikipedia.org/wiki/Security_clearance

    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.

  5. Government Security Classifications Policy - Wikipedia

    en.wikipedia.org/wiki/Government_Security...

    The GSCP uses three levels of classification: OFFICIAL, SECRET and TOP SECRET. [2] This is simpler than the old model and there is no direct relationship between the old and new classifications. "Unclassified" is deliberately omitted from the new model.

  6. Special access program - Wikipedia

    en.wikipedia.org/wiki/Special_access_program

    The banner line might read SECRET//MEDIAN BELL//SPECIAL ACCESS REQUIRED, and the portion marking would read (S//MB). [18] Other variations move the special access warning to a second line, which would read MEDIAN BELL Special Control and Access Required (SCAR) Use Only or some other phrase directed by the program security instructions.

  7. Information sensitivity - Wikipedia

    en.wikipedia.org/wiki/Information_sensitivity

    Unlike personal and private information, there is no internationally recognized framework protecting trade secrets, or even an agreed-upon definition of the term “trade secret”. [18] However, many countries and political jurisdictions have taken the initiative to account for the violation of commercial confidentiality in their criminal or ...

  8. Secrecy - Wikipedia

    en.wikipedia.org/wiki/Secrecy

    Animals conceal the location of their den or nest from predators.Squirrels bury nuts, hiding them, and they try to remember their locations later. [2]Humans attempt to consciously conceal aspects of themselves from others due to shame, or from fear of violence, rejection, harassment, loss of acceptance, or loss of employment.

  9. Public-key cryptography - Wikipedia

    en.wikipedia.org/wiki/Public-key_cryptography

    Each key pair consists of a public key and a corresponding private key. [1] [2] Key pairs are generated with cryptographic algorithms based on mathematical problems termed one-way functions. Security of public-key cryptography depends on keeping the private key secret; the public key can be openly distributed without compromising security. [3]