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The United States Secret Service uses code names for U.S. presidents, first ladies, and other prominent persons and locations.
Within the U.S. government, security clearance levels serve as a mechanism to ascertain which individuals are authorized to access sensitive or classified information. These levels often appear in employment postings for Defense related jobs and other jobs involving substantial amounts of responsibility, such as air traffic control or nuclear ...
A secret decoder ring (or secret decoder) is a device that allows one to decode a simple substitution cipher—or to encrypt a message by working in the opposite direction.
Levels and categories of classification. The United States government classifies sensitive information according to the degree which the unauthorized disclosure would damage national security. The three primary levels of classification (from least to greatest) are Confidential, Secret, and Top Secret.
Classified information can be designated Top Secret, Secret or Confidential. These classifications are only used on matters of national interest. Top Secret: applies when compromise might reasonably cause exceptionally grave injury to the national interest. The possible impact must be great, immediate and irreparable.
Secret Coders is a series of graphic novels that combines logic puzzles, basic programming instruction, and a story where a group of seventh graders uncover a secret coding school. The series is written by Gene Luen Yang, illustrated by Mike Holmes, and published by First Second Books .
In cryptology, a code is a method used to encrypt a message that operates at the level of meaning; that is, words or phrases are converted into something else. A code might transform "change" into "CVGDK" or "cocktail lounge".
The Secret Code (1942) was the 19th serial released by Columbia Pictures. It features the masked hero "The Black Commando" facing Nazi saboteurs, inspired by Republic Pictures ' successful Spy Smasher serial of the same year.
The Codebreakers – The Story of Secret Writing ( ISBN 0-684-83130-9) is a book by David Kahn, published in 1967, comprehensively chronicling the history of cryptography from ancient Egypt to the time of its writing.
Secret. Secret clearance is only granted after a reliability status is cleared, with a positive CSIS security assessment. This level of clearance will grant the right to access designated and classified information up to Secret level on a need-to-know basis.